./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label11.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_b5f69a9c-c7f7-4f21-bcd0-747bc7b32356/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5f69a9c-c7f7-4f21-bcd0-747bc7b32356/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5f69a9c-c7f7-4f21-bcd0-747bc7b32356/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5f69a9c-c7f7-4f21-bcd0-747bc7b32356/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5f69a9c-c7f7-4f21-bcd0-747bc7b32356/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5f69a9c-c7f7-4f21-bcd0-747bc7b32356/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c2a5ace26f36583b09a306c2edaa0573f422d931cc3959f8aefc935152706cf --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:51:43,487 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:51:43,592 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5f69a9c-c7f7-4f21-bcd0-747bc7b32356/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:51:43,602 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:51:43,603 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:51:43,655 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:51:43,657 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:51:43,658 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:51:43,660 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:51:43,665 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:51:43,665 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:51:43,666 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:51:43,667 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:51:43,669 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:51:43,670 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:51:43,670 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:51:43,671 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:51:43,671 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:51:43,671 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:51:43,672 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:51:43,672 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:51:43,673 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:51:43,673 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:51:43,674 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:51:43,674 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:51:43,688 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:51:43,688 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:51:43,689 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:51:43,689 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:51:43,689 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:51:43,690 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:51:43,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:51:43,690 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:51:43,691 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:51:43,691 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:51:43,691 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:51:43,691 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:51:43,691 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:51:43,691 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:51:43,692 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:51:43,692 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:51:43,692 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:51:43,692 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_b5f69a9c-c7f7-4f21-bcd0-747bc7b32356/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5f69a9c-c7f7-4f21-bcd0-747bc7b32356/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c2a5ace26f36583b09a306c2edaa0573f422d931cc3959f8aefc935152706cf [2023-11-26 11:51:44,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:51:44,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:51:44,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:51:44,077 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:51:44,077 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:51:44,078 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5f69a9c-c7f7-4f21-bcd0-747bc7b32356/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/eca-rers2012/Problem12_label11.c [2023-11-26 11:51:47,243 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:51:47,824 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:51:47,825 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5f69a9c-c7f7-4f21-bcd0-747bc7b32356/sv-benchmarks/c/eca-rers2012/Problem12_label11.c [2023-11-26 11:51:47,860 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5f69a9c-c7f7-4f21-bcd0-747bc7b32356/bin/uautomizer-verify-VRDe98Ueme/data/22f62cb5c/1fca50c4b3024c5ebb36713610d6371a/FLAG135e78253 [2023-11-26 11:51:47,878 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5f69a9c-c7f7-4f21-bcd0-747bc7b32356/bin/uautomizer-verify-VRDe98Ueme/data/22f62cb5c/1fca50c4b3024c5ebb36713610d6371a [2023-11-26 11:51:47,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:51:47,885 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:51:47,889 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:51:47,889 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:51:47,895 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:51:47,896 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:51:47" (1/1) ... [2023-11-26 11:51:47,897 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14455f2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:47, skipping insertion in model container [2023-11-26 11:51:47,897 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:51:47" (1/1) ... [2023-11-26 11:51:48,095 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:51:48,383 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_b5f69a9c-c7f7-4f21-bcd0-747bc7b32356/sv-benchmarks/c/eca-rers2012/Problem12_label11.c[5009,5022] [2023-11-26 11:51:49,593 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:51:49,609 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:51:49,638 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_b5f69a9c-c7f7-4f21-bcd0-747bc7b32356/sv-benchmarks/c/eca-rers2012/Problem12_label11.c[5009,5022] [2023-11-26 11:51:50,230 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:51:50,257 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:51:50,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:50 WrapperNode [2023-11-26 11:51:50,286 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:51:50,288 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:51:50,288 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:51:50,288 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:51:50,295 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:50" (1/1) ... [2023-11-26 11:51:50,361 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:50" (1/1) ... [2023-11-26 11:51:50,662 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4758 [2023-11-26 11:51:50,663 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:51:50,664 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:51:50,664 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:51:50,664 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:51:50,674 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:50" (1/1) ... [2023-11-26 11:51:50,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:50" (1/1) ... [2023-11-26 11:51:50,816 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:50" (1/1) ... [2023-11-26 11:51:50,981 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:51:50,981 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:50" (1/1) ... [2023-11-26 11:51:50,982 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:50" (1/1) ... [2023-11-26 11:51:51,127 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:50" (1/1) ... [2023-11-26 11:51:51,155 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:50" (1/1) ... [2023-11-26 11:51:51,180 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:50" (1/1) ... [2023-11-26 11:51:51,197 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:50" (1/1) ... [2023-11-26 11:51:51,270 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:51:51,271 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:51:51,272 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:51:51,272 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:51:51,273 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:50" (1/1) ... [2023-11-26 11:51:51,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:51:51,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5f69a9c-c7f7-4f21-bcd0-747bc7b32356/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:51:51,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5f69a9c-c7f7-4f21-bcd0-747bc7b32356/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:51:51,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5f69a9c-c7f7-4f21-bcd0-747bc7b32356/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:51:51,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:51:51,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:51:51,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:51:51,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:51:51,443 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:51:51,445 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:51:56,993 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:51:57,067 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:51:57,068 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:51:57,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:51:57 BoogieIcfgContainer [2023-11-26 11:51:57,070 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:51:57,074 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:51:57,074 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:51:57,078 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:51:57,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:51:47" (1/3) ... [2023-11-26 11:51:57,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab52c00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:51:57, skipping insertion in model container [2023-11-26 11:51:57,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:51:50" (2/3) ... [2023-11-26 11:51:57,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab52c00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:51:57, skipping insertion in model container [2023-11-26 11:51:57,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:51:57" (3/3) ... [2023-11-26 11:51:57,084 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label11.c [2023-11-26 11:51:57,107 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:51:57,107 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:51:57,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:51:57,197 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;@47cfd770, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:51:57,198 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:51:57,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 756 states, 754 states have (on average 1.993368700265252) internal successors, (1503), 755 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:57,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 11:51:57,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:57,217 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] [2023-11-26 11:51:57,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:57,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:57,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1237556607, now seen corresponding path program 1 times [2023-11-26 11:51:57,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:57,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470542316] [2023-11-26 11:51:57,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:57,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:57,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:57,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470542316] [2023-11-26 11:51:57,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470542316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:57,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:57,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:51:57,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370340253] [2023-11-26 11:51:57,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:57,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:51:57,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:57,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:51:57,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:51:57,488 INFO L87 Difference]: Start difference. First operand has 756 states, 754 states have (on average 1.993368700265252) internal successors, (1503), 755 states have internal predecessors, (1503), 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) [2023-11-26 11:51:57,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:51:57,583 INFO L93 Difference]: Finished difference Result 1511 states and 3005 transitions. [2023-11-26 11:51:57,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:51:57,585 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 [2023-11-26 11:51:57,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:51:57,605 INFO L225 Difference]: With dead ends: 1511 [2023-11-26 11:51:57,605 INFO L226 Difference]: Without dead ends: 754 [2023-11-26 11:51:57,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:51:57,616 INFO L413 NwaCegarLoop]: 1438 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, 1438 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:51:57,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1438 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:51:57,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2023-11-26 11:51:57,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2023-11-26 11:51:57,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 1.9096945551128819) internal successors, (1438), 753 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:51:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1438 transitions. [2023-11-26 11:51:57,700 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1438 transitions. Word has length 38 [2023-11-26 11:51:57,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:51:57,700 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1438 transitions. [2023-11-26 11:51:57,701 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) [2023-11-26 11:51:57,701 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1438 transitions. [2023-11-26 11:51:57,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 11:51:57,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:51:57,702 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] [2023-11-26 11:51:57,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:51:57,703 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:51:57,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:51:57,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2147299954, now seen corresponding path program 1 times [2023-11-26 11:51:57,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:51:57,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432836117] [2023-11-26 11:51:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:51:57,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:51:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:51:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:51:57,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:51:57,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432836117] [2023-11-26 