./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem15_label12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem15_label12.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme --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 a6e4197d0572096f9d487e671de9ba1541e800c13a9d5ac01008d7630fe3cd68 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:46:11,062 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:46:11,188 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:46:11,196 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:46:11,197 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:46:11,235 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:46:11,236 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:46:11,236 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:46:11,237 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:46:11,242 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:46:11,243 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:46:11,243 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:46:11,244 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:46:11,246 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:46:11,247 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:46:11,247 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:46:11,247 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:46:11,248 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:46:11,248 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:46:11,249 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:46:11,249 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:46:11,250 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:46:11,250 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:46:11,251 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:46:11,251 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:46:11,251 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:46:11,252 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:46:11,253 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:46:11,253 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:46:11,253 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:46:11,255 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:46:11,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:46:11,255 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:46:11,256 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:46:11,256 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:46:11,256 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:46:11,256 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:46:11,257 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:46:11,257 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:46:11,257 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:46:11,257 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:46:11,258 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:46:11,258 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_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6e4197d0572096f9d487e671de9ba1541e800c13a9d5ac01008d7630fe3cd68 [2023-11-26 11:46:11,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:46:11,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:46:11,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:46:11,581 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:46:11,581 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:46:11,583 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/eca-rers2012/Problem15_label12.c [2023-11-26 11:46:14,722 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:46:15,199 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:46:15,199 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/sv-benchmarks/c/eca-rers2012/Problem15_label12.c [2023-11-26 11:46:15,229 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/data/1a7b781b2/e5fb5319953846da899d64edd182c69d/FLAGee4f6168d [2023-11-26 11:46:15,252 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/data/1a7b781b2/e5fb5319953846da899d64edd182c69d [2023-11-26 11:46:15,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:46:15,256 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:46:15,258 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:46:15,258 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:46:15,271 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:46:15,272 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:46:15" (1/1) ... [2023-11-26 11:46:15,273 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@460cc852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:15, skipping insertion in model container [2023-11-26 11:46:15,273 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:46:15" (1/1) ... [2023-11-26 11:46:15,380 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:46:15,689 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_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/sv-benchmarks/c/eca-rers2012/Problem15_label12.c[7168,7181] [2023-11-26 11:46:16,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:46:16,305 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:46:16,330 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_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/sv-benchmarks/c/eca-rers2012/Problem15_label12.c[7168,7181] [2023-11-26 11:46:16,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:46:16,564 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:46:16,565 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:16 WrapperNode [2023-11-26 11:46:16,565 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:46:16,567 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:46:16,568 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:46:16,568 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:46:16,576 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:16" (1/1) ... [2023-11-26 11:46:16,625 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:16" (1/1) ... [2023-11-26 11:46:16,869 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1759 [2023-11-26 11:46:16,870 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:46:16,870 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:46:16,871 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:46:16,871 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:46:16,962 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:16" (1/1) ... [2023-11-26 11:46:16,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:16" (1/1) ... [2023-11-26 11:46:16,991 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:16" (1/1) ... [2023-11-26 11:46:17,091 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:46:17,091 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:16" (1/1) ... [2023-11-26 11:46:17,092 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:16" (1/1) ... [2023-11-26 11:46:17,175 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:16" (1/1) ... [2023-11-26 11:46:17,201 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:16" (1/1) ... [2023-11-26 11:46:17,220 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:16" (1/1) ... [2023-11-26 11:46:17,239 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:16" (1/1) ... [2023-11-26 11:46:17,269 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:46:17,270 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:46:17,270 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:46:17,270 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:46:17,271 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:16" (1/1) ... [2023-11-26 11:46:17,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:46:17,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:17,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:46:17,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:46:17,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:46:17,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:46:17,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:46:17,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:46:17,429 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:46:17,431 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:46:20,649 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:46:20,731 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:46:20,733 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:46:20,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:46:20 BoogieIcfgContainer [2023-11-26 11:46:20,734 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:46:20,737 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:46:20,737 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:46:20,740 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:46:20,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:46:15" (1/3) ... [2023-11-26 11:46:20,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f55e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:46:20, skipping insertion in model container [2023-11-26 11:46:20,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:16" (2/3) ... [2023-11-26 11:46:20,744 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f55e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:46:20, skipping insertion in model container [2023-11-26 11:46:20,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:46:20" (3/3) ... [2023-11-26 11:46:20,747 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label12.c [2023-11-26 11:46:20,768 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:46:20,768 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:46:20,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:46:20,857 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;@a97ea78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:46:20,858 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:46:20,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 362 states, 360 states have (on average 1.9111111111111112) internal successors, (688), 361 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:20,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-26 11:46:20,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:20,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:20,881 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:20,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:20,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1421136006, now seen corresponding path program 1 times [2023-11-26 11:46:20,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:20,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142243938] [2023-11-26 11:46:20,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:20,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:21,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:21,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142243938] [2023-11-26 11:46:21,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142243938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:21,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:21,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:46:21,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699874121] [2023-11-26 11:46:21,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:21,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:46:21,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:21,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:46:21,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:46:21,190 INFO L87 Difference]: Start difference. First operand has 362 states, 360 states have (on average 1.9111111111111112) internal successors, (688), 361 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:21,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:21,271 INFO L93 Difference]: Finished difference Result 723 states and 1375 transitions. [2023-11-26 11:46:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:46:21,273 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-26 11:46:21,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:21,298 INFO L225 Difference]: With dead ends: 723 [2023-11-26 11:46:21,299 INFO L226 Difference]: Without dead ends: 360 [2023-11-26 11:46:21,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:46:21,312 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:21,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 623 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:46:21,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2023-11-26 11:46:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2023-11-26 11:46:21,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.7353760445682451) internal successors, (623), 359 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 623 transitions. [2023-11-26 11:46:21,387 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 623 transitions. Word has length 58 [2023-11-26 11:46:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:21,387 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 623 transitions. [2023-11-26 11:46:21,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:21,388 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 623 transitions. [2023-11-26 11:46:21,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-26 11:46:21,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:21,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:21,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:46:21,394 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:21,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:21,395 INFO L85 PathProgramCache]: Analyzing trace with hash -844156069, now seen corresponding path program 1 times [2023-11-26 11:46:21,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:21,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926917065] [2023-11-26 11:46:21,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:21,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:21,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:21,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926917065] [2023-11-26 11:46:21,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926917065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:21,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:21,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:46:21,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289755936] [2023-11-26 11:46:21,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:21,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:21,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:21,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:21,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:21,702 INFO L87 Difference]: Start difference. First operand 360 states and 623 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:24,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:24,288 INFO L93 Difference]: Finished difference Result 1023 states and 1787 transitions. [2023-11-26 11:46:24,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:24,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-26 11:46:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:24,300 INFO L225 Difference]: With dead ends: 1023 [2023-11-26 11:46:24,300 INFO L226 Difference]: Without dead ends: 664 [2023-11-26 11:46:24,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:24,303 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 258 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:24,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 316 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-26 11:46:24,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2023-11-26 11:46:24,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 662. [2023-11-26 11:46:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.4826021180030258) internal successors, (980), 661 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:24,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 980 transitions. [2023-11-26 11:46:24,336 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 980 transitions. Word has length 58 [2023-11-26 11:46:24,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:24,337 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 980 transitions. [2023-11-26 11:46:24,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:24,338 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 980 transitions. [2023-11-26 11:46:24,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-26 11:46:24,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:24,341 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-26 11:46:24,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:46:24,341 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:24,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:24,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1448467117, now seen corresponding path program 1 times [2023-11-26 11:46:24,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:24,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312131961] [2023-11-26 11:46:24,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:24,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:24,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:24,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:24,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312131961] [2023-11-26 11:46:24,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312131961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:24,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:24,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:46:24,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315957038] [2023-11-26 11:46:24,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:24,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:24,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:24,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:24,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:24,833 INFO L87 Difference]: Start difference. First operand 662 states and 980 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:26,902 INFO L93 Difference]: Finished difference Result 1623 states and 2314 transitions. [2023-11-26 11:46:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:26,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2023-11-26 11:46:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:26,909 INFO L225 Difference]: With dead ends: 1623 [2023-11-26 11:46:26,909 INFO L226 Difference]: Without dead ends: 962 [2023-11-26 11:46:26,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:26,912 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 237 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:26,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 335 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-26 11:46:26,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2023-11-26 11:46:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 962. [2023-11-26 11:46:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 1.3631633714880333) internal successors, (1310), 961 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1310 transitions. [2023-11-26 11:46:26,950 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1310 transitions. Word has length 123 [2023-11-26 11:46:26,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:26,960 INFO L495 AbstractCegarLoop]: Abstraction has 962 states and 1310 transitions. [2023-11-26 11:46:26,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:26,961 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1310 transitions. [2023-11-26 11:46:26,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-26 11:46:26,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:26,964 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-26 11:46:26,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:46:26,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:26,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:26,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1766046512, now seen corresponding path program 1 times [2023-11-26 11:46:26,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:26,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766788836] [2023-11-26 11:46:26,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:26,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:27,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:27,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766788836] [2023-11-26 11:46:27,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766788836] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:27,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:27,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:46:27,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930885388] [2023-11-26 11:46:27,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:27,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:46:27,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:27,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:46:27,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:46:27,443 INFO L87 Difference]: Start difference. First operand 962 states and 1310 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:30,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:30,043 INFO L93 Difference]: Finished difference Result 2239 states and 3196 transitions. [2023-11-26 11:46:30,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:46:30,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2023-11-26 11:46:30,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:30,053 INFO L225 Difference]: With dead ends: 2239 [2023-11-26 11:46:30,054 INFO L226 Difference]: Without dead ends: 1577 [2023-11-26 11:46:30,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:46:30,057 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 934 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:30,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 319 Invalid, 1867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-26 11:46:30,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2023-11-26 11:46:30,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1265. [2023-11-26 11:46:30,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 1.3045886075949367) internal successors, (1649), 1264 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:30,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1649 transitions. [2023-11-26 11:46:30,095 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1649 transitions. Word has length 128 [2023-11-26 11:46:30,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:30,096 INFO L495 AbstractCegarLoop]: Abstraction has 1265 states and 1649 transitions. [2023-11-26 11:46:30,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:30,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1649 transitions. [2023-11-26 11:46:30,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-11-26 11:46:30,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:30,102 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:30,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:46:30,103 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:30,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:30,104 INFO L85 PathProgramCache]: Analyzing trace with hash -319138644, now seen corresponding path program 1 times [2023-11-26 11:46:30,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:30,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009924261] [2023-11-26 11:46:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:30,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:30,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:30,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009924261] [2023-11-26 11:46:30,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009924261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:30,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:30,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:46:30,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127389630] [2023-11-26 11:46:30,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:30,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:46:30,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:30,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:46:30,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:46:30,405 INFO L87 Difference]: Start difference. First operand 1265 states and 1649 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:34,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:34,665 INFO L93 Difference]: Finished difference Result 4669 states and 6169 transitions. [2023-11-26 11:46:34,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:46:34,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2023-11-26 11:46:34,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:34,685 INFO L225 Difference]: With dead ends: 4669 [2023-11-26 11:46:34,686 INFO L226 Difference]: Without dead ends: 3405 [2023-11-26 11:46:34,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:46:34,690 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 489 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 2239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:34,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 345 Invalid, 2239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-26 11:46:34,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3405 states. [2023-11-26 11:46:34,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3405 to 3380. [2023-11-26 11:46:34,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3380 states, 3379 states have (on average 1.2367564368156259) internal successors, (4179), 3379 states have internal predecessors, (4179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:34,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 4179 transitions. [2023-11-26 11:46:34,777 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 4179 transitions. Word has length 224 [2023-11-26 11:46:34,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:34,778 INFO L495 AbstractCegarLoop]: Abstraction has 3380 states and 4179 transitions. [2023-11-26 11:46:34,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:34,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 4179 transitions. [2023-11-26 11:46:34,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-11-26 11:46:34,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:34,784 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:34,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:46:34,784 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:34,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:34,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1095305930, now seen corresponding path program 1 times [2023-11-26 11:46:34,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:34,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042880326] [2023-11-26 11:46:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:34,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-26 11:46:35,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:35,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042880326] [2023-11-26 11:46:35,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042880326] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:35,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:35,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:46:35,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122947490] [2023-11-26 11:46:35,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:35,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:35,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:35,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:35,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:35,118 INFO L87 Difference]: Start difference. First operand 3380 states and 4179 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:37,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:37,067 INFO L93 Difference]: Finished difference Result 8562 states and 10753 transitions. [2023-11-26 11:46:37,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:37,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2023-11-26 11:46:37,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:37,098 INFO L225 Difference]: With dead ends: 8562 [2023-11-26 11:46:37,100 INFO L226 Difference]: Without dead ends: 5482 [2023-11-26 11:46:37,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:37,108 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:37,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 337 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-26 11:46:37,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5482 states. [2023-11-26 11:46:37,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5482 to 5477. [2023-11-26 11:46:37,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5477 states, 5476 states have (on average 1.168736303871439) internal successors, (6400), 5476 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5477 states to 5477 states and 6400 transitions. [2023-11-26 11:46:37,240 INFO L78 Accepts]: Start accepts. Automaton has 5477 states and 6400 transitions. Word has length 228 [2023-11-26 11:46:37,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:37,247 INFO L495 AbstractCegarLoop]: Abstraction has 5477 states and 6400 transitions. [2023-11-26 11:46:37,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 5477 states and 6400 transitions. [2023-11-26 11:46:37,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2023-11-26 11:46:37,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:37,255 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:37,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:46:37,256 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:37,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:37,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2070173006, now seen corresponding path program 1 times [2023-11-26 11:46:37,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:37,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083506934] [2023-11-26 11:46:37,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:37,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-26 11:46:38,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:38,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083506934] [2023-11-26 11:46:38,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083506934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:38,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:38,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:46:38,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341175402] [2023-11-26 11:46:38,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:38,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:38,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:38,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:38,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:38,044 INFO L87 Difference]: Start difference. First operand 5477 states and 6400 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:40,106 INFO L93 Difference]: Finished difference Result 10654 states and 12488 transitions. [2023-11-26 11:46:40,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:40,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 330 [2023-11-26 11:46:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:40,131 INFO L225 Difference]: With dead ends: 10654 [2023-11-26 11:46:40,131 INFO L226 Difference]: Without dead ends: 5477 [2023-11-26 11:46:40,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:40,138 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:40,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 357 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-26 11:46:40,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5477 states. [2023-11-26 11:46:40,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5477 to 5477. [2023-11-26 11:46:40,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5477 states, 5476 states have (on average 1.1676406135865596) internal successors, (6394), 5476 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5477 states to 5477 states and 6394 transitions. [2023-11-26 11:46:40,265 INFO L78 Accepts]: Start accepts. Automaton has 5477 states and 6394 transitions. Word has length 330 [2023-11-26 11:46:40,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:40,266 INFO L495 AbstractCegarLoop]: Abstraction has 5477 states and 6394 transitions. [2023-11-26 11:46:40,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:40,266 INFO L276 IsEmpty]: Start isEmpty. Operand 5477 states and 6394 transitions. [2023-11-26 11:46:40,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2023-11-26 11:46:40,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:40,273 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:40,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:46:40,274 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:40,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:40,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1101294837, now seen corresponding path program 1 times [2023-11-26 11:46:40,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:40,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034149718] [2023-11-26 11:46:40,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:40,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-26 11:46:40,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:40,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034149718] [2023-11-26 11:46:40,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034149718] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:40,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:40,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:46:40,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158483416] [2023-11-26 11:46:40,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:40,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:40,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:40,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:40,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:40,591 INFO L87 Difference]: Start difference. First operand 5477 states and 6394 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:43,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:43,121 INFO L93 Difference]: Finished difference Result 11850 states and 14150 transitions. [2023-11-26 11:46:43,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:43,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 345 [2023-11-26 11:46:43,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:43,153 INFO L225 Difference]: With dead ends: 11850 [2023-11-26 11:46:43,153 INFO L226 Difference]: Without dead ends: 6673 [2023-11-26 11:46:43,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:43,160 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 255 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:43,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 320 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-26 11:46:43,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6673 states. [2023-11-26 11:46:43,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6673 to 4875. [2023-11-26 11:46:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4875 states, 4874 states have (on average 1.1805498563807961) internal successors, (5754), 4874 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4875 states to 4875 states and 5754 transitions. [2023-11-26 11:46:43,297 INFO L78 Accepts]: Start accepts. Automaton has 4875 states and 5754 transitions. Word has length 345 [2023-11-26 11:46:43,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:43,298 INFO L495 AbstractCegarLoop]: Abstraction has 4875 states and 5754 transitions. [2023-11-26 11:46:43,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:43,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4875 states and 5754 transitions. [2023-11-26 11:46:43,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2023-11-26 11:46:43,307 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:43,308 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:43,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:46:43,309 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:43,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:43,309 INFO L85 PathProgramCache]: Analyzing trace with hash 254168444, now seen corresponding path program 1 times [2023-11-26 11:46:43,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:43,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998845299] [2023-11-26 11:46:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:43,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 113 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:44,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:44,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998845299] [2023-11-26 11:46:44,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998845299] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:46:44,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930073090] [2023-11-26 11:46:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:44,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:44,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:44,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:44,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:46:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:45,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:46:45,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:45,330 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:46:45,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930073090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:45,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:46:45,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-26 11:46:45,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953524611] [2023-11-26 11:46:45,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:45,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:45,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:45,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:45,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:46:45,334 INFO L87 Difference]: Start difference. First operand 4875 states and 5754 transitions. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:47,513 INFO L93 Difference]: Finished difference Result 11854 states and 14249 transitions. [2023-11-26 11:46:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 404 [2023-11-26 11:46:47,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:47,543 INFO L225 Difference]: With dead ends: 11854 [2023-11-26 11:46:47,544 INFO L226 Difference]: Without dead ends: 7279 [2023-11-26 11:46:47,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:46:47,550 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 248 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:47,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 343 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-26 11:46:47,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7279 states. [2023-11-26 11:46:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7279 to 6678. [2023-11-26 11:46:47,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6678 states, 6677 states have (on average 1.1647446457990116) internal successors, (7777), 6677 states have internal predecessors, (7777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:47,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6678 states to 6678 states and 7777 transitions. [2023-11-26 11:46:47,691 INFO L78 Accepts]: Start accepts. Automaton has 6678 states and 7777 transitions. Word has length 404 [2023-11-26 11:46:47,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:47,692 INFO L495 AbstractCegarLoop]: Abstraction has 6678 states and 7777 transitions. [2023-11-26 11:46:47,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:47,693 INFO L276 IsEmpty]: Start isEmpty. Operand 6678 states and 7777 transitions. [2023-11-26 11:46:47,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2023-11-26 11:46:47,703 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:47,704 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:47,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:46:47,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:47,911 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:47,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:47,911 INFO L85 PathProgramCache]: Analyzing trace with hash -41560337, now seen corresponding path program 1 times [2023-11-26 11:46:47,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:47,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933716042] [2023-11-26 11:46:47,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:47,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 315 proven. 39 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-26 11:46:48,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:48,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933716042] [2023-11-26 11:46:48,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933716042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:46:48,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051369772] [2023-11-26 11:46:48,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:48,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:48,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:48,661 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:48,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:46:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:48,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:46:48,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 354 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-26 11:46:50,175 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:46:50,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051369772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:50,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:46:50,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-26 11:46:50,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536710011] [2023-11-26 11:46:50,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:50,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:46:50,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:50,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:46:50,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:46:50,181 INFO L87 Difference]: Start difference. First operand 6678 states and 7777 transitions. Second operand has 4 states, 4 states have (on average 91.25) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:53,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:53,062 INFO L93 Difference]: Finished difference Result 14853 states and 17184 transitions. [2023-11-26 11:46:53,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:46:53,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 91.25) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 421 [2023-11-26 11:46:53,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:53,077 INFO L225 Difference]: With dead ends: 14853 [2023-11-26 11:46:53,077 INFO L226 Difference]: Without dead ends: 7877 [2023-11-26 11:46:53,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:46:53,085 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 316 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:53,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 392 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1764 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-26 11:46:53,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7877 states. [2023-11-26 11:46:53,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7877 to 7276. [2023-11-26 11:46:53,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7276 states, 7275 states have (on average 1.1535395189003437) internal successors, (8392), 7275 states have internal predecessors, (8392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:53,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7276 states to 7276 states and 8392 transitions. [2023-11-26 11:46:53,218 INFO L78 Accepts]: Start accepts. Automaton has 7276 states and 8392 transitions. Word has length 421 [2023-11-26 11:46:53,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:53,219 INFO L495 AbstractCegarLoop]: Abstraction has 7276 states and 8392 transitions. [2023-11-26 11:46:53,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.25) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:53,220 INFO L276 IsEmpty]: Start isEmpty. Operand 7276 states and 8392 transitions. [2023-11-26 11:46:53,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2023-11-26 11:46:53,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:53,231 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:53,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:46:53,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b60b96-c92f-4e48-8e1d-e035a7c4acbc/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:46:53,438 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:53,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:53,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1539184750, now seen corresponding path program 1 times [2023-11-26 11:46:53,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:53,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944341291] [2023-11-26 11:46:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:53,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-11-26 11:46:53,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:53,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944341291] [2023-11-26 11:46:53,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944341291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:53,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:53,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:46:53,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635629565] [2023-11-26 11:46:53,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:53,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:53,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:53,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:53,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:53,927 INFO L87 Difference]: Start difference. First operand 7276 states and 8392 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:56,010 INFO L93 Difference]: Finished difference Result 16646 states and 19472 transitions. [2023-11-26 11:46:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:56,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 435 [2023-11-26 11:46:56,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:56,028 INFO L225 Difference]: With dead ends: 16646 [2023-11-26 11:46:56,028 INFO L226 Difference]: Without dead ends: 9371 [2023-11-26 11:46:56,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:56,036 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 269 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:56,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 614 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-26 11:46:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9371 states. [2023-11-26 11:46:56,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9371 to 9070. [2023-11-26 11:46:56,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9070 states, 9069 states have (on average 1.1382732385047967) internal successors, (10323), 9069 states have internal predecessors, (10323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9070 states to 9070 states and 10323 transitions. [2023-11-26 11:46:56,185 INFO L78 Accepts]: Start accepts. Automaton has 9070 states and 10323 transitions. Word has length 435 [2023-11-26 11:46:56,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:56,190 INFO L495 AbstractCegarLoop]: Abstraction has 9070 states and 10323 transitions. [2023-11-26 11:46:56,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:56,190 INFO L276 IsEmpty]: Start isEmpty. Operand 9070 states and 10323 transitions. [2023-11-26 11:46:56,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 533 [2023-11-26 11:46:56,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:56,204 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:56,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 11:46:56,205 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:56,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:56,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1411205665, now seen corresponding path program 1 times [2023-11-26 11:46:56,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:56,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750864027] [2023-11-26 11:46:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:56,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2023-11-26 11:46:56,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:56,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750864027] [2023-11-26 11:46:56,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750864027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:56,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:56,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:46:56,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428650480] [2023-11-26 11:46:56,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:56,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:56,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:56,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:56,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:56,728 INFO L87 Difference]: Start difference. First operand 9070 states and 10323 transitions. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:59,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:59,072 INFO L93 Difference]: Finished difference Result 22324 states and 25510 transitions. [2023-11-26 11:46:59,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:59,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 532 [2023-11-26 11:46:59,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:59,103 INFO L225 Difference]: With dead ends: 22324 [2023-11-26 11:46:59,103 INFO L226 Difference]: Without dead ends: 13255 [2023-11-26 11:46:59,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:59,114 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 268 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:59,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 289 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-26 11:46:59,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13255 states. [2023-11-26 11:46:59,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13255 to 10563. [2023-11-26 11:46:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10563 states, 10562 states have (on average 1.1427759893959477) internal successors, (12070), 10562 states have internal predecessors, (12070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:59,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10563 states to 10563 states and 12070 transitions. [2023-11-26 11:46:59,304 INFO L78 Accepts]: Start accepts. Automaton has 10563 states and 12070 transitions. Word has length 532 [2023-11-26 11:46:59,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:59,305 INFO L495 AbstractCegarLoop]: Abstraction has 10563 states and 12070 transitions. [2023-11-26 11:46:59,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:46:59,306 INFO L276 IsEmpty]: Start isEmpty. Operand 10563 states and 12070 transitions. [2023-11-26 11:46:59,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2023-11-26 11:46:59,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:59,317 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:59,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 11:46:59,318 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:59,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:59,318 INFO L85 PathProgramCache]: Analyzing trace with hash 2000545029, now seen corresponding path program 1 times [2023-11-26 11:46:59,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:59,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547900760] [2023-11-26 11:46:59,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:59,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2023-11-26 11:46:59,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:59,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547900760] [2023-11-26 11:46:59,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547900760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:59,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:59,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:46:59,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106563655] [2023-11-26 11:46:59,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:59,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:59,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:59,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:59,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:59,866 INFO L87 Difference]: Start difference. First operand 10563 states and 12070 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)