./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl --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 2468c605d5c29b15a54525a5c6944fa0a2b4d36426cacd5fefa10555cb2b8a7a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:21:10,932 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:21:11,025 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:21:11,035 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:21:11,036 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:21:11,081 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:21:11,082 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:21:11,082 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:21:11,083 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:21:11,084 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:21:11,085 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:21:11,085 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:21:11,086 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:21:11,086 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:21:11,087 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:21:11,088 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:21:11,088 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:21:11,089 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:21:11,089 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:21:11,090 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:21:11,090 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:21:11,093 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:21:11,095 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:21:11,095 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:21:11,101 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:21:11,102 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:21:11,103 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:21:11,103 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:21:11,103 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:11,104 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:21:11,104 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:21:11,105 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:21:11,105 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:21:11,106 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:21:11,106 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:21:11,107 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:21:11,107 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:21:11,108 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:21:11,108 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:21:11,109 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_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2468c605d5c29b15a54525a5c6944fa0a2b4d36426cacd5fefa10555cb2b8a7a [2023-11-12 02:21:11,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:21:11,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:21:11,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:21:11,414 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:21:11,415 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:21:11,416 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2023-11-12 02:21:14,753 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:21:15,027 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:21:15,028 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2023-11-12 02:21:15,045 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/data/4ed1f47c7/ee621a3efb554dadb54767e6381ce6ea/FLAG248cebb06 [2023-11-12 02:21:15,061 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/data/4ed1f47c7/ee621a3efb554dadb54767e6381ce6ea [2023-11-12 02:21:15,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:21:15,066 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:21:15,068 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:21:15,068 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:21:15,074 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:21:15,075 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:21:15" (1/1) ... [2023-11-12 02:21:15,077 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f2cda9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:15, skipping insertion in model container [2023-11-12 02:21:15,077 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:21:15" (1/1) ... [2023-11-12 02:21:15,140 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:21:15,334 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_be6ed42e-52ea-4eba-a906-6f4a54936a53/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[913,926] [2023-11-12 02:21:15,430 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_be6ed42e-52ea-4eba-a906-6f4a54936a53/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[5977,5990] [2023-11-12 02:21:15,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:21:15,583 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:21:15,600 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_be6ed42e-52ea-4eba-a906-6f4a54936a53/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[913,926] [2023-11-12 02:21:15,638 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_be6ed42e-52ea-4eba-a906-6f4a54936a53/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[5977,5990] [2023-11-12 02:21:15,714 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:21:15,748 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:21:15,749 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:15 WrapperNode [2023-11-12 02:21:15,749 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:21:15,750 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:21:15,751 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:21:15,751 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:21:15,761 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:15" (1/1) ... [2023-11-12 02:21:15,797 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:15" (1/1) ... [2023-11-12 02:21:15,869 INFO L138 Inliner]: procedures = 58, calls = 64, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 671 [2023-11-12 02:21:15,869 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:21:15,870 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:21:15,870 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:21:15,871 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:21:15,883 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:15" (1/1) ... [2023-11-12 02:21:15,884 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:15" (1/1) ... [2023-11-12 02:21:15,889 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:15" (1/1) ... [2023-11-12 02:21:15,890 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:15" (1/1) ... [2023-11-12 02:21:15,907 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:15" (1/1) ... [2023-11-12 02:21:15,921 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:15" (1/1) ... [2023-11-12 02:21:15,926 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:15" (1/1) ... [2023-11-12 02:21:15,930 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:15" (1/1) ... [2023-11-12 02:21:15,937 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:21:15,938 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:21:15,938 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:21:15,939 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:21:15,940 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:15" (1/1) ... [2023-11-12 02:21:15,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:15,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:15,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:21:16,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:21:16,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:21:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-12 02:21:16,116 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-12 02:21:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-11-12 02:21:16,116 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-11-12 02:21:16,116 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-12 02:21:16,117 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-12 02:21:16,117 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-12 02:21:16,117 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-12 02:21:16,117 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-12 02:21:16,118 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-12 02:21:16,118 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-12 02:21:16,118 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-12 02:21:16,119 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-12 02:21:16,119 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-12 02:21:16,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:21:16,119 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-12 02:21:16,119 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-12 02:21:16,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:21:16,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:21:16,120 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-12 02:21:16,121 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-12 02:21:16,121 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-11-12 02:21:16,121 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-11-12 02:21:16,264 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:21:16,266 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:21:16,980 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:21:16,991 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:21:16,998 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-12 02:21:17,003 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:17 BoogieIcfgContainer [2023-11-12 02:21:17,003 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:21:17,006 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:21:17,007 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:21:17,011 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:21:17,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:21:15" (1/3) ... [2023-11-12 02:21:17,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d6c5de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:17, skipping insertion in model container [2023-11-12 02:21:17,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:15" (2/3) ... [2023-11-12 02:21:17,014 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d6c5de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:17, skipping insertion in model container [2023-11-12 02:21:17,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:17" (3/3) ... [2023-11-12 02:21:17,016 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2023-11-12 02:21:17,036 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:21:17,037 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 02:21:17,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:21:17,147 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;@6fde539d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:21:17,147 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:21:17,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 293 states, 253 states have (on average 1.6007905138339922) internal successors, (405), 260 states have internal predecessors, (405), 27 states have call successors, (27), 10 states have call predecessors, (27), 10 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-12 02:21:17,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 02:21:17,172 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:17,177 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] [2023-11-12 02:21:17,177 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:17,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:17,186 INFO L85 PathProgramCache]: Analyzing trace with hash -895036036, now seen corresponding path program 1 times [2023-11-12 02:21:17,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:17,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699468138] [2023-11-12 02:21:17,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:17,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:17,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-12 02:21:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:17,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:21:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:17,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:17,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699468138] [2023-11-12 02:21:17,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699468138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:17,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:17,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:21:17,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122763135] [2023-11-12 02:21:17,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:17,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:17,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:17,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:17,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:21:17,688 INFO L87 Difference]: Start difference. First operand has 293 states, 253 states have (on average 1.6007905138339922) internal successors, (405), 260 states have internal predecessors, (405), 27 states have call successors, (27), 10 states have call predecessors, (27), 10 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:21:18,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:18,361 INFO L93 Difference]: Finished difference Result 637 states and 1000 transitions. [2023-11-12 02:21:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:21:18,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2023-11-12 02:21:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:18,386 INFO L225 Difference]: With dead ends: 637 [2023-11-12 02:21:18,386 INFO L226 Difference]: Without dead ends: 352 [2023-11-12 02:21:18,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:21:18,401 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 542 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:18,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 603 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:21:18,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2023-11-12 02:21:18,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 346. [2023-11-12 02:21:18,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 302 states have (on average 1.4768211920529801) internal successors, (446), 307 states have internal predecessors, (446), 31 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (33), 27 states have call predecessors, (33), 27 states have call successors, (33) [2023-11-12 02:21:18,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 510 transitions. [2023-11-12 02:21:18,523 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 510 transitions. Word has length 44 [2023-11-12 02:21:18,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:18,525 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 510 transitions. [2023-11-12 02:21:18,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:21:18,528 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 510 transitions. [2023-11-12 02:21:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-12 02:21:18,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:18,539 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] [2023-11-12 02:21:18,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:21:18,544 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:18,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:18,545 INFO L85 PathProgramCache]: Analyzing trace with hash -553118464, now seen corresponding path program 1 times [2023-11-12 02:21:18,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:18,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71098587] [2023-11-12 02:21:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:18,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:18,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-12 02:21:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:18,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-12 02:21:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:18,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:18,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71098587] [2023-11-12 02:21:18,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71098587] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:18,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:18,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:21:18,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737013599] [2023-11-12 02:21:18,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:18,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:18,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:18,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:18,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:21:18,682 INFO L87 Difference]: Start difference. First operand 346 states and 510 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:21:19,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:19,190 INFO L93 Difference]: Finished difference Result 594 states and 850 transitions. [2023-11-12 02:21:19,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:21:19,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2023-11-12 02:21:19,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:19,197 INFO L225 Difference]: With dead ends: 594 [2023-11-12 02:21:19,197 INFO L226 Difference]: Without dead ends: 470 [2023-11-12 02:21:19,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:21:19,200 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 230 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:19,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 803 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:21:19,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2023-11-12 02:21:19,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 413. [2023-11-12 02:21:19,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 363 states have (on average 1.4600550964187329) internal successors, (530), 368 states have internal predecessors, (530), 34 states have call successors, (34), 15 states have call predecessors, (34), 14 states have return successors, (36), 30 states have call predecessors, (36), 30 states have call successors, (36) [2023-11-12 02:21:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 600 transitions. [2023-11-12 02:21:19,277 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 600 transitions. Word has length 45 [2023-11-12 02:21:19,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:19,279 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 600 transitions. [2023-11-12 02:21:19,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:21:19,280 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 600 transitions. [2023-11-12 02:21:19,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-12 02:21:19,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:19,290 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] [2023-11-12 02:21:19,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:21:19,290 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:19,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:19,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1837475925, now seen corresponding path program 1 times [2023-11-12 02:21:19,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:19,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84940268] [2023-11-12 02:21:19,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:19,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:19,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-12 02:21:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:19,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-12 02:21:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:19,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:19,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84940268] [2023-11-12 02:21:19,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84940268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:19,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:19,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:21:19,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091546438] [2023-11-12 