11:51:57,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432836117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:51:57,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:51:57,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:51:57,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686646620] [2023-11-26 11:51:57,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:51:57,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:51:57,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:51:57,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:51:57,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:51:57,967 INFO L87 Difference]: Start difference. First operand 754 states and 1438 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) 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) [2023-11-26 11:52:02,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:02,786 INFO L93 Difference]: Finished difference Result 2258 states and 4311 transitions. [2023-11-26 11:52:02,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:52:02,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) 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 [2023-11-26 11:52:02,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:02,805 INFO L225 Difference]: With dead ends: 2258 [2023-11-26 11:52:02,805 INFO L226 Difference]: Without dead ends: 1505 [2023-11-26 11:52:02,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:02,812 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 754 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2441 mSolverCounterSat, 704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 3145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 2441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:02,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 84 Invalid, 3145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [704 Valid, 2441 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-26 11:52:02,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2023-11-26 11:52:02,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1505. [2023-11-26 11:52:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 1.8663563829787233) internal successors, (2807), 1504 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2807 transitions. [2023-11-26 11:52:02,867 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2807 transitions. Word has length 38 [2023-11-26 11:52:02,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:02,867 INFO L495 AbstractCegarLoop]: Abstraction has 1505 states and 2807 transitions. [2023-11-26 11:52:02,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) 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) [2023-11-26 11:52:02,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2807 transitions. [2023-11-26 11:52:02,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-26 11:52:02,871 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:02,872 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] [2023-11-26 11:52:02,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:52:02,872 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:02,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash -309817101, now seen corresponding path program 1 times [2023-11-26 11:52:02,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:02,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622900706] [2023-11-26 11:52:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:02,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:52:03,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:03,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622900706] [2023-11-26 11:52:03,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622900706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:03,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:03,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:52:03,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389611640] [2023-11-26 11:52:03,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:03,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:52:03,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:03,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:52:03,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:52:03,314 INFO L87 Difference]: Start difference. First operand 1505 states and 2807 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:10,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:10,772 INFO L93 Difference]: Finished difference Result 5270 states and 9795 transitions. [2023-11-26 11:52:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:52:10,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-11-26 11:52:10,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:10,798 INFO L225 Difference]: With dead ends: 5270 [2023-11-26 11:52:10,799 INFO L226 Difference]: Without dead ends: 3766 [2023-11-26 11:52:10,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:52:10,809 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 2309 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3613 mSolverCounterSat, 1529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2309 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 5142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1529 IncrementalHoareTripleChecker+Valid, 3613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:10,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2309 Valid, 197 Invalid, 5142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1529 Valid, 3613 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-11-26 11:52:10,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2023-11-26 11:52:10,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 3758. [2023-11-26 11:52:10,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3758 states, 3757 states have (on average 1.6055363321799307) internal successors, (6032), 3757 states have internal predecessors, (6032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:10,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3758 states to 3758 states and 6032 transitions. [2023-11-26 11:52:10,933 INFO L78 Accepts]: Start accepts. Automaton has 3758 states and 6032 transitions. Word has length 103 [2023-11-26 11:52:10,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:10,936 INFO L495 AbstractCegarLoop]: Abstraction has 3758 states and 6032 transitions. [2023-11-26 11:52:10,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:10,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3758 states and 6032 transitions. [2023-11-26 11:52:10,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-26 11:52:10,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:10,955 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] [2023-11-26 11:52:10,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:52:10,956 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:10,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:10,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1577940646, now seen corresponding path program 1 times [2023-11-26 11:52:10,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:10,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103352655] [2023-11-26 11:52:10,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:10,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:52:11,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:11,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103352655] [2023-11-26 11:52:11,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103352655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:11,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:11,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:52:11,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627175839] [2023-11-26 11:52:11,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:11,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:52:11,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:11,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:52:11,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:52:11,544 INFO L87 Difference]: Start difference. First operand 3758 states and 6032 transitions. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:17,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:17,059 INFO L93 Difference]: Finished difference Result 10558 states and 17374 transitions. [2023-11-26 11:52:17,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:52:17,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 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 199 [2023-11-26 11:52:17,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:17,098 INFO L225 Difference]: With dead ends: 10558 [2023-11-26 11:52:17,098 INFO L226 Difference]: Without dead ends: 6764 [2023-11-26 11:52:17,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:52:17,105 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 690 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3807 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 4470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 3807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:17,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 711 Invalid, 4470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 3807 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-11-26 11:52:17,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6764 states. [2023-11-26 11:52:17,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6764 to 6762. [2023-11-26 11:52:17,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6762 states, 6761 states have (on average 1.3571956811122614) internal successors, (9176), 6761 states have internal predecessors, (9176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6762 states to 6762 states and 9176 transitions. [2023-11-26 11:52:17,280 INFO L78 Accepts]: Start accepts. Automaton has 6762 states and 9176 transitions. Word has length 199 [2023-11-26 11:52:17,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:17,283 INFO L495 AbstractCegarLoop]: Abstraction has 6762 states and 9176 transitions. [2023-11-26 11:52:17,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:17,284 INFO L276 IsEmpty]: Start isEmpty. Operand 6762 states and 9176 transitions. [2023-11-26 11:52:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-11-26 11:52:17,291 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:17,292 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:17,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:52:17,292 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:17,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:17,293 INFO L85 PathProgramCache]: Analyzing trace with hash 259980789, now seen corresponding path program 1 times [2023-11-26 11:52:17,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:17,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272180632] [2023-11-26 11:52:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:17,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-11-26 11:52:17,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:17,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272180632] [2023-11-26 11:52:17,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272180632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:17,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:17,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:52:17,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938659023] [2023-11-26 11:52:17,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:17,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:52:17,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:17,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:52:17,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:17,745 INFO L87 Difference]: Start difference. First operand 6762 states and 9176 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:21,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:21,916 INFO L93 Difference]: Finished difference Result 16529 states and 23477 transitions. [2023-11-26 11:52:21,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:52:21,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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 269 [2023-11-26 11:52:21,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:21,965 INFO L225 Difference]: With dead ends: 16529 [2023-11-26 11:52:21,965 INFO L226 Difference]: Without dead ends: 9768 [2023-11-26 11:52:21,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:21,976 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2344 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 2810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:21,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 388 Invalid, 2810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2344 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-26 11:52:21,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9768 states. [2023-11-26 11:52:22,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9768 to 9766. [2023-11-26 11:52:22,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9766 states, 9765 states have (on average 1.3653865847414235) internal successors, (13333), 9765 states have internal predecessors, (13333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9766 states to 9766 states and 13333 transitions. [2023-11-26 11:52:22,220 INFO L78 Accepts]: Start accepts. Automaton has 9766 states and 13333 transitions. Word has length 269 [2023-11-26 11:52:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:22,222 INFO L495 AbstractCegarLoop]: Abstraction has 9766 states and 13333 transitions. [2023-11-26 11:52:22,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 9766 states and 13333 transitions. [2023-11-26 11:52:22,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2023-11-26 11:52:22,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:22,231 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-26 11:52:22,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:52:22,231 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:22,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:22,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1324441019, now seen corresponding path program 1 times [2023-11-26 11:52:22,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:22,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379978316] [2023-11-26 11:52:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:22,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-11-26 11:52:22,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:22,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379978316] [2023-11-26 11:52:22,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379978316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:22,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:22,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:52:22,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123799320] [2023-11-26 11:52:22,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:22,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:52:22,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:22,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:52:22,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:22,687 INFO L87 Difference]: Start difference. First operand 9766 states and 13333 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:26,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:26,580 