./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label02.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_13c877fa-d07e-4c82-9cdb-c3356fd1fa27/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c877fa-d07e-4c82-9cdb-c3356fd1fa27/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_13c877fa-d07e-4c82-9cdb-c3356fd1fa27/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c877fa-d07e-4c82-9cdb-c3356fd1fa27/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c877fa-d07e-4c82-9cdb-c3356fd1fa27/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_13c877fa-d07e-4c82-9cdb-c3356fd1fa27/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 48aec8d1d241a0a7736380f3571da3a89472d426f8d78df6e318e9a8d52f121e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:40:58,991 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:40:59,056 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c877fa-d07e-4c82-9cdb-c3356fd1fa27/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:40:59,062 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:40:59,062 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:40:59,087 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:40:59,088 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:40:59,088 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:40:59,089 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:40:59,090 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:40:59,090 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:40:59,091 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:40:59,092 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:40:59,092 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:40:59,093 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:40:59,093 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:40:59,094 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:40:59,094 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:40:59,095 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:40:59,095 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:40:59,096 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:40:59,096 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:40:59,097 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:40:59,097 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:40:59,098 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:40:59,098 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:40:59,099 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:40:59,099 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:40:59,100 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:40:59,100 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:40:59,101 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:40:59,101 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:40:59,101 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:40:59,102 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:40:59,102 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:40:59,103 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:40:59,103 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:40:59,103 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:40:59,104 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:40:59,104 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:40:59,104 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:40:59,104 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:40:59,105 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_13c877fa-d07e-4c82-9cdb-c3356fd1fa27/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c877fa-d07e-4c82-9cdb-c3356fd1fa27/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48aec8d1d241a0a7736380f3571da3a89472d426f8d78df6e318e9a8d52f121e [2023-11-24 21:40:59,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:40:59,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:40:59,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:40:59,426 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:40:59,427 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:40:59,428 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c877fa-d07e-4c82-9cdb-c3356fd1fa27/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/eca-rers2012/Problem13_label02.c [2023-11-24 21:41:02,678 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:41:03,261 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:41:03,263 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c877fa-d07e-4c82-9cdb-c3356fd1fa27/sv-benchmarks/c/eca-rers2012/Problem13_label02.c [2023-11-24 21:41:03,303 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c877fa-d07e-4c82-9cdb-c3356fd1fa27/bin/uautomizer-verify-NlZe1sFDwI/data/33ac97aea/c0efdd3b415046ab8fd433333bb7fbc7/FLAGe6e028da0 [2023-11-24 21:41:03,322 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c877fa-d07e-4c82-9cdb-c3356fd1fa27/bin/uautomizer-verify-NlZe1sFDwI/data/33ac97aea/c0efdd3b415046ab8fd433333bb7fbc7 [2023-11-24 21:41:03,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:41:03,334 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:41:03,338 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:41:03,338 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:41:03,344 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:41:03,345 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:41:03" (1/1) ... [2023-11-24 21:41:03,346 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@581806e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:03, skipping insertion in model container [2023-11-24 21:41:03,347 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:41:03" (1/1) ... [2023-11-24 21:41:03,518 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:41:03,904 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_13c877fa-d07e-4c82-9cdb-c3356fd1fa27/sv-benchmarks/c/eca-rers2012/Problem13_label02.c[5671,5684] [2023-11-24 21:41:05,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:41:05,133 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:41:05,166 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_13c877fa-d07e-4c82-9cdb-c3356fd1fa27/sv-benchmarks/c/eca-rers2012/Problem13_label02.c[5671,5684] [2023-11-24 21:41:05,888 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:41:05,915 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:41:05,916 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:05 WrapperNode [2023-11-24 21:41:05,916 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:41:05,917 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:41:05,917 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:41:05,918 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:41:05,925 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:05" (1/1) ... [2023-11-24 21:41:05,999 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:05" (1/1) ... [2023-11-24 21:41:06,553 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5584 [2023-11-24 21:41:06,553 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:41:06,554 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:41:06,554 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:41:06,554 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:41:06,566 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:05" (1/1) ... [2023-11-24 21:41:06,566 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:05" (1/1) ... [2023-11-24 21:41:06,623 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:05" (1/1) ... [2023-11-24 21:41:06,836 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 21:41:06,837 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:05" (1/1) ... [2023-11-24 21:41:06,837 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:05" (1/1) ... [2023-11-24 21:41:07,070 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:05" (1/1) ... [2023-11-24 21:41:07,102 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:05" (1/1) ... [2023-11-24 21:41:07,154 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:05" (1/1) ... [2023-11-24 21:41:07,183 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:05" (1/1) ... [2023-11-24 21:41:07,296 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:41:07,298 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:41:07,298 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:41:07,299 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:41:07,302 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:05" (1/1) ... [2023-11-24 21:41:07,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:41:07,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c877fa-d07e-4c82-9cdb-c3356fd1fa27/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:41:07,338 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c877fa-d07e-4c82-9cdb-c3356fd1fa27/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:41:07,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c877fa-d07e-4c82-9cdb-c3356fd1fa27/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:41:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:41:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:41:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:41:07,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:41:07,455 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:41:07,458 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:41:15,172 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:41:15,262 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:41:15,264 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 21:41:15,265 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:41:15 BoogieIcfgContainer [2023-11-24 21:41:15,265 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:41:15,270 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:41:15,270 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:41:15,274 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:41:15,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:41:03" (1/3) ... [2023-11-24 21:41:15,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60f58aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:41:15, skipping insertion in model container [2023-11-24 21:41:15,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:41:05" (2/3) ... [2023-11-24 21:41:15,278 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60f58aac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:41:15, skipping insertion in model container [2023-11-24 21:41:15,278 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:41:15" (3/3) ... [2023-11-24 21:41:15,280 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label02.c [2023-11-24 21:41:15,308 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:41:15,308 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:41:15,411 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:41:15,419 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;@ef3bf9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:41:15,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:41:15,433 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 21:41:15,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-24 21:41:15,445 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:15,446 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] [2023-11-24 21:41:15,448 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:41:15,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:15,457 INFO L85 PathProgramCache]: Analyzing trace with hash -547071672, now seen corresponding path program 1 times [2023-11-24 21:41:15,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:15,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713459274] [2023-11-24 21:41:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:15,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:15,669 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 21:41:15,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:15,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713459274] [2023-11-24 21:41:15,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713459274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:15,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:15,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:41:15,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175161216] [2023-11-24 21:41:15,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:15,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:41:15,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:41:15,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:41:15,736 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 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 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 21:41:15,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:15,897 INFO L93 Difference]: Finished difference Result 2071 states and 3881 transitions. [2023-11-24 21:41:15,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:41:15,900 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 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 38 [2023-11-24 21:41:15,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:15,942 INFO L225 Difference]: With dead ends: 2071 [2023-11-24 21:41:15,943 INFO L226 Difference]: Without dead ends: 1034 [2023-11-24 21:41:15,954 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 [2023-11-24 21:41:15,959 INFO L413 NwaCegarLoop]: 1876 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, 1876 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 [2023-11-24 21:41:15,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1876 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:41:15,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2023-11-24 21:41:16,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1034. [2023-11-24 21:41:16,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 1.8160696999031947) internal successors, (1876), 1033 states have internal predecessors, (1876), 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 21:41:16,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1876 transitions. [2023-11-24 21:41:16,095 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1876 transitions. Word has length 38 [2023-11-24 21:41:16,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:16,096 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 1876 transitions. [2023-11-24 21:41:16,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 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 21:41:16,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1876 transitions. [2023-11-24 21:41:16,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-24 21:41:16,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:16,098 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] [2023-11-24 21:41:16,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:41:16,099 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:41:16,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:16,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1750479704, now seen corresponding path program 1 times [2023-11-24 21:41:16,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:16,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383609503] [2023-11-24 21:41:16,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:16,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:16,573 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 21:41:16,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:16,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383609503] [2023-11-24 21:41:16,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383609503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:16,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:16,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:41:16,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629759660] [2023-11-24 21:41:16,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:16,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:41:16,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:16,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:41:16,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:41:16,584 