./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9629d1cdaf2a4c1ffb7c786f584a153b15eed3823334fbbe8ec635b18d57c1af --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:26:11,189 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:26:11,273 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:26:11,280 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:26:11,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:26:11,311 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:26:11,312 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:26:11,312 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:26:11,313 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:26:11,314 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:26:11,314 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:26:11,315 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:26:11,316 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:26:11,317 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:26:11,317 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:26:11,318 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:26:11,319 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:26:11,319 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:26:11,320 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:26:11,320 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:26:11,321 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:26:11,327 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:26:11,328 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:26:11,328 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:26:11,329 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:26:11,329 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:26:11,330 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:26:11,330 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:26:11,331 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:26:11,331 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:26:11,332 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:26:11,332 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:26:11,333 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:26:11,333 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:26:11,333 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:26:11,334 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:26:11,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:26:11,334 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:26:11,335 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:26:11,335 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:26:11,335 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:26:11,335 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:26:11,336 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_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9629d1cdaf2a4c1ffb7c786f584a153b15eed3823334fbbe8ec635b18d57c1af [2023-11-21 22:26:11,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:26:11,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:26:11,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:26:11,632 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:26:11,633 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:26:11,634 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c [2023-11-21 22:26:14,853 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:26:15,184 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:26:15,186 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c [2023-11-21 22:26:15,210 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/data/ea72a4616/e4ab8b6256ca49cf856c2223b1cfe1a1/FLAGc404f515b [2023-11-21 22:26:15,237 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/data/ea72a4616/e4ab8b6256ca49cf856c2223b1cfe1a1 [2023-11-21 22:26:15,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:26:15,248 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:26:15,251 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:26:15,251 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:26:15,257 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:26:15,258 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:26:15" (1/1) ... [2023-11-21 22:26:15,259 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30bb53bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:15, skipping insertion in model container [2023-11-21 22:26:15,259 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:26:15" (1/1) ... [2023-11-21 22:26:15,326 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:26:15,484 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_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c[911,924] [2023-11-21 22:26:15,574 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_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c[8416,8429] [2023-11-21 22:26:15,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:26:15,689 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:26:15,701 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_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c[911,924] [2023-11-21 22:26:15,741 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_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c[8416,8429] [2023-11-21 22:26:15,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:26:15,847 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:26:15,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:15 WrapperNode [2023-11-21 22:26:15,848 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:26:15,850 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:26:15,850 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:26:15,850 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:26:15,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:15" (1/1) ... [2023-11-21 22:26:15,878 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:15" (1/1) ... [2023-11-21 22:26:15,943 INFO L138 Inliner]: procedures = 69, calls = 83, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 814 [2023-11-21 22:26:15,944 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:26:15,944 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:26:15,945 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:26:15,945 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:26:15,959 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:15" (1/1) ... [2023-11-21 22:26:15,959 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:15" (1/1) ... [2023-11-21 22:26:15,964 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:15" (1/1) ... [2023-11-21 22:26:15,984 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 22:26:15,991 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:15" (1/1) ... [2023-11-21 22:26:15,991 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:15" (1/1) ... [2023-11-21 22:26:16,007 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:15" (1/1) ... [2023-11-21 22:26:16,028 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:15" (1/1) ... [2023-11-21 22:26:16,046 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:15" (1/1) ... [2023-11-21 22:26:16,051 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:15" (1/1) ... [2023-11-21 22:26:16,073 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:26:16,074 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:26:16,075 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:26:16,075 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:26:16,076 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:15" (1/1) ... [2023-11-21 22:26:16,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:26:16,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:26:16,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:26:16,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:26:16,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:26:16,190 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-21 22:26:16,191 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-21 22:26:16,191 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-21 22:26:16,193 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-21 22:26:16,193 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-21 22:26:16,194 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-21 22:26:16,194 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-21 22:26:16,194 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-21 22:26:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-21 22:26:16,195 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-21 22:26:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-21 22:26:16,195 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-21 22:26:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-21 22:26:16,196 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-21 22:26:16,196 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-21 22:26:16,220 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-21 22:26:16,220 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-21 22:26:16,220 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-21 22:26:16,220 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-21 22:26:16,220 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-21 22:26:16,221 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-21 22:26:16,221 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-21 22:26:16,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:26:16,221 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-21 22:26:16,221 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-21 22:26:16,221 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-21 22:26:16,221 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-21 22:26:16,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:26:16,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:26:16,222 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-21 22:26:16,222 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-21 22:26:16,222 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-11-21 22:26:16,222 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-11-21 22:26:16,396 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:26:16,399 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:26:17,213 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2023-11-21 22:26:17,214 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2023-11-21 22:26:17,304 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:26:17,878 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:26:17,878 INFO L308 CfgBuilder]: Removed 14 assume(true) statements. [2023-11-21 22:26:17,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:26:17 BoogieIcfgContainer [2023-11-21 22:26:17,880 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:26:17,884 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:26:17,885 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:26:17,888 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:26:17,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:26:15" (1/3) ... [2023-11-21 22:26:17,890 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3228fe37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:26:17, skipping insertion in model container [2023-11-21 22:26:17,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:15" (2/3) ... [2023-11-21 22:26:17,892 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3228fe37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:26:17, skipping insertion in model container [2023-11-21 22:26:17,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:26:17" (3/3) ... [2023-11-21 22:26:17,894 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.07.cil-2.c [2023-11-21 22:26:17,915 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:26:17,915 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 22:26:17,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:26:17,985 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;@47ba4c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:26:17,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 22:26:17,991 INFO L276 IsEmpty]: Start isEmpty. Operand has 226 states, 169 states have (on average 1.5088757396449703) internal successors, (255), 177 states have internal predecessors, (255), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-21 22:26:18,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-21 22:26:18,001 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:18,002 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] [2023-11-21 22:26:18,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:18,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:18,008 INFO L85 PathProgramCache]: Analyzing trace with hash -218878936, now seen corresponding path program 1 times [2023-11-21 22:26:18,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:18,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557714639] [2023-11-21 22:26:18,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:18,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:18,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:26:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:18,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:26:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:18,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:26:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:18,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:26:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:18,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-21 22:26:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:18,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-21 22:26:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:18,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-21 22:26:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:18,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:18,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557714639] [2023-11-21 22:26:18,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557714639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:18,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:18,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 22:26:18,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546418758] [2023-11-21 22:26:18,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:18,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:26:18,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:18,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:26:18,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:26:18,727 INFO L87 Difference]: Start difference. First operand has 226 states, 169 states have (on average 1.5088757396449703) internal successors, (255), 177 states have internal predecessors, (255), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 22:26:19,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:19,869 INFO L93 Difference]: Finished difference Result 505 states and 741 transitions. [2023-11-21 22:26:19,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:26:19,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2023-11-21 22:26:19,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:19,892 INFO L225 Difference]: With dead ends: 505 [2023-11-21 22:26:19,893 INFO L226 Difference]: Without dead ends: 283 [2023-11-21 22:26:19,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:26:19,902 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 653 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:19,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 664 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 22:26:19,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-21 22:26:19,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 278. [2023-11-21 22:26:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 207 states have (on average 1.434782608695652) internal successors, (297), 212 states have internal predecessors, (297), 49 states have call successors, (49), 22 states have call predecessors, (49), 20 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-11-21 22:26:19,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 391 transitions. [2023-11-21 22:26:19,998 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 391 transitions. Word has length 44 [2023-11-21 22:26:19,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:19,999 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 391 transitions. [2023-11-21 22:26:19,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 22:26:19,999 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 391 transitions. [2023-11-21 22:26:20,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-21 22:26:20,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:20,003 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] [2023-11-21 22:26:20,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:26:20,003 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:20,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:20,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1742649863, now seen corresponding path program 1 times [2023-11-21 22:26:20,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:20,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177889206] [2023-11-21 22:26:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:20,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:20,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:26:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:20,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:26:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:20,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:26:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:20,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:26:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:20,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:26:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:20,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-21 22:26:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:20,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-21 