INFO L93 Difference]: Finished difference Result 27041 states and 37584 transitions. [2023-11-26 11:52:26,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:52:26,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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 301 [2023-11-26 11:52:26,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:26,645 INFO L225 Difference]: With dead ends: 27041 [2023-11-26 11:52:26,646 INFO L226 Difference]: Without dead ends: 17276 [2023-11-26 11:52:26,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:26,659 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 697 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 860 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 2834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 860 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:26,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 425 Invalid, 2834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [860 Valid, 1974 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-26 11:52:26,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17276 states. [2023-11-26 11:52:26,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17276 to 15774. [2023-11-26 11:52:27,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15774 states, 15773 states have (on average 1.2816204907119761) internal successors, (20215), 15773 states have internal predecessors, (20215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:27,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15774 states to 15774 states and 20215 transitions. [2023-11-26 11:52:27,061 INFO L78 Accepts]: Start accepts. Automaton has 15774 states and 20215 transitions. Word has length 301 [2023-11-26 11:52:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:27,062 INFO L495 AbstractCegarLoop]: Abstraction has 15774 states and 20215 transitions. [2023-11-26 11:52:27,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:27,063 INFO L276 IsEmpty]: Start isEmpty. Operand 15774 states and 20215 transitions. [2023-11-26 11:52:27,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2023-11-26 11:52:27,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:27,075 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:52:27,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:52:27,075 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:27,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:27,076 INFO L85 PathProgramCache]: Analyzing trace with hash -380513429, now seen corresponding path program 1 times [2023-11-26 11:52:27,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:27,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549385045] [2023-11-26 11:52:27,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:27,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-26 11:52:28,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:28,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549385045] [2023-11-26 11:52:28,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549385045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:28,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:28,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:52:28,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039450581] [2023-11-26 11:52:28,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:28,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:52:28,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:28,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:52:28,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:28,657 INFO L87 Difference]: Start difference. First operand 15774 states and 20215 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:33,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:52:33,187 INFO L93 Difference]: Finished difference Result 39808 states and 52169 transitions. [2023-11-26 11:52:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:52:33,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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 380 [2023-11-26 11:52:33,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:52:33,254 INFO L225 Difference]: With dead ends: 39808 [2023-11-26 11:52:33,254 INFO L226 Difference]: Without dead ends: 24035 [2023-11-26 11:52:33,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:33,279 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 775 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 1093 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 3131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1093 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:52:33,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [775 Valid, 140 Invalid, 3131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1093 Valid, 2038 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-26 11:52:33,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24035 states. [2023-11-26 11:52:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24035 to 23284. [2023-11-26 11:52:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23284 states, 23283 states have (on average 1.3032684791478761) internal successors, (30344), 23283 states have internal predecessors, (30344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23284 states to 23284 states and 30344 transitions. [2023-11-26 11:52:33,826 INFO L78 Accepts]: Start accepts. Automaton has 23284 states and 30344 transitions. Word has length 380 [2023-11-26 11:52:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:52:33,827 INFO L495 AbstractCegarLoop]: Abstraction has 23284 states and 30344 transitions. [2023-11-26 11:52:33,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:52:33,828 INFO L276 IsEmpty]: Start isEmpty. Operand 23284 states and 30344 transitions. [2023-11-26 11:52:33,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2023-11-26 11:52:33,839 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:52:33,841 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-26 11:52:33,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 11:52:33,842 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:52:33,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:52:33,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1534073490, now seen corresponding path program 1 times [2023-11-26 11:52:33,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:52:33,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999272837] [2023-11-26 11:52:33,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:52:33,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:52:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:52:34,216 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 451 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-11-26 11:52:34,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:52:34,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999272837] [2023-11-26 11:52:34,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999272837] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:52:34,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:52:34,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:52:34,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277254966] [2023-11-26 11:52:34,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:52:34,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:52:34,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:52:34,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:52:34,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:52:34,220 INFO L87 Difference]: Start difference. First operand 23284 states and 30344 transitions. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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)