./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label33.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39707fe2-4f8f-4517-9c2f-2a23fb41bdd6/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39707fe2-4f8f-4517-9c2f-2a23fb41bdd6/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_39707fe2-4f8f-4517-9c2f-2a23fb41bdd6/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39707fe2-4f8f-4517-9c2f-2a23fb41bdd6/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label33.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39707fe2-4f8f-4517-9c2f-2a23fb41bdd6/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_39707fe2-4f8f-4517-9c2f-2a23fb41bdd6/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 0d46a049afd4ed13c191f0aef57ddac147dacce6ed0e6ba4935c5530742087d9 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:58:33,188 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:58:33,324 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39707fe2-4f8f-4517-9c2f-2a23fb41bdd6/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:58:33,335 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:58:33,337 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:58:33,369 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:58:33,369 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:58:33,370 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:58:33,372 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:58:33,379 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:58:33,379 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:58:33,381 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:58:33,381 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:58:33,383 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:58:33,383 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:58:33,384 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:58:33,384 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:58:33,385 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:58:33,385 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:58:33,387 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:58:33,387 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:58:33,388 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:58:33,388 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:58:33,389 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:58:33,389 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:58:33,389 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:58:33,390 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:58:33,391 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:58:33,391 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:58:33,392 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:58:33,393 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:58:33,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:58:33,393 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:58:33,394 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:58:33,394 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:58:33,394 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:58:33,395 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:58:33,395 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:58:33,395 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:58:33,396 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:58:33,396 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:58:33,396 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:58:33,397 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_39707fe2-4f8f-4517-9c2f-2a23fb41bdd6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39707fe2-4f8f-4517-9c2f-2a23fb41bdd6/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d46a049afd4ed13c191f0aef57ddac147dacce6ed0e6ba4935c5530742087d9 [2023-11-24 21:58:33,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:58:33,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:58:33,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:58:33,767 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:58:33,768 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:58:33,769 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39707fe2-4f8f-4517-9c2f-2a23fb41bdd6/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/eca-rers2012/Problem19_label33.c [2023-11-24 21:58:36,776 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:58:37,567 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:58:37,569 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39707fe2-4f8f-4517-9c2f-2a23fb41bdd6/sv-benchmarks/c/eca-rers2012/Problem19_label33.c [2023-11-24 21:58:37,630 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39707fe2-4f8f-4517-9c2f-2a23fb41bdd6/bin/uautomizer-verify-NlZe1sFDwI/data/66510ac54/2e16c41692f8426f87f25d92fbad4f41/FLAGfbd8bfbe4 [2023-11-24 21:58:37,646 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39707fe2-4f8f-4517-9c2f-2a23fb41bdd6/bin/uautomizer-verify-NlZe1sFDwI/data/66510ac54/2e16c41692f8426f87f25d92fbad4f41 [2023-11-24 21:58:37,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:58:37,650 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:58:37,652 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:58:37,652 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:58:37,658 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:58:37,660 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:58:37" (1/1) ... [2023-11-24 21:58:37,662 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f3af19c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:37, skipping insertion in model container [2023-11-24 21:58:37,662 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:58:37" (1/1) ... [2023-11-24 21:58:37,890 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:58:38,360 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_39707fe2-4f8f-4517-9c2f-2a23fb41bdd6/sv-benchmarks/c/eca-rers2012/Problem19_label33.c[5530,5543] [2023-11-24 21:58:40,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:58:40,358 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:58:40,385 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_39707fe2-4f8f-4517-9c2f-2a23fb41bdd6/sv-benchmarks/c/eca-rers2012/Problem19_label33.c[5530,5543] [2023-11-24 21:58:41,486 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:58:41,534 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:58:41,535 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:41 WrapperNode [2023-11-24 21:58:41,535 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:58:41,537 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:58:41,537 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:58:41,537 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:58:41,545 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:41" (1/1) ... [2023-11-24 21:58:41,678 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:41" (1/1) ... [2023-11-24 21:58:42,423 INFO L138 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9426 [2023-11-24 21:58:42,424 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:58:42,425 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:58:42,425 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:58:42,425 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:58:42,433 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:41" (1/1) ... [2023-11-24 21:58:42,434 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:41" (1/1) ... [2023-11-24 21:58:42,808 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:41" (1/1) ... [2023-11-24 21:58:43,197 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 21:58:43,197 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:41" (1/1) ... [2023-11-24 21:58:43,197 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:41" (1/1) ... [2023-11-24 21:58:43,711 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:41" (1/1) ... [2023-11-24 