INFO L87 Difference]: Start difference. First operand 1034 states and 1876 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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 21:41:26,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:26,453 INFO L93 Difference]: Finished difference Result 3696 states and 6823 transitions. [2023-11-24 21:41:26,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:41:26,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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 38 [2023-11-24 21:41:26,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:26,479 INFO L225 Difference]: With dead ends: 3696 [2023-11-24 21:41:26,479 INFO L226 Difference]: Without dead ends: 2663 [2023-11-24 21:41:26,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:41:26,483 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 2684 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 4127 mSolverCounterSat, 1487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2684 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 5614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1487 IncrementalHoareTripleChecker+Valid, 4127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:26,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2684 Valid, 1017 Invalid, 5614 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1487 Valid, 4127 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2023-11-24 21:41:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2023-11-24 21:41:26,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 2662. [2023-11-24 21:41:26,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2661 states have (on average 1.4611048478015785) internal successors, (3888), 2661 states have internal predecessors, (3888), 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 21:41:26,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3888 transitions. [2023-11-24 21:41:26,565 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3888 transitions. Word has length 38 [2023-11-24 21:41:26,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:26,566 INFO L495 AbstractCegarLoop]: Abstraction has 2662 states and 3888 transitions. [2023-11-24 21:41:26,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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 21:41:26,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3888 transitions. [2023-11-24 21:41:26,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-24 21:41:26,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:26,573 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:41:26,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:41:26,575 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:41:26,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:26,582 INFO L85 PathProgramCache]: Analyzing trace with hash 398849616, now seen corresponding path program 1 times [2023-11-24 21:41:26,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:26,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583399789] [2023-11-24 21:41:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:26,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:41:27,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:27,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583399789] [2023-11-24 21:41:27,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583399789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:27,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:27,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:41:27,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718359623] [2023-11-24 21:41:27,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:27,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:41:27,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:27,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:41:27,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:41:27,058 INFO L87 Difference]: Start difference. First operand 2662 states and 3888 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 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 21:41:36,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:36,582 INFO L93 Difference]: Finished difference Result 7863 states and 12668 transitions. [2023-11-24 21:41:36,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:41:36,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 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 163 [2023-11-24 21:41:36,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:36,621 INFO L225 Difference]: With dead ends: 7863 [2023-11-24 21:41:36,621 INFO L226 Difference]: Without dead ends: 5989 [2023-11-24 21:41:36,625 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 [2023-11-24 21:41:36,627 INFO L413 NwaCegarLoop]: 892 mSDtfsCounter, 1717 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 5284 mSolverCounterSat, 843 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 6127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 843 IncrementalHoareTripleChecker+Valid, 5284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:36,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1717 Valid, 1066 Invalid, 6127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [843 Valid, 5284 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2023-11-24 21:41:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5989 states. [2023-11-24 21:41:36,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5989 to 5858. [2023-11-24 21:41:36,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5858 states, 5857 states have (on average 1.4452791531500768) internal successors, (8465), 5857 states have internal predecessors, (8465), 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 21:41:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5858 states to 5858 states and 8465 transitions. [2023-11-24 21:41:36,805 INFO L78 Accepts]: Start accepts. Automaton has 5858 states and 8465 transitions. Word has length 163 [2023-11-24 21:41:36,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:36,806 INFO L495 AbstractCegarLoop]: Abstraction has 5858 states and 8465 transitions. [2023-11-24 21:41:36,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 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 21:41:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 5858 states and 8465 transitions. [2023-11-24 21:41:36,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-24 21:41:36,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:36,814 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 21:41:36,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:41:36,815 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:41:36,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:36,816 INFO L85 PathProgramCache]: Analyzing trace with hash -371485884, now seen corresponding path program 1 times [2023-11-24 21:41:36,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:36,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94729408] [2023-11-24 21:41:36,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:36,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-24 21:41:37,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:37,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94729408] [2023-11-24 21:41:37,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94729408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:37,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:37,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:41:37,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306952772] [2023-11-24 21:41:37,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:37,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:37,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:37,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:37,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:37,225 INFO L87 Difference]: Start difference. First operand 5858 states and 8465 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 