02:21:19,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:19,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:19,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:19,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:19,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:21:19,412 INFO L87 Difference]: Start difference. First operand 413 states and 600 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:21:19,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:19,800 INFO L93 Difference]: Finished difference Result 821 states and 1159 transitions. [2023-11-12 02:21:19,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:21:19,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2023-11-12 02:21:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:19,808 INFO L225 Difference]: With dead ends: 821 [2023-11-12 02:21:19,809 INFO L226 Difference]: Without dead ends: 630 [2023-11-12 02:21:19,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:21:19,819 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 552 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:19,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 595 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:21:19,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2023-11-12 02:21:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 578. [2023-11-12 02:21:19,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 509 states have (on average 1.4145383104125737) internal successors, (720), 517 states have internal predecessors, (720), 45 states have call successors, (45), 22 states have call predecessors, (45), 22 states have return successors, (53), 39 states have call predecessors, (53), 41 states have call successors, (53) [2023-11-12 02:21:19,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 818 transitions. [2023-11-12 02:21:19,895 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 818 transitions. Word has length 45 [2023-11-12 02:21:19,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:19,895 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 818 transitions. [2023-11-12 02:21:19,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:21:19,896 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 818 transitions. [2023-11-12 02:21:19,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-12 02:21:19,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:19,898 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:19,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:21:19,899 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:19,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:19,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1262824300, now seen corresponding path program 1 times [2023-11-12 02:21:19,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:19,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12793278] [2023-11-12 02:21:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:19,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:19,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-12 02:21:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:19,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-12 02:21:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:19,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-12 02:21:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:21:20,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:20,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12793278] [2023-11-12 02:21:20,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12793278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:20,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:20,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:21:20,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616352150] [2023-11-12 02:21:20,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:20,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:20,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:20,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:20,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:21:20,011 INFO L87 Difference]: Start difference. First operand 578 states and 818 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:21:20,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:20,526 INFO L93 Difference]: Finished difference Result 1162 states and 1603 transitions. [2023-11-12 02:21:20,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:21:20,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2023-11-12 02:21:20,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:20,534 INFO L225 Difference]: With dead ends: 1162 [2023-11-12 02:21:20,535 INFO L226 Difference]: Without dead ends: 806 [2023-11-12 02:21:20,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:21:20,538 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 214 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:20,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 853 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:21:20,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2023-11-12 02:21:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 768. [2023-11-12 02:21:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 675 states have (on average 1.362962962962963) internal successors, (920), 685 states have internal predecessors, (920), 59 states have call successors, (59), 30 states have call predecessors, (59), 32 states have return successors, (77), 53 states have call predecessors, (77), 55 states have call successors, (77) [2023-11-12 02:21:20,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1056 transitions. [2023-11-12 02:21:20,628 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1056 transitions. Word has length 62 [2023-11-12 02:21:20,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:20,628 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1056 transitions. [2023-11-12 02:21:20,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:21:20,629 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1056 transitions. [2023-11-12 02:21:20,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-12 02:21:20,632 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:20,632 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:20,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:21:20,633 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:20,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:20,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2091011082, now seen corresponding path program 1 times [2023-11-12 02:21:20,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:20,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592016953] [2023-11-12 02:21:20,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:20,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:20,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-12 02:21:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:20,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:21:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:20,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-12 02:21:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 02:21:20,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:20,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592016953] [2023-11-12 02:21:20,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592016953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:20,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:20,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:21:20,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131837315] [2023-11-12 02:21:20,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:20,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:20,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:20,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:20,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:21:20,724 INFO L87 Difference]: Start difference. First operand 768 states and 1056 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:21:21,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:21,138 INFO L93 Difference]: Finished difference Result 1421 states and 1909 transitions. [2023-11-12 02:21:21,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:21:21,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2023-11-12 02:21:21,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:21,145 INFO L225 Difference]: With dead ends: 1421 [2023-11-12 02:21:21,146 INFO L226 Difference]: Without dead ends: 967 [2023-11-12 02:21:21,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:21:21,148 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 539 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:21,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 594 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:21:21,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2023-11-12 02:21:21,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 912. [2023-11-12 02:21:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 803 states have (on average 1.3337484433374844) internal successors, (1071), 815 states have internal predecessors, (1071), 67 states have call successors, (67), 36 states have call predecessors, (67), 40 states have return successors, (91), 61 states have call predecessors, (91), 63 states have call successors, (91) [2023-11-12 02:21:21,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1229 transitions. [2023-11-12 02:21:21,214 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1229 transitions. Word has length 67 [2023-11-12 02:21:21,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:21,214 INFO L495 AbstractCegarLoop]: Abstraction has 912 states and 1229 transitions. [2023-11-12 02:21:21,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:21:21,215 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1229 transitions. [2023-11-12 02:21:21,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 02:21:21,218 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:21,218 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:21,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:21:21,219 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:21,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:21,220 INFO L85 PathProgramCache]: Analyzing trace with hash 101205040, now seen corresponding path program 1 times [2023-11-12 02:21:21,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:21,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424775438] [2023-11-12 02:21:21,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:21,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:21,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-12 02:21:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:21,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-12 02:21:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:21,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-12 02:21:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:21:21,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424775438] [2023-11-12 02:21:21,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424775438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:21,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666940989] [2023-11-12 02:21:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:21,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:21,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:21,428 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:21,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:21:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:21,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:21:21,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:21,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:21:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:21:21,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666940989] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:21,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:21:21,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2023-11-12 02:21:21,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046356873] [2023-11-12 02:21:21,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:21,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:21:21,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:21,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:21:21,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:21:21,883 INFO L87 Difference]: Start difference. First operand 912 states and 1229 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:21:22,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:22,070 INFO L93 Difference]: Finished difference Result 968 states and 1297 transitions. [2023-11-12 02:21:22,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:21:22,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2023-11-12 02:21:22,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:22,077 INFO L225 Difference]: With dead ends: 968 [2023-11-12 02:21:22,078 INFO L226 Difference]: Without dead ends: 965 [2023-11-12 02:21:22,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:21:22,083 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 745 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:22,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 510 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:21:22,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2023-11-12 02:21:22,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 911. [2023-11-12 02:21:22,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 803 states have (on average 1.3312577833125778) internal successors, (1069), 814 states have internal predecessors, (1069), 66 states have call successors, (66), 36 states have call predecessors, (66), 40 states have return successors, (91), 61 states have call predecessors, (91), 63 states have call successors, (91) [2023-11-12 02:21:22,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1226 transitions. [2023-11-12 02:21:22,176 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1226 transitions. Word has length 68 [2023-11-12 02:21:22,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:22,179 INFO L495 AbstractCegarLoop]: Abstraction has 911 states and 1226 transitions. [2023-11-12 02:21:22,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:21:22,180 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1226 transitions. [2023-11-12 02:21:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 02:21:22,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:22,183 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:22,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:22,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:22,390 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:22,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:22,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1158524103, now seen corresponding path program 1 times [2023-11-12 02:21:22,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:22,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497032115] [2023-11-12 02:21:22,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:22,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:22,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-12 02:21:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:22,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-12 02:21:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:22,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-12 02:21:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:21:22,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:22,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497032115] [2023-11-12 02:21:22,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497032115] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:22,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646710730] [2023-11-12 02:21:22,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:22,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:22,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:22,554 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:22,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:21:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:22,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:21:22,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:23,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:21:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:21:23,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646710730] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:21:23,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:21:23,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2023-11-12 02:21:23,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211155490] [2023-11-12 02:21:23,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:21:23,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:21:23,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:23,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:21:23,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:21:23,264 INFO L87 Difference]: Start difference. First operand 911 states and 1226 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-12 02:21:24,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:24,961 INFO L93 Difference]: Finished difference Result 2611 states and 3446 transitions. [2023-11-12 02:21:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-12 02:21:24,962 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2023-11-12 02:21:24,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:24,977 INFO L225 Difference]: With dead ends: 2611 [2023-11-12 02:21:24,977 INFO L226 Difference]: Without dead ends: 2067 [2023-11-12 02:21:24,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=1514, Unknown=0, NotChecked=0, Total=1806 [2023-11-12 02:21:24,982 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 851 mSDsluCounter, 2219 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 2605 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:24,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [877 Valid, 2605 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:21:24,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2023-11-12 02:21:25,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1300. [2023-11-12 02:21:25,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1153 states have (on average 1.3035559410234172) internal successors, (1503), 1172 states have internal predecessors, (1503), 86 states have call successors, (86), 50 states have call predecessors, (86), 59 states have return successors, (125), 78 states have call predecessors, (125), 83 states have call successors, (125) [2023-11-12 02:21:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1714 transitions. [2023-11-12 02:21:25,116 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1714 transitions. Word has length 69 [2023-11-12 02:21:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:25,117 INFO L495 AbstractCegarLoop]: Abstraction has 1300 states and 1714 transitions. [2023-11-12 02:21:25,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-12 02:21:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1714 transitions. [2023-11-12 02:21:25,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-12 02:21:25,126 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:25,127 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:25,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:25,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:25,334 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:25,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:25,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1880657665, now seen corresponding path program 1 times [2023-11-12 02:21:25,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:25,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162657440] [2023-11-12 02:21:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:25,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:25,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-12 