22:26:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:20,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:20,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177889206] [2023-11-21 22:26:20,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177889206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:20,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:20,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-21 22:26:20,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153464963] [2023-11-21 22:26:20,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:20,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 22:26:20,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:20,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 22:26:20,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:26:20,252 INFO L87 Difference]: Start difference. First operand 278 states and 391 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 22:26:22,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:22,001 INFO L93 Difference]: Finished difference Result 700 states and 975 transitions. [2023-11-21 22:26:22,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-21 22:26:22,002 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-11-21 22:26:22,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:22,007 INFO L225 Difference]: With dead ends: 700 [2023-11-21 22:26:22,007 INFO L226 Difference]: Without dead ends: 343 [2023-11-21 22:26:22,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2023-11-21 22:26:22,012 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 1026 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1041 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:22,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1041 Valid, 1032 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-21 22:26:22,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-11-21 22:26:22,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 324. [2023-11-21 22:26:22,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 236 states have (on average 1.3728813559322033) internal successors, (324), 241 states have internal predecessors, (324), 59 states have call successors, (59), 29 states have call predecessors, (59), 27 states have return successors, (58), 55 states have call predecessors, (58), 55 states have call successors, (58) [2023-11-21 22:26:22,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 441 transitions. [2023-11-21 22:26:22,080 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 441 transitions. Word has length 45 [2023-11-21 22:26:22,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:22,080 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 441 transitions. [2023-11-21 22:26:22,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 22:26:22,081 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 441 transitions. [2023-11-21 22:26:22,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-21 22:26:22,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:22,083 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] [2023-11-21 22:26:22,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:26:22,084 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:22,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:22,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1819041221, now seen corresponding path program 1 times [2023-11-21 22:26:22,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:22,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316515207] [2023-11-21 22:26:22,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:22,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:22,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:26:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:22,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:26:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:22,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:26:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:22,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:26:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:22,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:26:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:22,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-21 22:26:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:22,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:26:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:22,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:22,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316515207] [2023-11-21 22:26:22,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316515207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:22,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:22,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-21 22:26:22,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389607712] [2023-11-21 22:26:22,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:22,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 22:26:22,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:22,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 22:26:22,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:26:22,298 INFO L87 Difference]: Start difference. First operand 324 states and 441 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 22:26:24,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:24,003 INFO L93 Difference]: Finished difference Result 790 states and 1064 transitions. [2023-11-21 22:26:24,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-21 22:26:24,004 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2023-11-21 22:26:24,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:24,010 INFO L225 Difference]: With dead ends: 790 [2023-11-21 22:26:24,010 INFO L226 Difference]: Without dead ends: 613 [2023-11-21 22:26:24,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2023-11-21 22:26:24,013 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 962 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:24,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [982 Valid, 1076 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-21 22:26:24,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2023-11-21 22:26:24,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 588. [2023-11-21 22:26:24,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 417 states have (on average 1.2973621103117505) internal successors, (541), 422 states have internal predecessors, (541), 108 states have call successors, (108), 63 states have call predecessors, (108), 61 states have return successors, (129), 104 states have call predecessors, (129), 104 states have call successors, (129) [2023-11-21 22:26:24,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 778 transitions. [2023-11-21 22:26:24,097 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 778 transitions. Word has length 46 [2023-11-21 22:26:24,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:24,097 INFO L495 AbstractCegarLoop]: Abstraction has 588 states and 778 transitions. [2023-11-21 22:26:24,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-21 22:26:24,098 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 778 transitions. [2023-11-21 22:26:24,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-21 22:26:24,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:24,100 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] [2023-11-21 22:26:24,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:26:24,101 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:24,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:24,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1838968535, now seen corresponding path program 1 times [2023-11-21 22:26:24,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:24,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270805385] [2023-11-21 22:26:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:24,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:24,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:26:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:24,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:26:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:24,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:26:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:24,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:26:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:24,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:26:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:24,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-21 22:26:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:24,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:26:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:24,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:24,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270805385] [2023-11-21 22:26:24,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270805385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:24,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:24,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:26:24,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931671864] [2023-11-21 22:26:24,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:24,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:26:24,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:24,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:26:24,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:26:24,208 INFO L87 Difference]: Start difference. First operand 588 states and 778 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:26:24,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:24,781 INFO L93 Difference]: Finished difference Result 589 states and 779 transitions. [2023-11-21 22:26:24,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:26:24,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2023-11-21 22:26:24,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:24,784 INFO L225 Difference]: With dead ends: 589 [2023-11-21 22:26:24,785 INFO L226 Difference]: Without dead ends: 145 [2023-11-21 22:26:24,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:26:24,788 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 398 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:24,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 534 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:26:24,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-21 22:26:24,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-21 22:26:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 115 states have (on average 1.4695652173913043) internal successors, (169), 117 states have internal predecessors, (169), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-21 22:26:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 213 transitions. [2023-11-21 22:26:24,809 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 213 transitions. Word has length 50 [2023-11-21 22:26:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:24,810 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 213 transitions. [2023-11-21 22:26:24,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:26:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 213 transitions. [2023-11-21 22:26:24,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-21 22:26:24,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:24,812 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] [2023-11-21 22:26:24,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:26:24,813 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:24,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:24,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1456908548, now seen corresponding path program 1 times [2023-11-21 22:26:24,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:24,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231564807] [2023-11-21 22:26:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:24,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:24,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:26:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:24,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:26:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:25,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:26:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:25,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-21 22:26:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:25,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-21 22:26:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:25,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:25,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231564807] [2023-11-21 22:26:25,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231564807] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:25,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:25,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 22:26:25,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616112165] [2023-11-21 22:26:25,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:25,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:26:25,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:25,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:26:25,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:26:25,157 INFO L87 Difference]: Start difference. First operand 145 states and 213 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 5 states have internal predecessors, (42), 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) [2023-11-21 22:26:27,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:27,312 INFO L93 Difference]: Finished difference Result 663 states and 1036 transitions. [2023-11-21 22:26:27,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 22:26:27,313 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 5 states have internal predecessors, (42), 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 53 [2023-11-21 22:26:27,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:27,318 INFO L225 Difference]: With dead ends: 663 [2023-11-21 22:26:27,318 INFO L226 Difference]: Without dead ends: 524 [2023-11-21 22:26:27,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2023-11-21 22:26:27,321 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 922 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:27,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [943 Valid, 763 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-21 22:26:27,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-11-21 22:26:27,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 516. [2023-11-21 22:26:27,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 419 states have (on average 1.4510739856801909) internal successors, (608), 424 states have internal predecessors, (608), 72 states have call successors, (72), 25 states have call predecessors, (72), 24 states have return successors, (102), 67 states have call predecessors, (102), 70 states have call successors, (102) [2023-11-21 22:26:27,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 782 transitions. [2023-11-21 22:26:27,403 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 782 transitions. Word has length 53 [2023-11-21 22:26:27,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:27,404 INFO L495 AbstractCegarLoop]: Abstraction has 516 states and 782 transitions. [2023-11-21 22:26:27,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 5 states have internal predecessors, (42), 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) [2023-11-21 22:26:27,404 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 782 transitions. [2023-11-21 22:26:27,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-21 22:26:27,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:27,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:27,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:26:27,408 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:27,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:27,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1807797417, now seen corresponding path program 1 times [2023-11-21 22:26:27,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:27,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102168541] [2023-11-21 22:26:27,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:27,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:27,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:26:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:27,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:26:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:27,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:26:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:27,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-21 22:26:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:27,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-21 22:26:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:27,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 22:26:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:27,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:26:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:27,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-21 22:26:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:26:27,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:27,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102168541] [2023-11-21 22:26:27,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102168541] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:26:27,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708992801] [2023-11-21 22:26:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:27,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:27,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:26:27,783 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:26:27,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:26:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:27,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:26:28,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:26:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-21 22:26:28,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:26:28,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708992801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:28,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:26:28,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 22:26:28,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321405873] [2023-11-21 22:26:28,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:28,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:26:28,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:28,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:26:28,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:26:28,068 INFO L87 Difference]: Start difference. First operand 516 states and 782 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:26:28,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:28,279 INFO L93 Difference]: Finished difference Result 1523 states and 2371 transitions. [2023-11-21 22:26:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:26:28,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 103 [2023-11-21 22:26:28,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:28,287 INFO L225 Difference]: With dead ends: 1523 [2023-11-21 22:26:28,288 INFO L226 Difference]: Without dead ends: 1013 [2023-11-21 22:26:28,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:26:28,292 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 185 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:28,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 341 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:26:28,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2023-11-21 22:26:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1005. [2023-11-21 22:26:28,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 822 states have (on average 1.4452554744525548) internal successors, (1188), 830 states have internal predecessors, (1188), 134 states have call successors, (134), 49 states have call predecessors, (134), 48 states have return successors, (193), 126 states have call predecessors, (193), 132 states have call successors, (193) [2023-11-21 22:26:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1515 transitions. [2023-11-21 22:26:28,467 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1515 transitions. Word has length 103 [2023-11-21 22:26:28,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:28,467 INFO L495 AbstractCegarLoop]: Abstraction has 1005 states and 1515 transitions. [2023-11-21 22:26:28,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:26:28,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1515 transitions. [2023-11-21 22:26:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-21 22:26:28,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:28,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:28,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 22:26:28,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:28,699 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:28,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:28,700 INFO L85 PathProgramCache]: Analyzing trace with hash -77525013, now seen corresponding path program 1 times [2023-11-21 22:26:28,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:28,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250587105] [2023-11-21 22:26:28,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:28,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:28,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:26:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:28,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:26:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:28,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:26:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:29,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-21 22:26:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:29,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-21 22:26:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:29,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 22:26:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:29,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:26:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:29,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-21 22:26:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:26:29,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:29,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250587105] [2023-11-21 22:26:29,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250587105] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:26:29,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267800541] [2023-11-21 22:26:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:29,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:29,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:26:29,058 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:26:29,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:26:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:29,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:26:29,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:26:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-21 22:26:29,329 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:26:29,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267800541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:29,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:26:29,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 22:26:29,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168953345] [2023-11-21 22:26:29,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:29,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:26:29,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:29,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:26:29,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:26:29,332 INFO L87 Difference]: Start difference. First operand 1005 states and 1515 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:26:29,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:29,682 INFO L93 Difference]: Finished difference Result 2978 states and 4607 transitions. [2023-11-21 22:26:29,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:26:29,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 103 [2023-11-21 22:26:29,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:29,701 INFO L225 Difference]: With dead ends: 2978 [2023-11-21 22:26:29,702 INFO L226 Difference]: Without dead ends: 1979 [2023-11-21 22:26:29,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:26:29,710 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 176 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:29,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 341 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:26:29,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2023-11-21 22:26:29,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1967. [2023-11-21 22:26:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1616 states have (on average 1.438118811881188) internal successors, (2324), 1630 states have internal predecessors, (2324), 254 states have call successors, (254), 97 states have call predecessors, (254), 96 states have return successors, (368), 240 states have call predecessors, (368), 252 states have call successors, (368) [2023-11-21 22:26:29,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 2946 transitions. [2023-11-21 22:26:29,990 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 2946 transitions. Word has length 103 [2023-11-21 22:26:29,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:29,991 INFO L495 AbstractCegarLoop]: Abstraction has 1967 states and 2946 transitions. [2023-11-21 22:26:29,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:26:29,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 2946 transitions. [2023-11-21 22:26:29,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-21 22:26:29,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:29,998 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:30,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:26:30,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-21 22:26:30,224 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:30,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:30,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1786398103, now seen corresponding path program 1 times [2023-11-21 22:26:30,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:30,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904525615] [2023-11-21 22:26:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:30,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:30,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:26:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:30,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:26:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:30,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:26:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:30,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-21 22:26:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:30,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-21 22:26:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:30,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 22:26:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:30,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:26:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:30,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-21 22:26:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:26:30,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:30,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904525615] [2023-11-21 22:26:30,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904525615] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:26:30,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297082147] [2023-11-21 22:26:30,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:30,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:26:30,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:26:30,563 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:26:30,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:26:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:30,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:26:30,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:26:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 22:26:30,813 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:26:30,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297082147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:30,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:26:30,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 22:26:30,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817757875] [2023-11-21 22:26:30,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:30,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:26:30,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:30,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:26:30,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:26:30,818 INFO L87 Difference]: Start difference. First operand 1967 states and 2946 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:26:31,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:31,322 INFO L93 Difference]: Finished difference Result 5840 states and 8967 transitions. [2023-11-21 22:26:31,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:26:31,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 103 [2023-11-21 22:26:31,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:31,352 INFO L225 Difference]: With dead ends: 5840 [2023-11-21 22:26:31,352 INFO L226 Difference]: Without dead ends: 3879 [2023-11-21 22:26:31,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:26:31,364 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 182 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:31,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 341 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:26:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2023-11-21 22:26:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 3859. [2023-11-21 22:26:31,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3859 states, 3180 states have (on average 1.430188679245283) internal successors, (4548), 3206 states have internal predecessors, (4548), 486 states have call successors, (486), 193 states have call predecessors, (486), 192 states have return successors, (704), 460 states have call predecessors, (704), 484 states have call successors, (704) [2023-11-21 22:26:31,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3859 states to 3859 states and 5738 transitions. [2023-11-21 22:26:31,944 INFO L78 Accepts]: Start accepts. Automaton has 3859 states and 5738 transitions. Word has length 103 [2023-11-21 22:26:31,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:31,945 INFO L495 AbstractCegarLoop]: Abstraction has 3859 states and 5738 transitions. [2023-11-21 22:26:31,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:26:31,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3859 states and 5738 transitions. [2023-11-21 22:26:31,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-21 22:26:31,954 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:31,955 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:31,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:26:32,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4c936fe-d8e2-4f6d-8d8d-38ad18f91f36/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-21 22:26:32,175 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:32,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:32,176 INFO L85 PathProgramCache]: Analyzing trace with hash -246149529, now seen corresponding path program 1 times [2023-11-21 22:26:32,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:32,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669066488] [2023-11-21 22:26:32,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:32,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:32,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:26:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:32,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:26:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:32,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:26:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:32,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-21 22:26:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:32,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-21 22:26:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:32,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 22:26:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:32,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:26:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:32,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-21 22:26:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-21 22:26:32,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:32,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669066488] [2023-11-21 22:26:32,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669066488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:32,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:32,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:26:32,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719380800] [2023-11-21 22:26:32,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:32,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:26:32,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:32,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:26:32,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:26:32,468 INFO L87 Difference]: Start difference. First operand 3859 states and 5738 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-21 22:26:33,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:33,865 INFO L93 Difference]: Finished difference Result 7343 states and 11137 transitions. [2023-11-21 22:26:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:26:33,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 103 [2023-11-21 22:26:33,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:33,907 INFO L225 Difference]: With dead ends: 7343 [2023-11-21 22:26:33,907 INFO L226 Difference]: Without dead ends: 4427 [2023-11-21 22:26:33,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:26:33,922 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 157 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:33,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 577 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 22:26:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4427 states. [2023-11-21 22:26:34,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4427 to 4247. [2023-11-21 22:26:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4247 states, 3552 states have (on average 1.447072072072072) internal successors, (5140), 3578 states have internal predecessors, (5140), 494 states have call successors, (494), 201 states have call predecessors, (494), 200 states have return successors, (712), 468 states have call predecessors, (712), 492 states have call successors, (712) [2023-11-21 22:26:34,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4247 states to 4247 states and 6346 transitions. [2023-11-21 22:26:34,545 INFO L78 Accepts]: Start accepts. Automaton has 4247 states and 6346 transitions. Word has length 103 [2023-11-21 22:26:34,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:34,546 INFO L495 AbstractCegarLoop]: Abstraction has 4247 states and 6346 transitions. [2023-11-21 22:26:34,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-21 22:26:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 4247 states and 6346 transitions. [2023-11-21 22:26:34,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-21 22:26:34,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:34,569 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:34,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:26:34,569 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:34,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:34,570 INFO L85 PathProgramCache]: Analyzing trace with hash 367589997, now seen corresponding path program 1 times [2023-11-21 22:26:34,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:34,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778559925] [2023-11-21 22:26:34,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:34,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:34,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:26:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:34,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:26:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:34,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:26:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:34,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-21 22:26:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:34,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-21 22:26:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:34,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 22:26:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:34,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:26:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:34,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-21 22:26:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:34,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:26:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:34,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-21 22:26:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-11-21 22:26:34,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:34,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778559925] [2023-11-21 22:26:34,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778559925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:34,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:34,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:26:34,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80828740] [2023-11-21 22:26:34,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:34,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:26:34,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:34,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:26:34,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:26:34,929 INFO L87 Difference]: Start difference. First operand 4247 states and 6346 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 22:26:36,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:36,642 INFO L93 Difference]: Finished difference Result 12592 states and 19207 transitions. [2023-11-21 22:26:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:26:36,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 139 [2023-11-21 22:26:36,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:36,704 INFO L225 Difference]: With dead ends: 12592 [2023-11-21 22:26:36,705 INFO L226 Difference]: Without dead ends: 8351 [2023-11-21 22:26:36,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:26:36,729 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 285 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:36,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 385 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 22:26:36,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8351 states. [2023-11-21 22:26:37,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8351 to 8307. [2023-11-21 22:26:37,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8307 states, 6956 states have (on average 1.43588269120184) internal successors, (9988), 7006 states have internal predecessors, (9988), 950 states have call successors, (950), 401 states have call predecessors, (950), 400 states have return successors, (1364), 900 states have call predecessors, (1364), 948 states have call successors, (1364) [2023-11-21 22:26:37,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8307 states to 8307 states and 12302 transitions. [2023-11-21 22:26:37,711 INFO L78 Accepts]: Start accepts. Automaton has 8307 states and 12302 transitions. Word has length 139 [2023-11-21 22:26:37,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:37,713 INFO L495 AbstractCegarLoop]: Abstraction has 8307 states and 12302 transitions. [2023-11-21 22:26:37,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 22:26:37,714 INFO L276 IsEmpty]: Start isEmpty. Operand 8307 states and 12302 transitions. [2023-11-21 22:26:37,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-21 22:26:37,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:37,743 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:37,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 22:26:37,744 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:37,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:37,744 INFO L85 PathProgramCache]: Analyzing trace with hash -689029205, now seen corresponding path program 1 times [2023-11-21 22:26:37,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:37,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206061594] [2023-11-21 22:26:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:37,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:37,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:26:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:37,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:26:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:37,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:26:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:37,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-21 22:26:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:37,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-21 22:26:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:37,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 22:26:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:37,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:26:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:37,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-21 22:26:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:38,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:26:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:38,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-21 22:26:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-11-21 22:26:38,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:38,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206061594] [2023-11-21 22:26:38,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206061594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:38,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:38,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:26:38,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788296065] [2023-11-21 22:26:38,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:38,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:26:38,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:38,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:26:38,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:26:38,020 INFO L87 Difference]: Start difference. First operand 8307 states and 12302 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 22:26:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:40,618 INFO L93 Difference]: Finished difference Result 24636 states and 37207 transitions. [2023-11-21 22:26:40,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:26:40,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 139 [2023-11-21 22:26:40,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:40,801 INFO L225 Difference]: With dead ends: 24636 [2023-11-21 22:26:40,802 INFO L226 Difference]: Without dead ends: 16335 [2023-11-21 22:26:40,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:26:40,832 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 287 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:40,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 385 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 22:26:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16335 states. [2023-11-21 22:26:42,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16335 to 16251. [2023-11-21 22:26:42,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16251 states, 13620 states have (on average 1.4240822320117474) internal successors, (19396), 13718 states have internal predecessors, (19396), 1830 states have call successors, (1830), 801 states have call predecessors, (1830), 800 states have return successors, (2612), 1732 states have call predecessors, (2612), 1828 states have call successors, (2612) [2023-11-21 22:26:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16251 states to 16251 states and 23838 transitions. [2023-11-21 22:26:42,788 INFO L78 Accepts]: Start accepts. Automaton has 16251 states and 23838 transitions. Word has length 139 [2023-11-21 22:26:42,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:42,789 INFO L495 AbstractCegarLoop]: Abstraction has 16251 states and 23838 transitions. [2023-11-21 22:26:42,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 22:26:42,789 INFO L276 IsEmpty]: Start isEmpty. Operand 16251 states and 23838 transitions. [2023-11-21 22:26:42,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-21 22:26:42,862 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:42,863 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:42,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 22:26:42,864 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:42,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:42,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1354226933, now seen corresponding path program 1 times [2023-11-21 22:26:42,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:42,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804585421] [2023-11-21 22:26:42,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:42,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:42,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:26:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:43,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:26:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:43,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:26:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:43,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-21 22:26:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:43,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-21 22:26:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:43,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 22:26:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:43,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:26:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:43,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-11-21 22:26:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:43,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:26:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:43,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-21 22:26:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-11-21 22:26:43,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:43,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804585421] [2023-11-21 22:26:43,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804585421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:43,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:43,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:26:43,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405321335] [2023-11-21 22:26:43,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:43,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:26:43,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:43,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:26:43,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:26:43,191 INFO L87 Difference]: Start difference. First operand 16251 states and 23838 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 22:26:46,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:46,548 INFO L93 Difference]: Finished difference Result 48196 states and 72023 transitions. [2023-11-21 22:26:46,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:26:46,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 139 [2023-11-21 22:26:46,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:46,694 INFO L225 Difference]: With dead ends: 48196 [2023-11-21 22:26:46,695 INFO L226 Difference]: Without dead ends: 31951 [2023-11-21 22:26:46,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:26:46,758 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 290 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:46,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 385 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 22:26:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31951 states. [2023-11-21 22:26:49,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31951 to 31787. [2023-11-21 22:26:49,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31787 states, 26660 states have (on average 1.4117029257314329) internal successors, (37636), 26854 states have internal predecessors, (37636), 3526 states have call successors, (3526), 1601 states have call predecessors, (3526), 1600 states have return successors, (4996), 3332 states have call predecessors, (4996), 3524 states have call successors, (4996) [2023-11-21 22:26:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31787 states to 31787 states and 46158 transitions. [2023-11-21 22:26:50,052 INFO L78 Accepts]: Start accepts. Automaton has 31787 states and 46158 transitions. Word has length 139 [2023-11-21 22:26:50,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:50,052 INFO L495 AbstractCegarLoop]: Abstraction has 31787 states and 46158 transitions. [2023-11-21 22:26:50,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 22:26:50,053 INFO L276 IsEmpty]: Start isEmpty. Operand 31787 states and 46158 transitions. [2023-11-21 22:26:50,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-21 22:26:50,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:50,142 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:50,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 22:26:50,142 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:50,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:50,143 INFO L85 PathProgramCache]: Analyzing trace with hash 9341682, now seen corresponding path program 1 times [2023-11-21 22:26:50,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:50,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467783388] [2023-11-21 22:26:50,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:50,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:50,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:26:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:50,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:26:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:50,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:26:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:50,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-21 22:26:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:50,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-21 22:26:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:50,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 22:26:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:50,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:26:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:50,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-21 22:26:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:50,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:26:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:50,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-21 22:26:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-11-21 22:26:50,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:50,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467783388] [2023-11-21 22:26:50,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467783388] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:50,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:50,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:26:50,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086303800] [2023-11-21 22:26:50,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:50,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:26:50,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:50,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:26:50,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:26:50,464 INFO L87 Difference]: Start difference. First operand 31787 states and 46158 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 22:26:55,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:55,526 INFO L93 Difference]: Finished difference Result 73875 states and 109076 transitions. [2023-11-21 22:26:55,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:26:55,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 139 [2023-11-21 22:26:55,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:55,749 INFO L225 Difference]: With dead ends: 73875 [2023-11-21 22:26:55,750 INFO L226 Difference]: Without dead ends: 49039 [2023-11-21 22:26:55,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:26:55,952 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 282 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:55,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 427 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 22:26:55,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49039 states.