21:58:43,820 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:41" (1/1) ... [2023-11-24 21:58:43,860 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:41" (1/1) ... [2023-11-24 21:58:43,884 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:41" (1/1) ... [2023-11-24 21:58:44,007 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:58:44,009 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:58:44,009 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:58:44,010 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:58:44,011 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:41" (1/1) ... [2023-11-24 21:58:44,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:58:44,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39707fe2-4f8f-4517-9c2f-2a23fb41bdd6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:44,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39707fe2-4f8f-4517-9c2f-2a23fb41bdd6/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:58:44,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39707fe2-4f8f-4517-9c2f-2a23fb41bdd6/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:58:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:58:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:58:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:58:44,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:58:44,162 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:58:44,164 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:58:55,046 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:58:55,165 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:58:55,167 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 21:58:55,168 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:58:55 BoogieIcfgContainer [2023-11-24 21:58:55,169 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:58:55,175 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:58:55,175 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:58:55,178 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:58:55,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:58:37" (1/3) ... [2023-11-24 21:58:55,181 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e292bd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:58:55, skipping insertion in model container [2023-11-24 21:58:55,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:41" (2/3) ... [2023-11-24 21:58:55,182 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e292bd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:58:55, skipping insertion in model container [2023-11-24 21:58:55,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:58:55" (3/3) ... [2023-11-24 21:58:55,185 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label33.c [2023-11-24 21:58:55,208 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:58:55,208 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:58:55,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:58:55,329 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;@79abe0df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:58:55,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:58:55,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 1686 states, 1684 states have (on average 1.902019002375297) internal successors, (3203), 1685 states have internal predecessors, (3203), 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 21:58:55,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-24 21:58:55,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:55,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:55,356 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:58:55,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:55,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1208070567, now seen corresponding path program 1 times [2023-11-24 21:58:55,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:55,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61304562] [2023-11-24 21:58:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:55,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:55,612 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 21:58:55,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:55,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61304562] [2023-11-24 21:58:55,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61304562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:55,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:55,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:58:55,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710655839] [2023-11-24 21:58:55,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:55,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:58:55,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:55,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:58:55,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:58:55,659 INFO L87 Difference]: Start difference. First operand has 1686 states, 1684 states have (on average 1.902019002375297) internal successors, (3203), 1685 states have internal predecessors, (3203), 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 20.0) internal successors, (40), 2 states have internal predecessors, (40), 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 21:58:55,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:58:55,829 INFO L93 Difference]: Finished difference Result 3371 states and 6405 transitions. [2023-11-24 21:58:55,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:58:55,838 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 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 40 [2023-11-24 21:58:55,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:58:55,871 INFO L225 Difference]: With dead ends: 3371 [2023-11-24 21:58:55,872 INFO L226 Difference]: Without dead ends: 1684 [2023-11-24 21:58:55,882 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 21:58:55,887 INFO L413 NwaCegarLoop]: 3138 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, 3138 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 21:58:55,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3138 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:58:55,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2023-11-24 21:58:55,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1684. [2023-11-24 21:58:56,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 1.8645276292335116) internal successors, (3138), 1683 states have internal predecessors, (3138), 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 21:58:56,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 3138 transitions. [2023-11-24 21:58:56,012 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 3138 transitions. Word has length 40 [2023-11-24 21:58:56,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:58:56,013 INFO L495 AbstractCegarLoop]: Abstraction has 1684 states and 3138 transitions. [2023-11-24 21:58:56,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 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 21:58:56,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 3138 transitions. [2023-11-24 21:58:56,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-24 21:58:56,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:58:56,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:58:56,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:58:56,016 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:58:56,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:56,017 INFO L85 PathProgramCache]: Analyzing trace with hash -2093872432, now seen corresponding path program 1 times [2023-11-24 21:58:56,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:56,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012466926] [2023-11-24 21:58:56,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:56,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:56,259 