02:21:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:25,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-12 02:21:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:25,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-12 02:21:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:25,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-12 02:21:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-12 02:21:25,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:25,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162657440] [2023-11-12 02:21:25,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162657440] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:25,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954668570] [2023-11-12 02:21:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:25,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:25,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:25,484 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:25,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:21:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:25,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:21:25,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:21:25,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:21:25,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954668570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:25,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:21:25,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 02:21:25,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595370623] [2023-11-12 02:21:25,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:25,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:21:25,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:25,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:21:25,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:21:25,677 INFO L87 Difference]: Start difference. First operand 1300 states and 1714 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-12 02:21:25,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:25,786 INFO L93 Difference]: Finished difference Result 2023 states and 2652 transitions. [2023-11-12 02:21:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:21:25,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2023-11-12 02:21:25,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:25,794 INFO L225 Difference]: With dead ends: 2023 [2023-11-12 02:21:25,795 INFO L226 Difference]: Without dead ends: 1178 [2023-11-12 02:21:25,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:21:25,798 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 379 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:25,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 524 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:21:25,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2023-11-12 02:21:25,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1163. [2023-11-12 02:21:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1032 states have (on average 1.303294573643411) internal successors, (1345), 1050 states have internal predecessors, (1345), 78 states have call successors, (78), 44 states have call predecessors, (78), 51 states have return successors, (111), 69 states have call predecessors, (111), 75 states have call successors, (111) [2023-11-12 02:21:25,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1534 transitions. [2023-11-12 02:21:25,895 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1534 transitions. Word has length 88 [2023-11-12 02:21:25,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:25,896 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 1534 transitions. [2023-11-12 02:21:25,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-12 02:21:25,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1534 transitions. [2023-11-12 02:21:25,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 02:21:25,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:25,902 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:25,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:26,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be6ed42e-52ea-4eba-a906-6f4a54936a53/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:26,109 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:26,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:26,110 INFO L85 PathProgramCache]: Analyzing trace with hash 502229916, now seen corresponding path program 1 times [2023-11-12 02:21:26,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:26,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137554416] [2023-11-12 02:21:26,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:26,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:26,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:21:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:26,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:21:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:26,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-12 02:21:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:26,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-12 02:21:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:26,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-12 02:21:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:26,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:26,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137554416] [2023-11-12 02:21:26,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137554416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:26,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:26,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:21:26,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342633994] [2023-11-12 02:21:26,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:26,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:21:26,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:26,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:21:26,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:21:26,426 INFO L87 Difference]: Start difference. First operand 1163 states and 1534 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2023-11-12 02:21:29,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:29,263 INFO L93 Difference]: Finished difference Result 1712 states and 2402 transitions. [2023-11-12 02:21:29,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:21:29,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2023-11-12 02:21:29,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:29,273 INFO L225 Difference]: With dead ends: 1712 [2023-11-12 02:21:29,273 INFO L226 Difference]: Without dead ends: 1510 [2023-11-12 02:21:29,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:21:29,276 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 884 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 1952 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 1723 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:29,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 1723 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1952 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-12 02:21:29,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2023-11-12 02:21:29,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1371. [2023-11-12 02:21:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1216 states have (on average 1.341282894736842) internal successors, (1631), 1236 states have internal predecessors, (1631), 94 states have call successors, (94), 50 states have call predecessors, (94), 59 states have return successors, (134), 86 states have call predecessors, (134), 91 states have call successors, (134) [2023-11-12 02:21:29,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 1859 transitions. [2023-11-12 02:21:29,407 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 1859 transitions. Word has length 102 [2023-11-12 02:21:29,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:29,408 INFO L495 AbstractCegarLoop]: Abstraction has 1371 states and 1859 transitions. [2023-11-12 02:21:29,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2023-11-12 02:21:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 1859 transitions. [2023-11-12 02:21:29,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 02:21:29,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:29,415 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:29,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:21:29,417 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:29,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:29,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1916254562, now seen corresponding path program 1 times [2023-11-12 02:21:29,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:29,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901905856] [2023-11-12 02:21:29,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:29,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:29,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:21:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:29,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:21:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:29,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-12 02:21:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:29,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-12 02:21:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:29,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-12 02:21:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:29,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:29,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901905856] [2023-11-12 02:21:29,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901905856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:29,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:29,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:21:29,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861788234] [2023-11-12 02:21:29,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:29,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:21:29,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:29,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:21:29,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:21:29,768 INFO L87 Difference]: Start difference. First operand 1371 states and 1859 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2023-11-12 02:21:32,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:32,890 INFO L93 Difference]: Finished difference Result 2410 states and 3487 transitions. [2023-11-12 02:21:32,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:21:32,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2023-11-12 02:21:32,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:32,903 INFO L225 Difference]: With dead ends: 2410 [2023-11-12 02:21:32,903 INFO L226 Difference]: Without dead ends: 2002 [2023-11-12 02:21:32,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:21:32,907 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 888 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 1867 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:32,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [904 Valid, 1628 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1867 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-12 02:21:32,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2023-11-12 02:21:33,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1755. [2023-11-12 02:21:33,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1558 states have (on average 1.3812580231065468) internal successors, (2152), 1580 states have internal predecessors, (2152), 122 states have call successors, (122), 62 states have call predecessors, (122), 73 states have return successors, (172), 116 states have call predecessors, (172), 119 states have call successors, (172) [2023-11-12 02:21:33,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 2446 transitions. [2023-11-12 02:21:33,119 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 2446 transitions. Word has length 102 [2023-11-12 02:21:33,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:33,120 INFO L495 AbstractCegarLoop]: Abstraction has 1755 states and 2446 transitions. [2023-11-12 02:21:33,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2023-11-12 02:21:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 2446 transitions. [2023-11-12 02:21:33,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 02:21:33,126 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:33,126 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:33,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:21:33,127 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:33,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:33,127 INFO L85 PathProgramCache]: Analyzing trace with hash 499581788, now seen corresponding path program 1 times [2023-11-12 02:21:33,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:33,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989565774] [2023-11-12 02:21:33,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:33,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:33,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:21:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:33,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:21:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:33,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-12 02:21:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:33,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-12 02:21:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:33,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-12 02:21:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:33,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:33,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989565774] [2023-11-12 02:21:33,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989565774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:33,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:33,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:21:33,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039111157] [2023-11-12 02:21:33,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:33,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:21:33,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:33,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:21:33,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:21:33,367 INFO L87 Difference]: Start difference. First operand 1755 states and 2446 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2023-11-12 02:21:34,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:34,755 INFO L93 Difference]: Finished difference Result 2797 states and 4093 transitions. [2023-11-12 02:21:34,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:21:34,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2023-11-12 02:21:34,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:34,771 INFO L225 Difference]: With dead ends: 2797 [2023-11-12 02:21:34,771 INFO L226 Difference]: Without dead ends: 2003 [2023-11-12 02:21:34,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:21:34,776 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 829 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:34,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 820 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:21:34,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2023-11-12 02:21:34,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1755. [2023-11-12 02:21:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1558 states have (on average 1.3780487804878048) internal successors, (2147), 1580 states have internal predecessors, (2147), 122 states have call successors, (122), 62 states have call predecessors, (122), 73 states have return successors, (172), 116 states have call predecessors, (172), 119 states have call successors, (172) [2023-11-12 02:21:34,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 2441 transitions. [2023-11-12 02:21:34,954 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 2441 transitions. Word has length 102 [2023-11-12 02:21:34,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:34,954 INFO L495 AbstractCegarLoop]: Abstraction has 1755 states and 2441 transitions. [2023-11-12 02:21:34,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2023-11-12 02:21:34,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 2441 transitions. [2023-11-12 02:21:34,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 02:21:34,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:34,960 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:34,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 02:21:34,961 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:34,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:34,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1824437982, now seen corresponding path program 1 times [2023-11-12 02:21:34,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:34,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68618942] [2023-11-12 02:21:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:34,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:35,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:21:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:35,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:21:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:35,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-12 02:21:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:35,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-12 02:21:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:35,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-12 02:21:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:35,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:35,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68618942] [2023-11-12 02:21:35,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68618942] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:35,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:35,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:21:35,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452060153] [2023-11-12 02:21:35,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:35,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:21:35,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:35,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:21:35,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:21:35,240 INFO L87 Difference]: Start difference. First operand 1755 states and 2441 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2023-11-12 02:21:38,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:38,286 INFO L93 Difference]: Finished difference Result 3771 states and 5576 transitions. [2023-11-12 02:21:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:21:38,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2023-11-12 02:21:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:38,315 INFO L225 Difference]: With dead ends: 3771 [2023-11-12 02:21:38,315 INFO L226 Difference]: Without dead ends: 2979 [2023-11-12 02:21:38,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:21:38,321 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 885 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 1820 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:38,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [901 Valid, 1626 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1820 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-12 02:21:38,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2979 states. [2023-11-12 02:21:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2979 to 2528. [2023-11-12 02:21:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2247 states have (on average 1.4196706720071206) internal successors, (3190), 2273 states have internal predecessors, (3190), 178 states have call successors, (178), 86 states have call predecessors, (178), 101 states have return successors, (254), 176 states have call predecessors, (254), 175 states have call successors, (254) [2023-11-12 02:21:38,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 3622 transitions. [2023-11-12 02:21:38,645 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 3622 transitions. Word has length 102 [2023-11-12 02:21:38,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:38,646 INFO L495 AbstractCegarLoop]: Abstraction has 2528 states and 3622 transitions. [2023-11-12 02:21:38,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2023-11-12 02:21:38,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 3622 transitions. [2023-11-12 02:21:38,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 02:21:38,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:38,654 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:38,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 02:21:38,654 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:38,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:38,655 INFO L85 PathProgramCache]: Analyzing trace with hash -903771364, now seen corresponding path program 1 times [2023-11-12 02:21:38,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:38,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262038395] [2023-11-12 02:21:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:38,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:38,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:21:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:38,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:21:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:38,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-12 02:21:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:38,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-12 02:21:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:38,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-12 02:21:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:38,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:38,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262038395] [2023-11-12 02:21:38,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262038395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:38,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:38,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:21:38,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612621044] [2023-11-12 02:21:38,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:38,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:21:38,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:38,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:21:38,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:21:38,898 INFO L87 Difference]: Start difference. First operand 2528 states and 3622 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2023-11-12 02:21:41,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:41,863 INFO L93 Difference]: Finished difference Result 6500 states and 9805 transitions. [2023-11-12 02:21:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:21:41,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2023-11-12 02:21:41,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:41,904 INFO L225 Difference]: With dead ends: 6500 [2023-11-12 02:21:41,905 INFO L226 Difference]: Without dead ends: 4935 [2023-11-12 02:21:41,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:21:41,914 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 885 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 1806 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:41,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [901 Valid, 1625 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1806 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-12 02:21:41,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4935 states. [2023-11-12 02:21:42,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4935 to 4081. [2023-11-12 02:21:42,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4081 states, 3632 states have (on average 1.455396475770925) internal successors, (5286), 3666 states have internal predecessors, (5286), 290 states have call successors, (290), 134 states have call predecessors, (290), 157 states have return successors, (436), 296 states have call predecessors, (436), 287 states have call successors, (436) [2023-11-12 02:21:42,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4081 states to 4081 states and 6012 transitions. [2023-11-12 02:21:42,440 INFO L78 Accepts]: Start accepts. Automaton has 4081 states and 6012 transitions. Word has length 102 [2023-11-12 02:21:42,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:42,440 INFO L495 AbstractCegarLoop]: Abstraction has 4081 states and 6012 transitions. [2023-11-12 02:21:42,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2023-11-12 02:21:42,441 INFO L276 IsEmpty]: Start isEmpty. Operand 4081 states and 6012 transitions. [2023-11-12 02:21:42,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 02:21:42,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:42,450 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:42,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 02:21:42,451 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:42,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:42,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1961609442, now seen corresponding path program 1 times [2023-11-12 02:21:42,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:42,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937647220] [2023-11-12 02:21:42,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:42,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:42,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:21:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:42,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:21:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:42,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-12 02:21:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:42,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-12 02:21:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:42,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-12 02:21:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:42,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:42,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:42,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937647220] [2023-11-12 02:21:42,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937647220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:42,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:42,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:21:42,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283376626] [2023-11-12 02:21:42,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:42,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:21:42,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:42,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:21:42,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:21:42,710 INFO L87 Difference]: Start difference. First operand 4081 states and 6012 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2023-11-12 02:21:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:45,919 INFO L93 Difference]: Finished difference Result 13221 states and 20211 transitions. [2023-11-12 02:21:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:21:45,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2023-11-12 02:21:45,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:46,023 INFO L225 Difference]: With dead ends: 13221 [2023-11-12 02:21:46,024 INFO L226 Difference]: Without dead ends: 10103 [2023-11-12 02:21:46,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:21:46,042 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1100 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:46,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1122 Valid, 1624 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1814 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-12 02:21:46,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10103 states. [2023-11-12 02:21:46,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10103 to 7154. [2023-11-12 02:21:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7154 states, 6385 states have (on average 1.4828504306969459) internal successors, (9468), 6435 states have internal predecessors, (9468), 498 states have call successors, (498), 230 states have call predecessors, (498), 269 states have return successors, (838), 520 states have call predecessors, (838), 495 states have call successors, (838) [2023-11-12 02:21:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7154 states to 7154 states and 10804 transitions. [2023-11-12 02:21:46,842 INFO L78 Accepts]: Start accepts. Automaton has 7154 states and 10804 transitions. Word has length 102 [2023-11-12 02:21:46,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:46,843 INFO L495 AbstractCegarLoop]: Abstraction has 7154 states and 10804 transitions. [2023-11-12 02:21:46,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2023-11-12 02:21:46,844 INFO L276 IsEmpty]: Start isEmpty. Operand 7154 states and 10804 transitions. [2023-11-12 02:21:46,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 02:21:46,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:46,856 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:46,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 02:21:46,857 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:46,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:46,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1190855388, now seen corresponding path program 1 times [2023-11-12 02:21:46,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:46,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562349390] [2023-11-12 02:21:46,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:46,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:46,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:21:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:46,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:21:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:47,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-12 02:21:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:47,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-12 02:21:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:47,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-12 02:21:47,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:47,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:47,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562349390] [2023-11-12 02:21:47,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562349390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:47,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:47,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:21:47,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033584235] [2023-11-12 02:21:47,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:47,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:21:47,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:47,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:21:47,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:21:47,061 INFO L87 Difference]: Start difference. First operand 7154 states and 10804 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2023-11-12 02:21:48,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:48,575 INFO L93 Difference]: Finished difference Result 15048 states and 23370 transitions. [2023-11-12 02:21:48,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:21:48,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2023-11-12 02:21:48,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:48,622 INFO L225 Difference]: With dead ends: 15048 [2023-11-12 02:21:48,622 INFO L226 Difference]: Without dead ends: 8855 [2023-11-12 02:21:48,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:21:48,647 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 852 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:48,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [869 Valid, 817 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:21:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8855 states. [2023-11-12 02:21:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8855 to 7154. [2023-11-12 02:21:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7154 states, 6385 states have (on average 1.4776820673453406) internal successors, (9435), 6435 states have internal predecessors, (9435), 498 states have call successors, (498), 230 states have call predecessors, (498), 269 states have return successors, (838), 520 states have call predecessors, (838), 495 states have call successors, (838) [2023-11-12 02:21:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7154 states to 7154 states and 10771 transitions. [2023-11-12 02:21:49,320 INFO L78 Accepts]: Start accepts. Automaton has 7154 states and 10771 transitions. Word has length 102 [2023-11-12 02:21:49,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:49,321 INFO L495 AbstractCegarLoop]: Abstraction has 7154 states and 10771 transitions. [2023-11-12 02:21:49,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2023-11-12 02:21:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 7154 states and 10771 transitions. [2023-11-12 02:21:49,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 02:21:49,332 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:49,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:49,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 02:21:49,332 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:49,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:49,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1431095134, now seen corresponding path program 1 times [2023-11-12 02:21:49,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:49,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506721366] [2023-11-12 02:21:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:49,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:49,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:21:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:49,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:21:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:49,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-12 02:21:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:49,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-12 02:21:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:49,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-12 02:21:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:49,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:49,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506721366] [2023-11-12 02:21:49,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506721366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:49,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:49,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:21:49,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128147161] [2023-11-12 02:21:49,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:49,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:21:49,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:49,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:21:49,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:21:49,561 INFO L87 Difference]: Start difference. First operand 7154 states and 10771 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2023-11-12 02:21:52,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:52,713 INFO L93 Difference]: Finished difference Result 23942 states and 36987 transitions. [2023-11-12 02:21:52,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:21:52,714 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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 102 [2023-11-12 02:21:52,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:52,788 INFO L225 Difference]: With dead ends: 23942 [2023-11-12 02:21:52,789 INFO L226 Difference]: Without dead ends: 17751 [2023-11-12 02:21:52,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:21:52,812 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 920 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 1927 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:52,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [935 Valid, 1621 Invalid, 2003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1927 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-12 02:21:52,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17751 states. [2023-11-12 02:21:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17751 to 13346. [2023-11-12 02:21:53,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13346 states, 11953 states have (on average 1.495524136200117) internal successors, (17876), 12035 states have internal predecessors, (17876), 898 states have call successors, (898), 422 states have call predecessors, (898), 493 states have return successors, (1788), 952 states have call predecessors, (1788), 895 states have call successors, (1788) [2023-11-12 02:21:54,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13346 states to 13346 states and 20562 transitions. [2023-11-12 02:21:54,006 INFO L78 Accepts]: Start accepts. Automaton has 13346 states and 20562 transitions. Word has length 102 [2023-11-12 02:21:54,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:54,007 INFO L495 AbstractCegarLoop]: Abstraction has 13346 states and 20562 transitions. [2023-11-12 02:21:54,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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) [2023-11-12 02:21:54,007 INFO L276 IsEmpty]: Start isEmpty. Operand 13346 states and 20562 transitions. [2023-11-12 02:21:54,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-12 02:21:54,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:54,024 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:54,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-12 02:21:54,024 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:54,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:54,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1458160736, now seen corresponding path program 1 times [2023-11-12 02:21:54,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:54,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174654236] [2023-11-12 02:21:54,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:54,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:54,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-12 02:21:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:54,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:21:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:54,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-12 02:21:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:54,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-12 02:21:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:54,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-12 02:21:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:21:54,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:54,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174654236] [2023-11-12 02:21:54,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174654236] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:54,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:54,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:21:54,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594950831] [2023-11-12 02:21:54,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:54,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:21:54,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:54,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:21:54,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:21:54,218 INFO L87 Difference]: Start difference. First operand 13346 states and 20562 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 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)