./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem18_label52.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_6290797b-b81d-4a87-8ad6-b2613cc55196/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6290797b-b81d-4a87-8ad6-b2613cc55196/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_6290797b-b81d-4a87-8ad6-b2613cc55196/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6290797b-b81d-4a87-8ad6-b2613cc55196/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem18_label52.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6290797b-b81d-4a87-8ad6-b2613cc55196/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_6290797b-b81d-4a87-8ad6-b2613cc55196/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 c86f28b27b37c95b783db74817d4fadb06f837b5fa98e38e8f1b2b06f6f2fa7e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:58:34,125 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:58:34,250 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6290797b-b81d-4a87-8ad6-b2613cc55196/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:58:34,255 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:58:34,255 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:58:34,289 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:58:34,290 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:58:34,291 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:58:34,292 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:58:34,297 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:58:34,298 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:58:34,298 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:58:34,299 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:58:34,301 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:58:34,301 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:58:34,302 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:58:34,302 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:58:34,302 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:58:34,303 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:58:34,304 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:58:34,304 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:58:34,305 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:58:34,305 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:58:34,306 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:58:34,306 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:58:34,307 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:58:34,307 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:58:34,308 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:58:34,309 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:58:34,309 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:58:34,311 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:58:34,311 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:58:34,311 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:58:34,312 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:58:34,312 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:58:34,312 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:58:34,313 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:58:34,313 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:58:34,313 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:58:34,313 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:58:34,314 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:58:34,314 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:58:34,315 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_6290797b-b81d-4a87-8ad6-b2613cc55196/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6290797b-b81d-4a87-8ad6-b2613cc55196/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c86f28b27b37c95b783db74817d4fadb06f837b5fa98e38e8f1b2b06f6f2fa7e [2023-11-24 21:58:34,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:58:34,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:58:34,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:58:34,681 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:58:34,682 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:58:34,684 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6290797b-b81d-4a87-8ad6-b2613cc55196/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/eca-rers2012/Problem18_label52.c [2023-11-24 21:58:37,944 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:58:38,442 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:58:38,444 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6290797b-b81d-4a87-8ad6-b2613cc55196/sv-benchmarks/c/eca-rers2012/Problem18_label52.c [2023-11-24 21:58:38,482 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6290797b-b81d-4a87-8ad6-b2613cc55196/bin/uautomizer-verify-NlZe1sFDwI/data/ac6f3402a/815b7656b1c740b69e0e0ab014b09e6a/FLAG95db771cf [2023-11-24 21:58:38,499 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6290797b-b81d-4a87-8ad6-b2613cc55196/bin/uautomizer-verify-NlZe1sFDwI/data/ac6f3402a/815b7656b1c740b69e0e0ab014b09e6a [2023-11-24 21:58:38,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:58:38,507 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:58:38,510 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:58:38,510 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:58:38,517 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:58:38,520 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:58:38" (1/1) ... [2023-11-24 21:58:38,521 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@725ce33e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:38, skipping insertion in model container [2023-11-24 21:58:38,522 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:58:38" (1/1) ... [2023-11-24 21:58:38,650 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:58:38,917 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_6290797b-b81d-4a87-8ad6-b2613cc55196/sv-benchmarks/c/eca-rers2012/Problem18_label52.c[2002,2015] [2023-11-24 21:58:39,876 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:58:39,890 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:58:39,918 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_6290797b-b81d-4a87-8ad6-b2613cc55196/sv-benchmarks/c/eca-rers2012/Problem18_label52.c[2002,2015] [2023-11-24 21:58:40,379 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:58:40,407 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:58:40,408 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:40 WrapperNode [2023-11-24 21:58:40,408 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:58:40,410 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:58:40,410 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:58:40,410 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:58:40,420 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:40" (1/1) ... [2023-11-24 21:58:40,466 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:40" (1/1) ... [2023-11-24 21:58:40,757 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4133 [2023-11-24 21:58:40,758 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:58:40,759 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:58:40,760 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:58:40,760 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:58:40,773 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:40" (1/1) ... [2023-11-24 21:58:40,773 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:40" (1/1) ... [2023-11-24 21:58:40,804 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:40" (1/1) ... [2023-11-24 21:58:40,918 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 21:58:40,919 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:40" (1/1) ... [2023-11-24 21:58:40,919 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:40" (1/1) ... [2023-11-24 21:58:41,116 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:40" (1/1) ... [2023-11-24 21:58:41,166 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:40" (1/1) ... [2023-11-24 21:58:41,205 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:40" (1/1) ... [2023-11-24 21:58:41,219 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:40" (1/1) ... [2023-11-24 21:58:41,286 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:58:41,288 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:58:41,289 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:58:41,289 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:58:41,290 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:40" (1/1) ... [2023-11-24 21:58:41,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:58:41,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6290797b-b81d-4a87-8ad6-b2613cc55196/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:41,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6290797b-b81d-4a87-8ad6-b2613cc55196/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:58:41,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6290797b-b81d-4a87-8ad6-b2613cc55196/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:58:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:58:41,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:58:41,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:58:41,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:58:41,474 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:58:41,478 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:58:45,960 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:58:46,046 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:58:46,048 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 21:58:46,049 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:58:46 BoogieIcfgContainer [2023-11-24 21:58:46,049 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:58:46,055 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:58:46,055 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:58:46,059 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:58:46,060 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:58:38" (1/3) ... [2023-11-24 21:58:46,061 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b5d1b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:58:46, skipping insertion in model container [2023-11-24 21:58:46,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:40" (2/3) ... [2023-11-24 21:58:46,064 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b5d1b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:58:46, skipping insertion in model container [2023-11-24 21:58:46,064 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:58:46" (3/3) ... [2023-11-24 21:58:46,067 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label52.c [2023-11-24 21:58:46,090 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:58:46,090 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:58:46,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:58:46,193 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;@678d81aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:58:46,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:58:46,205 INFO L276 IsEmpty]: Start isEmpty. Operand has 695 states, 693 states have (on average 1.9942279942279941) internal successors, (1382), 694 states have internal predecessors, (1382), 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 21:58:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 21:58:46,213 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:46,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:46,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:58:46,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:46,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1038329504, now seen corresponding path program 1 times [2023-11-24 21:58:46,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:46,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345749642] [2023-11-24 21:58:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:46,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:46,477 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 21:58:46,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:46,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345749642] [2023-11-24 21:58:46,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345749642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:46,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:46,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:58:46,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135479002] [2023-11-24 21:58:46,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:46,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:58:46,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:46,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:58:46,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:58:46,540 INFO L87 Difference]: Start difference. First operand has 695 states, 693 states have (on average 1.9942279942279941) internal successors, (1382), 694 states have internal predecessors, (1382), 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 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 21:58:46,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:46,693 INFO L93 Difference]: Finished difference Result 1389 states and 2763 transitions. [2023-11-24 21:58:46,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:58:46,696 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 15 [2023-11-24 21:58:46,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:46,719 INFO L225 Difference]: With dead ends: 1389 [2023-11-24 21:58:46,719 INFO L226 Difference]: Without dead ends: 693 [2023-11-24 21:58:46,726 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 21:58:46,731 INFO L413 NwaCegarLoop]: 1317 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, 1317 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 21:58:46,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1317 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:58:46,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-11-24 21:58:46,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2023-11-24 21:58:46,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 1.903179190751445) internal successors, (1317), 692 states have internal predecessors, (1317), 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 21:58:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1317 transitions. [2023-11-24 21:58:46,850 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1317 transitions. Word has length 15 [2023-11-24 21:58:46,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:46,851 INFO L495 AbstractCegarLoop]: Abstraction has 693 states and 1317 transitions. [2023-11-24 21:58:46,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 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 21:58:46,852 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1317 transitions. [2023-11-24 21:58:46,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 21:58:46,852 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:46,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:46,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:58:46,854 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:58:46,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:46,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1758180179, now seen corresponding path program 1 times [2023-11-24 21:58:46,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:46,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600900543] [2023-11-24 21:58:46,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:46,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:46,997 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 21:58:46,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:46,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600900543] [2023-11-24 21:58:46,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600900543] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:46,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:46,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:58:46,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117164090] [2023-11-24 21:58:47,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:47,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:47,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:47,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:47,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:47,008 INFO L87 Difference]: Start difference. First operand 693 states and 1317 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 21:58:51,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:51,608 INFO L93 Difference]: Finished difference Result 2075 states and 3948 transitions. [2023-11-24 21:58:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:51,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 15 [2023-11-24 21:58:51,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:51,622 INFO L225 Difference]: With dead ends: 2075 [2023-11-24 21:58:51,622 INFO L226 Difference]: Without dead ends: 1383 [2023-11-24 21:58:51,626 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 21:58:51,628 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 760 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1994 mSolverCounterSat, 673 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 2667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 673 IncrementalHoareTripleChecker+Valid, 1994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:51,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 435 Invalid, 2667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [673 Valid, 1994 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-11-24 21:58:51,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2023-11-24 21:58:51,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1383. [2023-11-24 21:58:51,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 1.5998552821997105) internal successors, (2211), 1382 states have internal predecessors, (2211), 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 21:58:51,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2211 transitions. [2023-11-24 21:58:51,701 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2211 transitions. Word has length 15 [2023-11-24 21:58:51,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:51,702 INFO L495 AbstractCegarLoop]: Abstraction has 1383 states and 2211 transitions. [2023-11-24 21:58:51,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 21:58:51,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2211 transitions. [2023-11-24 21:58:51,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-24 21:58:51,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:51,707 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:51,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:58:51,708 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:58:51,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:51,709 INFO L85 PathProgramCache]: Analyzing trace with hash -2000599161, now seen corresponding path program 1 times [2023-11-24 21:58:51,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:51,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619338525] [2023-11-24 21:58:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:51,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:52,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:52,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619338525] [2023-11-24 21:58:52,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619338525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:52,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:52,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:58:52,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524732104] [2023-11-24 21:58:52,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:52,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:52,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:52,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:52,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:52,035 INFO L87 Difference]: Start difference. First operand 1383 states and 2211 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 21:58:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:56,428 INFO L93 Difference]: Finished difference Result 4145 states and 6630 transitions. [2023-11-24 21:58:56,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:56,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 80 [2023-11-24 21:58:56,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:56,448 INFO L225 Difference]: With dead ends: 4145 [2023-11-24 21:58:56,448 INFO L226 Difference]: Without dead ends: 2763 [2023-11-24 21:58:56,451 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 21:58:56,453 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 714 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 2620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:58:56,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 527 Invalid, 2620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 1702 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-24 21:58:56,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2023-11-24 21:58:56,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2763. [2023-11-24 21:58:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2763 states, 2762 states have (on average 1.3504706734250542) internal successors, (3730), 2762 states have internal predecessors, (3730), 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 21:58:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2763 states to 2763 states and 3730 transitions. [2023-11-24 21:58:56,543 INFO L78 Accepts]: Start accepts. Automaton has 2763 states and 3730 transitions. Word has length 80 [2023-11-24 21:58:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:56,545 INFO L495 AbstractCegarLoop]: Abstraction has 2763 states and 3730 transitions. [2023-11-24 21:58:56,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 21:58:56,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2763 states and 3730 transitions. [2023-11-24 21:58:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-11-24 21:58:56,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:56,570 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:56,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:58:56,571 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:58:56,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:56,572 INFO L85 PathProgramCache]: Analyzing trace with hash 687071200, now seen corresponding path program 1 times [2023-11-24 21:58:56,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:56,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714970311] [2023-11-24 21:58:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:56,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-24 21:58:57,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:57,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714970311] [2023-11-24 21:58:57,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714970311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:57,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:57,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:58:57,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089456996] [2023-11-24 21:58:57,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:57,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:58:57,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:57,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:58:57,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:58:57,618 INFO L87 Difference]: Start difference. First operand 2763 states and 3730 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 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 21:59:03,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:03,503 INFO L93 Difference]: Finished difference Result 6905 states and 9073 transitions. [2023-11-24 21:59:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:03,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 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 198 [2023-11-24 21:59:03,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:03,531 INFO L225 Difference]: With dead ends: 6905 [2023-11-24 21:59:03,531 INFO L226 Difference]: Without dead ends: 4143 [2023-11-24 21:59:03,536 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 21:59:03,537 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 1873 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4085 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1873 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 4275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 4085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:03,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1873 Valid, 638 Invalid, 4275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 4085 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-11-24 21:59:03,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2023-11-24 21:59:03,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 4143. [2023-11-24 21:59:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4143 states, 4142 states have (on average 1.2467407049734427) internal successors, (5164), 4142 states have internal predecessors, (5164), 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 21:59:03,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4143 states to 4143 states and 5164 transitions. [2023-11-24 21:59:03,651 INFO L78 Accepts]: Start accepts. Automaton has 4143 states and 5164 transitions. Word has length 198 [2023-11-24 21:59:03,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:03,652 INFO L495 AbstractCegarLoop]: Abstraction has 4143 states and 5164 transitions. [2023-11-24 21:59:03,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 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 21:59:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4143 states and 5164 transitions. [2023-11-24 21:59:03,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-11-24 21:59:03,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:03,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:03,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:59:03,659 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:03,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:03,660 INFO L85 PathProgramCache]: Analyzing trace with hash 593040381, now seen corresponding path program 1 times [2023-11-24 21:59:03,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:03,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602835710] [2023-11-24 21:59:03,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:03,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:04,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:04,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602835710] [2023-11-24 21:59:04,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602835710] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:04,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333833838] [2023-11-24 21:59:04,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:04,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:04,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6290797b-b81d-4a87-8ad6-b2613cc55196/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:04,536 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6290797b-b81d-4a87-8ad6-b2613cc55196/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:04,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6290797b-b81d-4a87-8ad6-b2613cc55196/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:59:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:04,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:59:04,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-24 21:59:05,349 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:59:05,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333833838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:05,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:59:05,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-24 21:59:05,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508483593] [2023-11-24 21:59:05,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:05,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:05,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:05,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:05,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:05,353 INFO L87 Difference]: Start difference. First operand 4143 states and 5164 transitions. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 2 states have internal predecessors, (302), 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 21:59:08,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:08,873 INFO L93 Difference]: Finished difference Result 11045 states and 14055 transitions. [2023-11-24 21:59:08,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:08,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 2 states have internal predecessors, (302), 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 314 [2023-11-24 21:59:08,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:08,916 INFO L225 Difference]: With dead ends: 11045 [2023-11-24 21:59:08,916 INFO L226 Difference]: Without dead ends: 6903 [2023-11-24 21:59:08,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:59:08,924 INFO L413 NwaCegarLoop]: 542 mSDtfsCounter, 398 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2332 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 2789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 2332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:08,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 548 Invalid, 2789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 2332 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-24 21:59:08,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6903 states. [2023-11-24 21:59:09,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6903 to 6213. [2023-11-24 21:59:09,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6213 states, 6212 states have (on average 1.2398583386992916) internal successors, (7702), 6212 states have internal predecessors, (7702), 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 21:59:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6213 states to 6213 states and 7702 transitions. [2023-11-24 21:59:09,081 INFO L78 Accepts]: Start accepts. Automaton has 6213 states and 7702 transitions. Word has length 314 [2023-11-24 21:59:09,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:09,084 INFO L495 AbstractCegarLoop]: Abstraction has 6213 states and 7702 transitions. [2023-11-24 21:59:09,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 2 states have internal predecessors, (302), 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 21:59:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 6213 states and 7702 transitions. [2023-11-24 21:59:09,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-11-24 21:59:09,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:09,093 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:09,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6290797b-b81d-4a87-8ad6-b2613cc55196/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:09,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6290797b-b81d-4a87-8ad6-b2613cc55196/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:09,307 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:09,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1871760783, now seen corresponding path program 1 times [2023-11-24 21:59:09,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:09,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980991959] [2023-11-24 21:59:09,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:09,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-24 21:59:09,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:09,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980991959] [2023-11-24 21:59:09,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980991959] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:09,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:09,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:09,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450316320] [2023-11-24 21:59:09,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:09,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:09,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:09,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:09,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:09,969 INFO L87 Difference]: Start difference. First operand 6213 states and 7702 transitions. Second operand has 4 states, 4 states have (on average 88.5) internal successors, (354), 3 states have internal predecessors, (354), 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 21:59:13,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:13,306 INFO L93 Difference]: Finished difference Result 13858 states and 16878 transitions. [2023-11-24 21:59:13,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:13,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 88.5) internal successors, (354), 3 states have internal predecessors, (354), 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 384 [2023-11-24 21:59:13,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:13,344 INFO L225 Difference]: With dead ends: 13858 [2023-11-24 21:59:13,345 INFO L226 Difference]: Without dead ends: 7593 [2023-11-24 21:59:13,352 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 21:59:13,353 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 529 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2591 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 2972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 2591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:13,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 634 Invalid, 2972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 2591 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-24 21:59:13,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7593 states. [2023-11-24 21:59:13,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7593 to 7593. [2023-11-24 21:59:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7593 states, 7592 states have (on average 1.1513435194942043) internal successors, (8741), 7592 states have internal predecessors, (8741), 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 21:59:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7593 states to 7593 states and 8741 transitions. [2023-11-24 21:59:13,552 INFO L78 Accepts]: Start accepts. Automaton has 7593 states and 8741 transitions. Word has length 384 [2023-11-24 21:59:13,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:13,553 INFO L495 AbstractCegarLoop]: Abstraction has 7593 states and 8741 transitions. [2023-11-24 21:59:13,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.5) internal successors, (354), 3 states have internal predecessors, (354), 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 21:59:13,554 INFO L276 IsEmpty]: Start isEmpty. Operand 7593 states and 8741 transitions. [2023-11-24 21:59:13,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2023-11-24 21:59:13,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:13,563 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:13,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:59:13,563 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:13,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:13,564 INFO L85 PathProgramCache]: Analyzing trace with hash -235424123, now seen corresponding path program 1 times [2023-11-24 21:59:13,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:13,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977817235] [2023-11-24 21:59:13,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:13,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-11-24 21:59:14,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:14,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977817235] [2023-11-24 21:59:14,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977817235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:14,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:14,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:59:14,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647389029] [2023-11-24 21:59:14,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:14,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:14,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:14,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:14,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:14,059 INFO L87 Difference]: Start difference. First operand 7593 states and 8741 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 2 states have internal predecessors, (316), 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 21:59:16,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:16,901 INFO L93 Difference]: Finished difference Result 18635 states and 21310 transitions. [2023-11-24 21:59:16,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:16,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 2 states have internal predecessors, (316), 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 399 [2023-11-24 21:59:16,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:16,951 INFO L225 Difference]: With dead ends: 18635 [2023-11-24 21:59:16,952 INFO L226 Difference]: Without dead ends: 11043 [2023-11-24 21:59:16,963 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 21:59:16,964 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 398 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1945 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:16,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 424 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1945 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-24 21:59:16,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2023-11-24 21:59:17,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 11043. [2023-11-24 21:59:17,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11043 states, 11042 states have (on average 1.1249773591740626) internal successors, (12422), 11042 states have internal predecessors, (12422), 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 21:59:17,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11043 states to 11043 states and 12422 transitions. [2023-11-24 21:59:17,210 INFO L78 Accepts]: Start accepts. Automaton has 11043 states and 12422 transitions. Word has length 399 [2023-11-24 21:59:17,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:17,211 INFO L495 AbstractCegarLoop]: Abstraction has 11043 states and 12422 transitions. [2023-11-24 21:59:17,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 2 states have internal predecessors, (316), 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 21:59:17,220 INFO L276 IsEmpty]: Start isEmpty. Operand 11043 states and 12422 transitions. [2023-11-24 21:59:17,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2023-11-24 21:59:17,227 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:17,229 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:59:17,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:59:17,229 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:17,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:17,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1549396849, now seen corresponding path program 1 times [2023-11-24 21:59:17,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:17,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169081614] [2023-11-24 21:59:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:17,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:18,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:18,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169081614] [2023-11-24 21:59:18,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169081614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:18,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:18,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:18,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895266085] [2023-11-24 21:59:18,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:18,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:18,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:18,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:18,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:18,021 INFO L87 Difference]: Start difference. First operand 11043 states and 12422 transitions. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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)