./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label48.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6137101e-a7b6-4a27-a9d5-4c45c6ae4e79/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6137101e-a7b6-4a27-a9d5-4c45c6ae4e79/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6137101e-a7b6-4a27-a9d5-4c45c6ae4e79/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6137101e-a7b6-4a27-a9d5-4c45c6ae4e79/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label48.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6137101e-a7b6-4a27-a9d5-4c45c6ae4e79/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6137101e-a7b6-4a27-a9d5-4c45c6ae4e79/bin/uautomizer-verify-NlZe1sFDwI --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 c03a342c0e8f0bfba399e237ba210df18813842785480d8c5bf35ca28242fc9f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:05:12,059 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:05:12,161 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6137101e-a7b6-4a27-a9d5-4c45c6ae4e79/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 22:05:12,173 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:05:12,174 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:05:12,208 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:05:12,209 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:05:12,210 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:05:12,210 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:05:12,211 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:05:12,212 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:05:12,212 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:05:12,213 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:05:12,214 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:05:12,214 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:05:12,215 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:05:12,216 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 22:05:12,216 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:05:12,217 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:05:12,218 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:05:12,218 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:05:12,219 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 22:05:12,220 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:05:12,220 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 22:05:12,221 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:05:12,221 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 22:05:12,222 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:05:12,223 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:05:12,223 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:05:12,224 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:05:12,224 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:05:12,225 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:05:12,226 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:05:12,226 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:05:12,227 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 22:05:12,228 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:05:12,228 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:05:12,229 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:05:12,257 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:05:12,257 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 22:05:12,258 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:05:12,258 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:05:12,258 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_6137101e-a7b6-4a27-a9d5-4c45c6ae4e79/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6137101e-a7b6-4a27-a9d5-4c45c6ae4e79/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c03a342c0e8f0bfba399e237ba210df18813842785480d8c5bf35ca28242fc9f [2023-11-24 22:05:12,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:05:12,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:05:12,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:05:12,664 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:05:12,665 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:05:12,666 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6137101e-a7b6-4a27-a9d5-4c45c6ae4e79/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/eca-rers2012/Problem13_label48.c [2023-11-24 22:05:15,840 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:05:16,439 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:05:16,441 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6137101e-a7b6-4a27-a9d5-4c45c6ae4e79/sv-benchmarks/c/eca-rers2012/Problem13_label48.c [2023-11-24 22:05:16,478 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6137101e-a7b6-4a27-a9d5-4c45c6ae4e79/bin/uautomizer-verify-NlZe1sFDwI/data/84b215443/65e6a049e42640428c0306acc6c001d2/FLAGefe7d1753 [2023-11-24 22:05:16,500 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6137101e-a7b6-4a27-a9d5-4c45c6ae4e79/bin/uautomizer-verify-NlZe1sFDwI/data/84b215443/65e6a049e42640428c0306acc6c001d2 [2023-11-24 22:05:16,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:05:16,507 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:05:16,509 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:05:16,509 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:05:16,515 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:05:16,518 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:05:16" (1/1) ... [2023-11-24 22:05:16,519 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1479c813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:16, skipping insertion in model container [2023-11-24 22:05:16,520 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:05:16" (1/1) ... [2023-11-24 22:05:16,724 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:05:17,040 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_6137101e-a7b6-4a27-a9d5-4c45c6ae4e79/sv-benchmarks/c/eca-rers2012/Problem13_label48.c[1234,1247] [2023-11-24 22:05:18,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:05:18,256 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:05:18,272 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_6137101e-a7b6-4a27-a9d5-4c45c6ae4e79/sv-benchmarks/c/eca-rers2012/Problem13_label48.c[1234,1247] [2023-11-24 22:05:19,009 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:05:19,040 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:05:19,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:19 WrapperNode [2023-11-24 22:05:19,041 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:05:19,043 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:05:19,043 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:05:19,043 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:05:19,051 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:19" (1/1) ... [2023-11-24 22:05:19,136 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:19" (1/1) ... [2023-11-24 22:05:19,751 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5584 [2023-11-24 22:05:19,751 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:05:19,752 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:05:19,752 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:05:19,752 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:05:19,764 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:19" (1/1) ... [2023-11-24 22:05:19,765 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:19" (1/1) ... [2023-11-24 22:05:19,877 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:19" (1/1) ... [2023-11-24 22:05:20,177 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]. [2023-11-24 22:05:20,177 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:19" (1/1) ... [2023-11-24 22:05:20,177 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:19" (1/1) ... [2023-11-24 22:05:20,573 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:19" (1/1) ... [2023-11-24 22:05:20,606 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:19" (1/1) ... [2023-11-24 22:05:20,624 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:19" (1/1) ... [2023-11-24 22:05:20,645 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:19" (1/1) ... [2023-11-24 22:05:20,711 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:05:20,713 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:05:20,713 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:05:20,714 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:05:20,715 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:19" (1/1) ... [2023-11-24 22:05:20,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:05:20,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6137101e-a7b6-4a27-a9d5-4c45c6ae4e79/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:20,743 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6137101e-a7b6-4a27-a9d5-4c45c6ae4e79/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:05:20,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6137101e-a7b6-4a27-a9d5-4c45c6ae4e79/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:05:20,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:05:20,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:05:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:05:20,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:05:20,858 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:05:20,860 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:05:28,155 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:05:28,217 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:05:28,217 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 22:05:28,218 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:05:28 BoogieIcfgContainer [2023-11-24 22:05:28,218 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:05:28,221 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:05:28,222 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:05:28,225 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:05:28,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:05:16" (1/3) ... [2023-11-24 22:05:28,226 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec42a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:05:28, skipping insertion in model container [2023-11-24 22:05:28,227 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:19" (2/3) ... [2023-11-24 22:05:28,227 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec42a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:05:28, skipping insertion in model container [2023-11-24 22:05:28,227 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:05:28" (3/3) ... [2023-11-24 22:05:28,229 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label48.c [2023-11-24 22:05:28,248 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:05:28,248 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 22:05:28,327 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:05:28,334 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;@15f23871, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:05:28,334 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 22:05:28,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 1036 states, 1034 states have (on average 1.877176015473888) internal successors, (1941), 1035 states have internal predecessors, (1941), 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) [2023-11-24 22:05:28,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 22:05:28,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:28,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:05:28,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:28,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:28,358 INFO L85 PathProgramCache]: Analyzing trace with hash 326675475, now seen corresponding path program 1 times [2023-11-24 22:05:28,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:28,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539501226] [2023-11-24 22:05:28,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:28,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:28,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:28,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539501226] [2023-11-24 22:05:28,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539501226] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:28,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:28,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:05:28,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995283059] [2023-11-24 22:05:28,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:28,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:28,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:28,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:28,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:28,595 INFO L87 Difference]: Start difference. First operand has 1036 states, 1034 states have (on average 1.877176015473888) internal successors, (1941), 1035 states have internal predecessors, (1941), 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 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-11-24 22:05:34,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:34,647 INFO L93 Difference]: Finished difference Result 2911 states and 5519 transitions. [2023-11-24 22:05:34,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:34,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2023-11-24 22:05:34,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:34,688 INFO L225 Difference]: With dead ends: 2911 [2023-11-24 22:05:34,689 INFO L226 Difference]: Without dead ends: 1872 [2023-11-24 22:05:34,699 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 [2023-11-24 22:05:34,707 INFO L413 NwaCegarLoop]: 940 mSDtfsCounter, 885 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2448 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 3246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 2448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:34,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 1092 Invalid, 3246 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [798 Valid, 2448 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-11-24 22:05:34,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2023-11-24 22:05:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1858. [2023-11-24 22:05:34,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 1.5444264943457189) internal successors, (2868), 1857 states have internal predecessors, (2868), 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) [2023-11-24 22:05:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 2868 transitions. [2023-11-24 22:05:34,893 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 2868 transitions. Word has length 5 [2023-11-24 22:05:34,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:34,894 INFO L495 AbstractCegarLoop]: Abstraction has 1858 states and 2868 transitions. [2023-11-24 22:05:34,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-11-24 22:05:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 2868 transitions. [2023-11-24 22:05:34,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-24 22:05:34,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:34,898 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 22:05:34,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:05:34,899 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:34,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:34,901 INFO L85 PathProgramCache]: Analyzing trace with hash 247773310, now seen corresponding path program 1 times [2023-11-24 22:05:34,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:34,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83192300] [2023-11-24 22:05:34,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:34,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:35,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:35,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:35,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83192300] [2023-11-24 22:05:35,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83192300] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:35,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:35,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:05:35,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839485433] [2023-11-24 22:05:35,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:35,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:35,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:35,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:35,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:35,425 INFO L87 Difference]: Start difference. First operand 1858 states and 2868 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2023-11-24 22:05:41,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:41,078 INFO L93 Difference]: Finished difference Result 5316 states and 8228 transitions. [2023-11-24 22:05:41,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:41,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 77 [2023-11-24 22:05:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:41,104 INFO L225 Difference]: With dead ends: 5316 [2023-11-24 22:05:41,104 INFO L226 Difference]: Without dead ends: 3459 [2023-11-24 22:05:41,108 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 [2023-11-24 22:05:41,110 INFO L413 NwaCegarLoop]: 1037 mSDtfsCounter, 826 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 3280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:41,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 1190 Invalid, 3280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-11-24 22:05:41,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3459 states. [2023-11-24 22:05:41,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3459 to 3458. [2023-11-24 22:05:41,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3458 states, 3457 states have (on average 1.380676887474689) internal successors, (4773), 3457 states have internal predecessors, (4773), 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) [2023-11-24 22:05:41,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3458 states to 3458 states and 4773 transitions. [2023-11-24 22:05:41,221 INFO L78 Accepts]: Start accepts. Automaton has 3458 states and 4773 transitions. Word has length 77 [2023-11-24 22:05:41,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:41,222 INFO L495 AbstractCegarLoop]: Abstraction has 3458 states and 4773 transitions. [2023-11-24 22:05:41,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2023-11-24 22:05:41,223 INFO L276 IsEmpty]: Start isEmpty. Operand 3458 states and 4773 transitions. [2023-11-24 22:05:41,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-24 22:05:41,227 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:41,227 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 22:05:41,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:05:41,228 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:41,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:41,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1417229941, now seen corresponding path program 1 times [2023-11-24 22:05:41,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:41,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48366690] [2023-11-24 22:05:41,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:41,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:41,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:41,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48366690] [2023-11-24 22:05:41,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48366690] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:41,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:41,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:05:41,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567075636] [2023-11-24 22:05:41,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:41,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:05:41,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:41,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:05:41,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:05:41,724 INFO L87 Difference]: Start difference. First operand 3458 states and 4773 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 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) [2023-11-24 22:05:48,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:48,798 INFO L93 Difference]: Finished difference Result 10869 states and 14767 transitions. [2023-11-24 22:05:48,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:05:48,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 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 91 [2023-11-24 22:05:48,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:48,840 INFO L225 Difference]: With dead ends: 10869 [2023-11-24 22:05:48,840 INFO L226 Difference]: Without dead ends: 7412 [2023-11-24 22:05:48,846 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 [2023-11-24 22:05:48,847 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 2581 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 4118 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2581 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 4949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 4118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:48,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2581 Valid, 1001 Invalid, 4949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 4118 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-11-24 22:05:48,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7412 states. [2023-11-24 22:05:48,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7412 to 7411. [2023-11-24 22:05:49,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7411 states, 7410 states have (on average 1.269905533063428) internal successors, (9410), 7410 states have internal predecessors, (9410), 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) [2023-11-24 22:05:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7411 states to 7411 states and 9410 transitions. [2023-11-24 22:05:49,022 INFO L78 Accepts]: Start accepts. Automaton has 7411 states and 9410 transitions. Word has length 91 [2023-11-24 22:05:49,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:49,026 INFO L495 AbstractCegarLoop]: Abstraction has 7411 states and 9410 transitions. [2023-11-24 22:05:49,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 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) [2023-11-24 22:05:49,027 INFO L276 IsEmpty]: Start isEmpty. Operand 7411 states and 9410 transitions. [2023-11-24 22:05:49,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-24 22:05:49,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:49,039 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-24 22:05:49,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:05:49,039 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:49,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:49,040 INFO L85 PathProgramCache]: Analyzing trace with hash 311801849, now seen corresponding path program 1 times [2023-11-24 22:05:49,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:49,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998563335] [2023-11-24 22:05:49,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:49,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-24 22:05:49,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:49,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998563335] [2023-11-24 22:05:49,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998563335] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:49,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:49,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:05:49,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704320353] [2023-11-24 22:05:49,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:49,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:49,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:49,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:49,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:49,348 INFO L87 Difference]: Start difference. First operand 7411 states and 9410 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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) [2023-11-24 22:05:54,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:54,540 INFO L93 Difference]: Finished difference Result 20356 states and 26251 transitions. [2023-11-24 22:05:54,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:54,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 172 [2023-11-24 22:05:54,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:54,602 INFO L225 Difference]: With dead ends: 20356 [2023-11-24 22:05:54,602 INFO L226 Difference]: Without dead ends: 13733 [2023-11-24 22:05:54,612 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 [2023-11-24 22:05:54,613 INFO L413 NwaCegarLoop]: 849 mSDtfsCounter, 889 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2577 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 3324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 2577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:54,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 978 Invalid, 3324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 2577 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-24 22:05:54,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13733 states. [2023-11-24 22:05:54,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13733 to 12936. [2023-11-24 22:05:54,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12936 states, 12935 states have (on average 1.2152299961345188) internal successors, (15719), 12935 states have internal predecessors, (15719), 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) [2023-11-24 22:05:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12936 states to 12936 states and 15719 transitions. [2023-11-24 22:05:54,955 INFO L78 Accepts]: Start accepts. Automaton has 12936 states and 15719 transitions. Word has length 172 [2023-11-24 22:05:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:54,956 INFO L495 AbstractCegarLoop]: Abstraction has 12936 states and 15719 transitions. [2023-11-24 22:05:54,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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) [2023-11-24 22:05:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 12936 states and 15719 transitions. [2023-11-24 22:05:54,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-24 22:05:54,964 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:54,964 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-24 22:05:54,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:05:54,965 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:54,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:54,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1297162409, now seen corresponding path program 1 times [2023-11-24 22:05:54,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:54,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301925939] [2023-11-24 22:05:54,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:54,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:55,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:55,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301925939] [2023-11-24 22:05:55,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301925939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:55,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:55,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:05:55,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432325875] [2023-11-24 22:05:55,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:55,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:55,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:55,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:55,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:05:55,240 INFO L87 Difference]: Start difference. First operand 12936 states and 15719 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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) [2023-11-24 22:06:00,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:06:00,006 INFO L93 Difference]: Finished difference Result 31391 states and 39118 transitions. [2023-11-24 22:06:00,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:06:00,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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 204 [2023-11-24 22:06:00,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:06:00,057 INFO L225 Difference]: With dead ends: 31391 [2023-11-24 22:06:00,057 INFO L226 Difference]: Without dead ends: 19243 [2023-11-24 22:06:00,068 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 [2023-11-24 22:06:00,070 INFO L413 NwaCegarLoop]: 807 mSDtfsCounter, 857 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 3296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:06:00,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 924 Invalid, 3296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 2382 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-24 22:06:00,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19243 states. [2023-11-24 22:06:00,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19243 to 18446. [2023-11-24 22:06:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18446 states, 18445 states have (on average 1.20243968555164) internal successors, (22179), 18445 states have internal predecessors, (22179), 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) [2023-11-24 22:06:00,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18446 states to 18446 states and 22179 transitions. [2023-11-24 22:06:00,407 INFO L78 Accepts]: Start accepts. Automaton has 18446 states and 22179 transitions. Word has length 204 [2023-11-24 22:06:00,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:06:00,408 INFO L495 AbstractCegarLoop]: Abstraction has 18446 states and 22179 transitions. [2023-11-24 22:06:00,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 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) [2023-11-24 22:06:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 18446 states and 22179 transitions. [2023-11-24 22:06:00,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-11-24 22:06:00,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:06:00,417 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:06:00,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:06:00,418 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:06:00,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:06:00,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1419422385, now seen corresponding path program 1 times [2023-11-24 22:06:00,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:06:00,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327318156] [2023-11-24 22:06:00,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:06:00,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:06:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:06:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2023-11-24 22:06:00,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:06:00,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327318156] [2023-11-24 22:06:00,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327318156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:06:00,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:06:00,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 22:06:00,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463550741] [2023-11-24 22:06:00,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:06:00,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:06:00,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:06:00,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:06:00,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:06:00,770 INFO L87 Difference]: Start difference. First operand 18446 states and 22179 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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)