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 21:41:42,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:42,581 INFO L93 Difference]: Finished difference Result 15684 states and 23388 transitions. [2023-11-24 21:41:42,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:42,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 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 205 [2023-11-24 21:41:42,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:42,652 INFO L225 Difference]: With dead ends: 15684 [2023-11-24 21:41:42,652 INFO L226 Difference]: Without dead ends: 10614 [2023-11-24 21:41:42,659 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 21:41:42,660 INFO L413 NwaCegarLoop]: 782 mSDtfsCounter, 918 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 757 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 3311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 757 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:42,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 914 Invalid, 3311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [757 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-11-24 21:41:42,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10614 states. [2023-11-24 21:41:42,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10614 to 10607. [2023-11-24 21:41:42,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10607 states, 10606 states have (on average 1.3551763152932303) internal successors, (14373), 10606 states have internal predecessors, (14373), 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 21:41:42,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10607 states to 10607 states and 14373 transitions. [2023-11-24 21:41:42,897 INFO L78 Accepts]: Start accepts. Automaton has 10607 states and 14373 transitions. Word has length 205 [2023-11-24 21:41:42,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:42,898 INFO L495 AbstractCegarLoop]: Abstraction has 10607 states and 14373 transitions. [2023-11-24 21:41:42,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 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 21:41:42,898 INFO L276 IsEmpty]: Start isEmpty. Operand 10607 states and 14373 transitions. [2023-11-24 21:41:42,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-11-24 21:41:42,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:42,903 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-24 21:41:42,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:41:42,904 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:41:42,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:42,904 INFO L85 PathProgramCache]: Analyzing trace with hash 701803943, now seen corresponding path program 1 times [2023-11-24 21:41:42,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:42,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294535331] [2023-11-24 21:41:42,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:42,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-24 21:41:43,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:43,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294535331] [2023-11-24 21:41:43,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294535331] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:43,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:43,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:41:43,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907013671] [2023-11-24 21:41:43,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:43,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:43,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:43,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:43,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:43,173 INFO L87 Difference]: Start difference. First operand 10607 states and 14373 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 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 21:41:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:41:48,296 INFO L93 Difference]: Finished difference Result 28348 states and 39238 transitions. [2023-11-24 21:41:48,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:41:48,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 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 219 [2023-11-24 21:41:48,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:41:48,356 INFO L225 Difference]: With dead ends: 28348 [2023-11-24 21:41:48,356 INFO L226 Difference]: Without dead ends: 18529 [2023-11-24 21:41:48,370 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 21:41:48,371 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 907 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 2872 mSolverCounterSat, 545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 3417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 2872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:41:48,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 612 Invalid, 3417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [545 Valid, 2872 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-11-24 21:41:48,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18529 states. [2023-11-24 21:41:48,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18529 to 18522. [2023-11-24 21:41:48,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18522 states, 18521 states have (on average 1.3250364451163543) internal successors, (24541), 18521 states have internal predecessors, (24541), 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 21:41:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18522 states to 18522 states and 24541 transitions. [2023-11-24 21:41:48,987 INFO L78 Accepts]: Start accepts. Automaton has 18522 states and 24541 transitions. Word has length 219 [2023-11-24 21:41:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:41:48,987 INFO L495 AbstractCegarLoop]: Abstraction has 18522 states and 24541 transitions. [2023-11-24 21:41:48,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 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 21:41:48,989 INFO L276 IsEmpty]: Start isEmpty. Operand 18522 states and 24541 transitions. [2023-11-24 21:41:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-24 21:41:48,994 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:41:48,995 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-24 21:41:48,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:41:48,995 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:41:48,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:41:48,996 INFO L85 PathProgramCache]: Analyzing trace with hash 673486266, now seen corresponding path program 1 times [2023-11-24 21:41:48,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:41:48,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350216563] [2023-11-24 21:41:48,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:41:48,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:41:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:41:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-24 21:41:49,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:41:49,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350216563] [2023-11-24 21:41:49,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350216563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:41:49,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:41:49,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:41:49,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319779470] [2023-11-24 21:41:49,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:41:49,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:41:49,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:41:49,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:41:49,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:41:49,345 INFO L87 Difference]: Start difference. First operand 18522 states and 24541 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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)