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 21:58:56,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:56,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012466926] [2023-11-24 21:58:56,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012466926] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:56,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:56,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:58:56,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073716857] [2023-11-24 21:58:56,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:56,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:56,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:56,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:56,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:56,263 INFO L87 Difference]: Start difference. First operand 1684 states and 3138 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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 21:59:06,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:06,182 INFO L93 Difference]: Finished difference Result 4789 states and 8995 transitions. [2023-11-24 21:59:06,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:06,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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 40 [2023-11-24 21:59:06,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:06,204 INFO L225 Difference]: With dead ends: 4789 [2023-11-24 21:59:06,205 INFO L226 Difference]: Without dead ends: 3106 [2023-11-24 21:59:06,208 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 21:59:06,209 INFO L413 NwaCegarLoop]: 1212 mSDtfsCounter, 1508 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4579 mSolverCounterSat, 1050 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 5629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1050 IncrementalHoareTripleChecker+Valid, 4579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:06,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1508 Valid, 1390 Invalid, 5629 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1050 Valid, 4579 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2023-11-24 21:59:06,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2023-11-24 21:59:06,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 3105. [2023-11-24 21:59:06,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3105 states, 3104 states have (on average 1.653028350515464) internal successors, (5131), 3104 states have internal predecessors, (5131), 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 21:59:06,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3105 states to 3105 states and 5131 transitions. [2023-11-24 21:59:06,310 INFO L78 Accepts]: Start accepts. Automaton has 3105 states and 5131 transitions. Word has length 40 [2023-11-24 21:59:06,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:06,311 INFO L495 AbstractCegarLoop]: Abstraction has 3105 states and 5131 transitions. [2023-11-24 21:59:06,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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 21:59:06,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3105 states and 5131 transitions. [2023-11-24 21:59:06,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-24 21:59:06,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:06,318 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:06,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:59:06,319 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:06,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:06,330 INFO L85 PathProgramCache]: Analyzing trace with hash 896618123, now seen corresponding path program 1 times [2023-11-24 21:59:06,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:06,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596347547] [2023-11-24 21:59:06,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:06,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:06,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:06,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596347547] [2023-11-24 21:59:06,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596347547] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:06,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:06,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:59:06,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334417014] [2023-11-24 21:59:06,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:06,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:59:06,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:06,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:59:06,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:59:06,822 INFO L87 Difference]: Start difference. First operand 3105 states and 5131 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 21:59:25,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:59:25,279 INFO L93 Difference]: Finished difference Result 10390 states and 16942 transitions. [2023-11-24 21:59:25,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:59:25,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 109 [2023-11-24 21:59:25,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:59:25,329 INFO L225 Difference]: With dead ends: 10390 [2023-11-24 21:59:25,329 INFO L226 Difference]: Without dead ends: 7286 [2023-11-24 21:59:25,336 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 21:59:25,337 INFO L413 NwaCegarLoop]: 1840 mSDtfsCounter, 4207 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 11123 mSolverCounterSat, 1405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4207 SdHoareTripleChecker+Valid, 2102 SdHoareTripleChecker+Invalid, 12528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1405 IncrementalHoareTripleChecker+Valid, 11123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:59:25,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4207 Valid, 2102 Invalid, 12528 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1405 Valid, 11123 Invalid, 0 Unknown, 0 Unchecked, 18.0s Time] [2023-11-24 21:59:25,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7286 states. [2023-11-24 21:59:25,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7286 to 7235. [2023-11-24 21:59:25,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7235 states, 7234 states have (on average 1.52156483273431) internal successors, (11007), 7234 states have internal predecessors, (11007), 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 21:59:25,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7235 states to 7235 states and 11007 transitions. [2023-11-24 21:59:25,562 INFO L78 Accepts]: Start accepts. Automaton has 7235 states and 11007 transitions. Word has length 109 [2023-11-24 21:59:25,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:59:25,564 INFO L495 AbstractCegarLoop]: Abstraction has 7235 states and 11007 transitions. [2023-11-24 21:59:25,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 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 21:59:25,564 INFO L276 IsEmpty]: Start isEmpty. Operand 7235 states and 11007 transitions. [2023-11-24 21:59:25,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-11-24 21:59:25,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:59:25,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:25,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:59:25,572 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:59:25,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:25,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1487313226, now seen corresponding path program 1 times [2023-11-24 21:59:25,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:25,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3034953] [2023-11-24 21:59:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:25,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms