./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label18.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_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/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_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label18.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/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_359bae5c-8b68-40c3-973d-509163a962cc/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 1769997c3a7fbd6fa5c785c7d6a3a1743880ae8e7d5465ab5b4d547ad48afebf --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:53:51,207 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:53:51,316 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:53:51,322 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:53:51,325 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:53:51,363 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:53:51,365 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:53:51,366 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:53:51,367 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:53:51,372 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:53:51,372 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:53:51,373 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:53:51,374 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:53:51,375 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:53:51,376 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:53:51,376 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:53:51,377 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:53:51,377 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:53:51,378 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:53:51,378 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:53:51,379 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:53:51,379 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:53:51,380 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:53:51,380 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:53:51,381 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:53:51,381 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:53:51,382 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:53:51,382 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:53:51,383 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:53:51,383 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:53:51,385 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:53:51,385 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:53:51,385 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:53:51,386 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:53:51,386 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:53:51,386 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:53:51,386 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:53:51,387 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:53:51,387 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:53:51,387 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:53:51,387 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:53:51,388 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:53:51,388 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_359bae5c-8b68-40c3-973d-509163a962cc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1769997c3a7fbd6fa5c785c7d6a3a1743880ae8e7d5465ab5b4d547ad48afebf [2023-11-24 21:53:51,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:53:51,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:53:51,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:53:51,743 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:53:51,743 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:53:51,746 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/eca-rers2012/Problem14_label18.c [2023-11-24 21:53:54,894 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:53:55,203 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:53:55,204 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/sv-benchmarks/c/eca-rers2012/Problem14_label18.c [2023-11-24 21:53:55,219 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/data/54b3c15b2/c6b830e51b4d48fcafa1bae721b9e751/FLAG5f27b9b77 [2023-11-24 21:53:55,254 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/data/54b3c15b2/c6b830e51b4d48fcafa1bae721b9e751 [2023-11-24 21:53:55,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:53:55,265 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:53:55,269 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:53:55,269 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:53:55,275 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:53:55,276 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:53:55" (1/1) ... [2023-11-24 21:53:55,277 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@231297b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:55, skipping insertion in model container [2023-11-24 21:53:55,277 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:53:55" (1/1) ... [2023-11-24 21:53:55,375 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:53:55,546 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_359bae5c-8b68-40c3-973d-509163a962cc/sv-benchmarks/c/eca-rers2012/Problem14_label18.c[2268,2281] [2023-11-24 21:53:55,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:53:55,914 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:53:55,935 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_359bae5c-8b68-40c3-973d-509163a962cc/sv-benchmarks/c/eca-rers2012/Problem14_label18.c[2268,2281] [2023-11-24 21:53:56,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:53:56,135 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:53:56,136 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:56 WrapperNode [2023-11-24 21:53:56,136 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:53:56,137 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:53:56,138 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:53:56,138 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:53:56,147 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:56" (1/1) ... [2023-11-24 21:53:56,182 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:56" (1/1) ... [2023-11-24 21:53:56,259 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 859 [2023-11-24 21:53:56,260 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:53:56,261 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:53:56,261 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:53:56,261 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:53:56,277 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:56" (1/1) ... [2023-11-24 21:53:56,277 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:56" (1/1) ... [2023-11-24 21:53:56,293 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:56" (1/1) ... [2023-11-24 21:53:56,350 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 21:53:56,351 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:56" (1/1) ... [2023-11-24 21:53:56,351 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:56" (1/1) ... [2023-11-24 21:53:56,378 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:56" (1/1) ... [2023-11-24 21:53:56,388 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:56" (1/1) ... [2023-11-24 21:53:56,393 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:56" (1/1) ... [2023-11-24 21:53:56,401 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:56" (1/1) ... [2023-11-24 21:53:56,414 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:53:56,415 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:53:56,415 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:53:56,415 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:53:56,416 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:56" (1/1) ... [2023-11-24 21:53:56,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:53:56,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:53:56,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:53:56,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:53:56,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:53:56,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:53:56,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:53:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:53:56,591 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:53:56,593 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:53:58,114 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:53:58,174 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:53:58,174 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 21:53:58,174 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:53:58 BoogieIcfgContainer [2023-11-24 21:53:58,175 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:53:58,177 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:53:58,178 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:53:58,181 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:53:58,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:53:55" (1/3) ... [2023-11-24 21:53:58,182 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67fee80c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:53:58, skipping insertion in model container [2023-11-24 21:53:58,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:53:56" (2/3) ... [2023-11-24 21:53:58,183 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67fee80c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:53:58, skipping insertion in model container [2023-11-24 21:53:58,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:53:58" (3/3) ... [2023-11-24 21:53:58,184 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label18.c [2023-11-24 21:53:58,205 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:53:58,205 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:53:58,312 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:53:58,341 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;@44312cce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:53:58,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:53:58,348 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 181 states have (on average 1.988950276243094) internal successors, (360), 182 states have internal predecessors, (360), 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 21:53:58,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 21:53:58,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:53:58,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:58,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:53:58,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:58,378 INFO L85 PathProgramCache]: Analyzing trace with hash -210549687, now seen corresponding path program 1 times [2023-11-24 21:53:58,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:58,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479825810] [2023-11-24 21:53:58,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:58,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:58,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:58,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479825810] [2023-11-24 21:53:58,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479825810] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:58,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:58,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:53:58,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406303285] [2023-11-24 21:53:58,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:58,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:53:58,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:58,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:53:58,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:53:58,632 INFO L87 Difference]: Start difference. First operand has 183 states, 181 states have (on average 1.988950276243094) internal successors, (360), 182 states have internal predecessors, (360), 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 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 21:53:58,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:53:58,699 INFO L93 Difference]: Finished difference Result 365 states and 719 transitions. [2023-11-24 21:53:58,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:53:58,703 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 19 [2023-11-24 21:53:58,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:53:58,723 INFO L225 Difference]: With dead ends: 365 [2023-11-24 21:53:58,723 INFO L226 Difference]: Without dead ends: 181 [2023-11-24 21:53:58,728 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 21:53:58,733 INFO L413 NwaCegarLoop]: 295 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, 295 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 21:53:58,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 295 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:53:58,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-24 21:53:58,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-11-24 21:53:58,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.6388888888888888) internal successors, (295), 180 states have internal predecessors, (295), 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 21:53:58,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 295 transitions. [2023-11-24 21:53:58,809 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 295 transitions. Word has length 19 [2023-11-24 21:53:58,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:53:58,809 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 295 transitions. [2023-11-24 21:53:58,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 21:53:58,810 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 295 transitions. [2023-11-24 21:53:58,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 21:53:58,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:53:58,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:58,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:53:58,812 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:53:58,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:58,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1489560727, now seen corresponding path program 1 times [2023-11-24 21:53:58,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:58,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539047811] [2023-11-24 21:53:58,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:58,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:59,003 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 21:53:59,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:59,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539047811] [2023-11-24 21:53:59,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539047811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:59,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:59,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:53:59,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989940215] [2023-11-24 21:53:59,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:59,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:53:59,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:59,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:53:59,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:53:59,012 INFO L87 Difference]: Start difference. First operand 181 states and 295 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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 21:54:00,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:00,000 INFO L93 Difference]: Finished difference Result 539 states and 882 transitions. [2023-11-24 21:54:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:00,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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 19 [2023-11-24 21:54:00,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:00,004 INFO L225 Difference]: With dead ends: 539 [2023-11-24 21:54:00,004 INFO L226 Difference]: Without dead ends: 359 [2023-11-24 21:54:00,005 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 21:54:00,007 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 179 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:00,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 87 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 21:54:00,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-11-24 21:54:00,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2023-11-24 21:54:00,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.4217877094972067) internal successors, (509), 358 states have internal predecessors, (509), 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 21:54:00,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 509 transitions. [2023-11-24 21:54:00,030 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 509 transitions. Word has length 19 [2023-11-24 21:54:00,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:00,031 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 509 transitions. [2023-11-24 21:54:00,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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 21:54:00,032 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 509 transitions. [2023-11-24 21:54:00,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-24 21:54:00,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:00,039 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 21:54:00,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:54:00,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:00,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:00,040 INFO L85 PathProgramCache]: Analyzing trace with hash 376273120, now seen corresponding path program 1 times [2023-11-24 21:54:00,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:00,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135910006] [2023-11-24 21:54:00,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:00,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:00,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:00,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135910006] [2023-11-24 21:54:00,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135910006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:00,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:00,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:54:00,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894896790] [2023-11-24 21:54:00,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:00,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:54:00,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:00,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:54:00,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:54:00,602 INFO L87 Difference]: Start difference. First operand 359 states and 509 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 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 21:54:01,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:01,882 INFO L93 Difference]: Finished difference Result 1073 states and 1445 transitions. [2023-11-24 21:54:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:54:01,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 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 98 [2023-11-24 21:54:01,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:01,887 INFO L225 Difference]: With dead ends: 1073 [2023-11-24 21:54:01,887 INFO L226 Difference]: Without dead ends: 715 [2023-11-24 21:54:01,889 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 21:54:01,890 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 418 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:01,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 119 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 21:54:01,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2023-11-24 21:54:01,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 715. [2023-11-24 21:54:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.2619047619047619) internal successors, (901), 714 states have internal predecessors, (901), 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 21:54:01,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 901 transitions. [2023-11-24 21:54:01,920 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 901 transitions. Word has length 98 [2023-11-24 21:54:01,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:01,921 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 901 transitions. [2023-11-24 21:54:01,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 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 21:54:01,922 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 901 transitions. [2023-11-24 21:54:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-24 21:54:01,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:01,926 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 21:54:01,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:54:01,927 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:01,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:01,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1405668319, now seen corresponding path program 1 times [2023-11-24 21:54:01,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:01,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626606054] [2023-11-24 21:54:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:01,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:02,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:02,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626606054] [2023-11-24 21:54:02,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626606054] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:54:02,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086543906] [2023-11-24 21:54:02,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:02,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:02,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:54:02,281 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:54:02,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:54:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:02,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:54:02,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:54:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-24 21:54:02,705 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:54:02,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086543906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:02,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:54:02,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-24 21:54:02,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720598393] [2023-11-24 21:54:02,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:02,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:02,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:02,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:02,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:54:02,709 INFO L87 Difference]: Start difference. First operand 715 states and 901 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 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 21:54:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:03,502 INFO L93 Difference]: Finished difference Result 1251 states and 1611 transitions. [2023-11-24 21:54:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:03,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 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 124 [2023-11-24 21:54:03,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:03,511 INFO L225 Difference]: With dead ends: 1251 [2023-11-24 21:54:03,511 INFO L226 Difference]: Without dead ends: 1249 [2023-11-24 21:54:03,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:54:03,513 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 91 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:03,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 34 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 21:54:03,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2023-11-24 21:54:03,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 893. [2023-11-24 21:54:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.3374439461883407) internal successors, (1193), 892 states have internal predecessors, (1193), 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 21:54:03,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1193 transitions. [2023-11-24 21:54:03,542 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1193 transitions. Word has length 124 [2023-11-24 21:54:03,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:03,543 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1193 transitions. [2023-11-24 21:54:03,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 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 21:54:03,544 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1193 transitions. [2023-11-24 21:54:03,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-24 21:54:03,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:03,549 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:03,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 21:54:03,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:03,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:03,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:03,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1760409556, now seen corresponding path program 1 times [2023-11-24 21:54:03,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:03,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940533638] [2023-11-24 21:54:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:03,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:04,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:04,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940533638] [2023-11-24 21:54:04,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940533638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:04,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:04,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:54:04,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169664623] [2023-11-24 21:54:04,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:04,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:54:04,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:04,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:54:04,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:54:04,192 INFO L87 Difference]: Start difference. First operand 893 states and 1193 transitions. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 3 states have internal predecessors, (178), 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 21:54:05,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:05,110 INFO L93 Difference]: Finished difference Result 1992 states and 2628 transitions. [2023-11-24 21:54:05,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:54:05,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 3 states have internal predecessors, (178), 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 178 [2023-11-24 21:54:05,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:05,119 INFO L225 Difference]: With dead ends: 1992 [2023-11-24 21:54:05,119 INFO L226 Difference]: Without dead ends: 1071 [2023-11-24 21:54:05,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:54:05,125 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 116 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:05,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 116 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 21:54:05,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2023-11-24 21:54:05,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 1071. [2023-11-24 21:54:05,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 1.1803738317757009) internal successors, (1263), 1070 states have internal predecessors, (1263), 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 21:54:05,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1263 transitions. [2023-11-24 21:54:05,153 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1263 transitions. Word has length 178 [2023-11-24 21:54:05,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:05,155 INFO L495 AbstractCegarLoop]: Abstraction has 1071 states and 1263 transitions. [2023-11-24 21:54:05,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 3 states have internal predecessors, (178), 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 21:54:05,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1263 transitions. [2023-11-24 21:54:05,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-11-24 21:54:05,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:05,160 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:05,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:54:05,161 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:05,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:05,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1940874898, now seen corresponding path program 1 times [2023-11-24 21:54:05,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:05,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915654479] [2023-11-24 21:54:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:05,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 35 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:05,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:05,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915654479] [2023-11-24 21:54:05,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915654479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:54:05,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009760452] [2023-11-24 21:54:05,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:05,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:05,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:54:05,602 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:54:05,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:54:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:05,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:54:05,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:54:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-24 21:54:06,019 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:54:06,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009760452] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:06,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:54:06,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 21:54:06,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028861945] [2023-11-24 21:54:06,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:06,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:06,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:06,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:06,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:54:06,028 INFO L87 Difference]: Start difference. First operand 1071 states and 1263 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 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 21:54:06,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:06,737 INFO L93 Difference]: Finished difference Result 2319 states and 2778 transitions. [2023-11-24 21:54:06,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:06,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 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 190 [2023-11-24 21:54:06,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:06,745 INFO L225 Difference]: With dead ends: 2319 [2023-11-24 21:54:06,745 INFO L226 Difference]: Without dead ends: 1249 [2023-11-24 21:54:06,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:54:06,748 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 84 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:06,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 45 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:54:06,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2023-11-24 21:54:06,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1071. [2023-11-24 21:54:06,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 1.1672897196261682) internal successors, (1249), 1070 states have internal predecessors, (1249), 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 21:54:06,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1249 transitions. [2023-11-24 21:54:06,774 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1249 transitions. Word has length 190 [2023-11-24 21:54:06,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:06,775 INFO L495 AbstractCegarLoop]: Abstraction has 1071 states and 1249 transitions. [2023-11-24 21:54:06,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 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 21:54:06,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1249 transitions. [2023-11-24 21:54:06,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-11-24 21:54:06,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:06,778 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:06,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-24 21:54:06,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 21:54:06,985 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:06,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:06,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1090612879, now seen corresponding path program 1 times [2023-11-24 21:54:06,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:06,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361355761] [2023-11-24 21:54:06,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:06,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:54:07,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:07,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361355761] [2023-11-24 21:54:07,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361355761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:07,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:07,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:54:07,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773658172] [2023-11-24 21:54:07,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:07,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:07,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:07,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:07,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:07,311 INFO L87 Difference]: Start difference. First operand 1071 states and 1249 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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 21:54:08,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:08,066 INFO L93 Difference]: Finished difference Result 2853 states and 3361 transitions. [2023-11-24 21:54:08,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:08,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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 193 [2023-11-24 21:54:08,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:08,076 INFO L225 Difference]: With dead ends: 2853 [2023-11-24 21:54:08,076 INFO L226 Difference]: Without dead ends: 1783 [2023-11-24 21:54:08,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:08,079 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 110 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:08,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 75 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:54:08,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2023-11-24 21:54:08,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1605. [2023-11-24 21:54:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 1.1365336658354115) internal successors, (1823), 1604 states have internal predecessors, (1823), 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 21:54:08,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 1823 transitions. [2023-11-24 21:54:08,139 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 1823 transitions. Word has length 193 [2023-11-24 21:54:08,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:08,140 INFO L495 AbstractCegarLoop]: Abstraction has 1605 states and 1823 transitions. [2023-11-24 21:54:08,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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 21:54:08,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 1823 transitions. [2023-11-24 21:54:08,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-24 21:54:08,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:08,146 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:08,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:54:08,147 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:08,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:08,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2015573280, now seen corresponding path program 1 times [2023-11-24 21:54:08,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:08,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647218843] [2023-11-24 21:54:08,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:08,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2023-11-24 21:54:08,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:08,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647218843] [2023-11-24 21:54:08,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647218843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:08,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:08,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:54:08,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066786145] [2023-11-24 21:54:08,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:08,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:08,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:08,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:08,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:08,483 INFO L87 Difference]: Start difference. First operand 1605 states and 1823 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 21:54:09,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:09,165 INFO L93 Difference]: Finished difference Result 3565 states and 4150 transitions. [2023-11-24 21:54:09,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:09,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 310 [2023-11-24 21:54:09,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:09,177 INFO L225 Difference]: With dead ends: 3565 [2023-11-24 21:54:09,177 INFO L226 Difference]: Without dead ends: 2139 [2023-11-24 21:54:09,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:09,180 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 167 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:09,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 65 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:54:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2023-11-24 21:54:09,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 1783. [2023-11-24 21:54:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 1.1402918069584735) internal successors, (2032), 1782 states have internal predecessors, (2032), 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 21:54:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2032 transitions. [2023-11-24 21:54:09,284 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2032 transitions. Word has length 310 [2023-11-24 21:54:09,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:09,285 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 2032 transitions. [2023-11-24 21:54:09,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 21:54:09,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2032 transitions. [2023-11-24 21:54:09,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2023-11-24 21:54:09,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:09,298 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 2, 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] [2023-11-24 21:54:09,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:54:09,299 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:09,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:09,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1091916489, now seen corresponding path program 1 times [2023-11-24 21:54:09,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:09,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562584599] [2023-11-24 21:54:09,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:09,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2023-11-24 21:54:09,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:09,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562584599] [2023-11-24 21:54:09,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562584599] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:09,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:09,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:54:09,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121835149] [2023-11-24 21:54:09,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:09,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:54:09,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:09,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:54:09,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:54:09,872 INFO L87 Difference]: Start difference. First operand 1783 states and 2032 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 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 21:54:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:10,679 INFO L93 Difference]: Finished difference Result 3594 states and 4115 transitions. [2023-11-24 21:54:10,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:54:10,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 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 389 [2023-11-24 21:54:10,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:10,691 INFO L225 Difference]: With dead ends: 3594 [2023-11-24 21:54:10,691 INFO L226 Difference]: Without dead ends: 1961 [2023-11-24 21:54:10,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:54:10,697 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 141 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:10,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 14 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 21:54:10,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2023-11-24 21:54:10,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1783. [2023-11-24 21:54:10,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 1.0897867564534232) internal successors, (1942), 1782 states have internal predecessors, (1942), 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 21:54:10,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 1942 transitions. [2023-11-24 21:54:10,744 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 1942 transitions. Word has length 389 [2023-11-24 21:54:10,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:10,744 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 1942 transitions. [2023-11-24 21:54:10,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 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 21:54:10,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 1942 transitions. [2023-11-24 21:54:10,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2023-11-24 21:54:10,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:10,753 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:10,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:54:10,753 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:10,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:10,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1014097730, now seen corresponding path program 1 times [2023-11-24 21:54:10,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:10,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114522352] [2023-11-24 21:54:10,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:10,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-24 21:54:11,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:11,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114522352] [2023-11-24 21:54:11,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114522352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:11,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:11,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:54:11,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209778658] [2023-11-24 21:54:11,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:11,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:11,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:11,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:11,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:11,283 INFO L87 Difference]: Start difference. First operand 1783 states and 1942 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:11,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:11,934 INFO L93 Difference]: Finished difference Result 4099 states and 4526 transitions. [2023-11-24 21:54:11,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:11,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 412 [2023-11-24 21:54:11,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:11,948 INFO L225 Difference]: With dead ends: 4099 [2023-11-24 21:54:11,948 INFO L226 Difference]: Without dead ends: 2495 [2023-11-24 21:54:11,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:11,952 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 112 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:11,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 200 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:54:11,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2023-11-24 21:54:11,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2317. [2023-11-24 21:54:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 1.0936960276338514) internal successors, (2533), 2316 states have internal predecessors, (2533), 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 21:54:12,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2533 transitions. [2023-11-24 21:54:12,012 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2533 transitions. Word has length 412 [2023-11-24 21:54:12,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:12,013 INFO L495 AbstractCegarLoop]: Abstraction has 2317 states and 2533 transitions. [2023-11-24 21:54:12,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:54:12,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2533 transitions. [2023-11-24 21:54:12,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-24 21:54:12,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:12,022 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:12,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:54:12,023 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:12,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:12,024 INFO L85 PathProgramCache]: Analyzing trace with hash -843974257, now seen corresponding path program 1 times [2023-11-24 21:54:12,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:12,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875032784] [2023-11-24 21:54:12,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:12,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 391 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-24 21:54:12,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:12,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875032784] [2023-11-24 21:54:12,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875032784] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:12,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:12,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:54:12,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538650787] [2023-11-24 21:54:12,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:12,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:12,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:12,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:12,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:12,415 INFO L87 Difference]: Start difference. First operand 2317 states and 2533 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 21:54:13,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:13,081 INFO L93 Difference]: Finished difference Result 5523 states and 6119 transitions. [2023-11-24 21:54:13,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:13,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 453 [2023-11-24 21:54:13,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:13,100 INFO L225 Difference]: With dead ends: 5523 [2023-11-24 21:54:13,101 INFO L226 Difference]: Without dead ends: 3385 [2023-11-24 21:54:13,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:13,104 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 71 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:13,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 50 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:54:13,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3385 states. [2023-11-24 21:54:13,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3385 to 3207. [2023-11-24 21:54:13,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 3206 states have (on average 1.085776668746101) internal successors, (3481), 3206 states have internal predecessors, (3481), 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 21:54:13,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 3481 transitions. [2023-11-24 21:54:13,185 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 3481 transitions. Word has length 453 [2023-11-24 21:54:13,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:13,186 INFO L495 AbstractCegarLoop]: Abstraction has 3207 states and 3481 transitions. [2023-11-24 21:54:13,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 21:54:13,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 3481 transitions. [2023-11-24 21:54:13,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-24 21:54:13,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:13,202 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 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] [2023-11-24 21:54:13,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:54:13,203 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:13,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:13,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1038859316, now seen corresponding path program 1 times [2023-11-24 21:54:13,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:13,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967739354] [2023-11-24 21:54:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:13,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 732 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2023-11-24 21:54:13,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:13,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967739354] [2023-11-24 21:54:13,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967739354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:54:13,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545666234] [2023-11-24 21:54:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:13,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:13,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:54:13,849 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:54:13,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:54:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:14,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:54:14,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:54:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 1067 trivial. 0 not checked. [2023-11-24 21:54:14,207 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:54:14,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545666234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:14,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:54:14,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-24 21:54:14,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127994730] [2023-11-24 21:54:14,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:14,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:14,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:14,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:14,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:54:14,212 INFO L87 Difference]: Start difference. First operand 3207 states and 3481 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 21:54:14,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:14,880 INFO L93 Difference]: Finished difference Result 7303 states and 7963 transitions. [2023-11-24 21:54:14,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:14,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 608 [2023-11-24 21:54:14,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:14,906 INFO L225 Difference]: With dead ends: 7303 [2023-11-24 21:54:14,906 INFO L226 Difference]: Without dead ends: 4275 [2023-11-24 21:54:14,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:54:14,910 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 161 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:14,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 244 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:54:14,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2023-11-24 21:54:15,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 4275. [2023-11-24 21:54:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4275 states, 4274 states have (on average 1.0769770706598034) internal successors, (4603), 4274 states have internal predecessors, (4603), 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 21:54:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 4603 transitions. [2023-11-24 21:54:15,025 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 4603 transitions. Word has length 608 [2023-11-24 21:54:15,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:15,026 INFO L495 AbstractCegarLoop]: Abstraction has 4275 states and 4603 transitions. [2023-11-24 21:54:15,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 21:54:15,026 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 4603 transitions. [2023-11-24 21:54:15,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2023-11-24 21:54:15,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:15,046 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:15,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-24 21:54:15,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 21:54:15,252 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:15,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:15,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1984834213, now seen corresponding path program 1 times [2023-11-24 21:54:15,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:15,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832761973] [2023-11-24 21:54:15,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:15,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1450 backedges. 1014 proven. 104 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2023-11-24 21:54:16,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:16,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832761973] [2023-11-24 21:54:16,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832761973] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:54:16,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032850191] [2023-11-24 21:54:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:16,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:16,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:54:16,458 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:54:16,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:54:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:16,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:54:16,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:54:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1450 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 1343 trivial. 0 not checked. [2023-11-24 21:54:16,770 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:54:16,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032850191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:16,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:54:16,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-24 21:54:16,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807156462] [2023-11-24 21:54:16,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:16,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:16,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:16,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:16,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:54:16,777 INFO L87 Difference]: Start difference. First operand 4275 states and 4603 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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 21:54:17,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:17,403 INFO L93 Difference]: Finished difference Result 5523 states and 5924 transitions. [2023-11-24 21:54:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:17,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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 610 [2023-11-24 21:54:17,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:17,432 INFO L225 Difference]: With dead ends: 5523 [2023-11-24 21:54:17,432 INFO L226 Difference]: Without dead ends: 5521 [2023-11-24 21:54:17,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 609 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:54:17,435 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 181 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:17,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 9 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:54:17,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5521 states. [2023-11-24 21:54:17,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5521 to 4275. [2023-11-24 21:54:17,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4275 states, 4274 states have (on average 1.0769770706598034) internal successors, (4603), 4274 states have internal predecessors, (4603), 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 21:54:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 4603 transitions. [2023-11-24 21:54:17,558 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 4603 transitions. Word has length 610 [2023-11-24 21:54:17,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:17,559 INFO L495 AbstractCegarLoop]: Abstraction has 4275 states and 4603 transitions. [2023-11-24 21:54:17,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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 21:54:17,560 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 4603 transitions. [2023-11-24 21:54:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2023-11-24 21:54:17,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:17,568 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:17,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:54:17,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 21:54:17,776 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:17,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:17,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2028971570, now seen corresponding path program 1 times [2023-11-24 21:54:17,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:17,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077355327] [2023-11-24 21:54:17,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:17,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1522 backedges. 1086 proven. 104 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2023-11-24 21:54:19,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:19,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077355327] [2023-11-24 21:54:19,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077355327] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:54:19,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245420503] [2023-11-24 21:54:19,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:19,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:19,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:54:19,008 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:54:19,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:54:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:19,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:54:19,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:54:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1522 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2023-11-24 21:54:19,324 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:54:19,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245420503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:19,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:54:19,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-24 21:54:19,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091534020] [2023-11-24 21:54:19,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:19,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:19,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:19,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:19,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:54:19,328 INFO L87 Difference]: Start difference. First operand 4275 states and 4603 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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 21:54:20,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:20,016 INFO L93 Difference]: Finished difference Result 9439 states and 10195 transitions. [2023-11-24 21:54:20,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:20,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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 628 [2023-11-24 21:54:20,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:20,044 INFO L225 Difference]: With dead ends: 9439 [2023-11-24 21:54:20,044 INFO L226 Difference]: Without dead ends: 5343 [2023-11-24 21:54:20,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 627 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:54:20,050 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 164 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:20,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 47 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:54:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5343 states. [2023-11-24 21:54:20,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5343 to 4809. [2023-11-24 21:54:20,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4809 states, 4808 states have (on average 1.0794509151414309) internal successors, (5190), 4808 states have internal predecessors, (5190), 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 21:54:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4809 states to 4809 states and 5190 transitions. [2023-11-24 21:54:20,154 INFO L78 Accepts]: Start accepts. Automaton has 4809 states and 5190 transitions. Word has length 628 [2023-11-24 21:54:20,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:20,156 INFO L495 AbstractCegarLoop]: Abstraction has 4809 states and 5190 transitions. [2023-11-24 21:54:20,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 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 21:54:20,156 INFO L276 IsEmpty]: Start isEmpty. Operand 4809 states and 5190 transitions. [2023-11-24 21:54:20,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2023-11-24 21:54:20,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:20,167 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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] [2023-11-24 21:54:20,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:54:20,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 21:54:20,379 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:20,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:20,379 INFO L85 PathProgramCache]: Analyzing trace with hash -694069940, now seen corresponding path program 1 times [2023-11-24 21:54:20,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:20,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118111720] [2023-11-24 21:54:20,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:20,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 1118 proven. 104 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2023-11-24 21:54:21,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:21,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118111720] [2023-11-24 21:54:21,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118111720] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:54:21,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844738179] [2023-11-24 21:54:21,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:21,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:21,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:54:21,450 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:54:21,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:54:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:21,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:54:21,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:54:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 1145 proven. 0 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2023-11-24 21:54:22,349 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:54:22,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844738179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:22,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:54:22,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-24 21:54:22,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546959195] [2023-11-24 21:54:22,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:22,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:22,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:22,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:22,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:54:22,353 INFO L87 Difference]: Start difference. First operand 4809 states and 5190 transitions. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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 21:54:22,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:22,990 INFO L93 Difference]: Finished difference Result 9261 states and 10010 transitions. [2023-11-24 21:54:22,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:22,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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 693 [2023-11-24 21:54:22,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:23,008 INFO L225 Difference]: With dead ends: 9261 [2023-11-24 21:54:23,008 INFO L226 Difference]: Without dead ends: 4631 [2023-11-24 21:54:23,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 692 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:54:23,016 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 71 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:23,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 240 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:54:23,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2023-11-24 21:54:23,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 4275. [2023-11-24 21:54:23,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4275 states, 4274 states have (on average 1.0769770706598034) internal successors, (4603), 4274 states have internal predecessors, (4603), 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 21:54:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 4603 transitions. [2023-11-24 21:54:23,126 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 4603 transitions. Word has length 693 [2023-11-24 21:54:23,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:23,127 INFO L495 AbstractCegarLoop]: Abstraction has 4275 states and 4603 transitions. [2023-11-24 21:54:23,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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 21:54:23,128 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 4603 transitions. [2023-11-24 21:54:23,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2023-11-24 21:54:23,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:23,149 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 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] [2023-11-24 21:54:23,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:54:23,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 21:54:23,362 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:23,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:23,362 INFO L85 PathProgramCache]: Analyzing trace with hash -517273340, now seen corresponding path program 1 times [2023-11-24 21:54:23,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:23,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197974004] [2023-11-24 21:54:23,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:23,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 1476 proven. 0 refuted. 0 times theorem prover too weak. 838 trivial. 0 not checked. [2023-11-24 21:54:24,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:24,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197974004] [2023-11-24 21:54:24,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197974004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:24,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:24,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:54:24,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983978369] [2023-11-24 21:54:24,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:24,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:24,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:24,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:24,081 INFO L87 Difference]: Start difference. First operand 4275 states and 4603 transitions. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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 21:54:24,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:24,707 INFO L93 Difference]: Finished difference Result 9439 states and 10250 transitions. [2023-11-24 21:54:24,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:24,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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 910 [2023-11-24 21:54:24,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:24,718 INFO L225 Difference]: With dead ends: 9439 [2023-11-24 21:54:24,719 INFO L226 Difference]: Without dead ends: 5343 [2023-11-24 21:54:24,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:24,724 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 107 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:24,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 37 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:54:24,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5343 states. [2023-11-24 21:54:24,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5343 to 5343. [2023-11-24 21:54:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5343 states, 5342 states have (on average 1.0803070011231748) internal successors, (5771), 5342 states have internal predecessors, (5771), 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 21:54:24,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5343 states to 5343 states and 5771 transitions. [2023-11-24 21:54:24,825 INFO L78 Accepts]: Start accepts. Automaton has 5343 states and 5771 transitions. Word has length 910 [2023-11-24 21:54:24,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:24,827 INFO L495 AbstractCegarLoop]: Abstraction has 5343 states and 5771 transitions. [2023-11-24 21:54:24,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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 21:54:24,827 INFO L276 IsEmpty]: Start isEmpty. Operand 5343 states and 5771 transitions. [2023-11-24 21:54:24,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 929 [2023-11-24 21:54:24,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:24,844 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:24,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:54:24,845 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:24,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:24,845 INFO L85 PathProgramCache]: Analyzing trace with hash -929959849, now seen corresponding path program 1 times [2023-11-24 21:54:24,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:24,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728637307] [2023-11-24 21:54:24,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:24,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2342 backedges. 1572 proven. 93 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2023-11-24 21:54:25,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:25,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728637307] [2023-11-24 21:54:25,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728637307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:54:25,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631610871] [2023-11-24 21:54:25,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:25,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:54:25,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:54:25,986 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:54:26,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:54:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:26,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:54:26,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:54:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2342 backedges. 1665 proven. 0 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2023-11-24 21:54:26,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:54:26,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631610871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:26,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:54:26,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-24 21:54:26,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558136267] [2023-11-24 21:54:26,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:26,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:26,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:26,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:26,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:54:27,000 INFO L87 Difference]: Start difference. First operand 5343 states and 5771 transitions. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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 21:54:27,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:27,580 INFO L93 Difference]: Finished difference Result 11219 states and 12102 transitions. [2023-11-24 21:54:27,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:27,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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 928 [2023-11-24 21:54:27,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:27,591 INFO L225 Difference]: With dead ends: 11219 [2023-11-24 21:54:27,591 INFO L226 Difference]: Without dead ends: 6055 [2023-11-24 21:54:27,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 931 GetRequests, 927 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:54:27,597 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:27,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 63 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:54:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6055 states. [2023-11-24 21:54:27,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6055 to 5343. [2023-11-24 21:54:27,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5343 states, 5342 states have (on average 1.0803070011231748) internal successors, (5771), 5342 states have internal predecessors, (5771), 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 21:54:27,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5343 states to 5343 states and 5771 transitions. [2023-11-24 21:54:27,703 INFO L78 Accepts]: Start accepts. Automaton has 5343 states and 5771 transitions. Word has length 928 [2023-11-24 21:54:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:27,704 INFO L495 AbstractCegarLoop]: Abstraction has 5343 states and 5771 transitions. [2023-11-24 21:54:27,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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 21:54:27,705 INFO L276 IsEmpty]: Start isEmpty. Operand 5343 states and 5771 transitions. [2023-11-24 21:54:27,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 930 [2023-11-24 21:54:27,718 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:27,719 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:27,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-24 21:54:27,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359bae5c-8b68-40c3-973d-509163a962cc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-24 21:54:27,926 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:27,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:27,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1137532134, now seen corresponding path program 1 times [2023-11-24 21:54:27,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:27,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750942625] [2023-11-24 21:54:27,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:27,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2518 backedges. 1737 proven. 0 refuted. 0 times theorem prover too weak. 781 trivial. 0 not checked. [2023-11-24 21:54:29,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:29,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750942625] [2023-11-24 21:54:29,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750942625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:29,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:29,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:54:29,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476641831] [2023-11-24 21:54:29,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:29,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:29,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:29,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:29,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:29,238 INFO L87 Difference]: Start difference. First operand 5343 states and 5771 transitions. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 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 21:54:29,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:29,835 INFO L93 Difference]: Finished difference Result 10507 states and 11362 transitions. [2023-11-24 21:54:29,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:29,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 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 929 [2023-11-24 21:54:29,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:29,845 INFO L225 Difference]: With dead ends: 10507 [2023-11-24 21:54:29,845 INFO L226 Difference]: Without dead ends: 5343 [2023-11-24 21:54:29,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:29,852 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 21 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:29,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 224 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:54:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5343 states. [2023-11-24 21:54:29,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5343 to 5343. [2023-11-24 21:54:29,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5343 states, 5342 states have (on average 1.069824035941595) internal successors, (5715), 5342 states have internal predecessors, (5715), 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 21:54:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5343 states to 5343 states and 5715 transitions. [2023-11-24 21:54:29,973 INFO L78 Accepts]: Start accepts. Automaton has 5343 states and 5715 transitions. Word has length 929 [2023-11-24 21:54:29,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:29,974 INFO L495 AbstractCegarLoop]: Abstraction has 5343 states and 5715 transitions. [2023-11-24 21:54:29,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 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 21:54:29,974 INFO L276 IsEmpty]: Start isEmpty. Operand 5343 states and 5715 transitions. [2023-11-24 21:54:29,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1025 [2023-11-24 21:54:29,990 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:29,991 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-24 21:54:29,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 21:54:29,992 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:29,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:29,992 INFO L85 PathProgramCache]: Analyzing trace with hash -437109133, now seen corresponding path program 1 times [2023-11-24 21:54:29,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:29,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269030385] [2023-11-24 21:54:29,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:29,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3087 backedges. 1999 proven. 0 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2023-11-24 21:54:31,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:31,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269030385] [2023-11-24 21:54:31,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269030385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:31,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:31,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:54:31,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327857671] [2023-11-24 21:54:31,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:31,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:31,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:31,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:31,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:31,198 INFO L87 Difference]: Start difference. First operand 5343 states and 5715 transitions. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 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 21:54:31,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:31,838 INFO L93 Difference]: Finished difference Result 10863 states and 11620 transitions. [2023-11-24 21:54:31,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:31,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 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 1024 [2023-11-24 21:54:31,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:31,849 INFO L225 Difference]: With dead ends: 10863 [2023-11-24 21:54:31,850 INFO L226 Difference]: Without dead ends: 5699 [2023-11-24 21:54:31,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:31,855 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 24 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:31,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 223 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:54:31,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5699 states. [2023-11-24 21:54:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5699 to 5521. [2023-11-24 21:54:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5521 states, 5520 states have (on average 1.0628623188405797) internal successors, (5867), 5520 states have internal predecessors, (5867), 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 21:54:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5521 states to 5521 states and 5867 transitions. [2023-11-24 21:54:31,951 INFO L78 Accepts]: Start accepts. Automaton has 5521 states and 5867 transitions. Word has length 1024 [2023-11-24 21:54:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:31,952 INFO L495 AbstractCegarLoop]: Abstraction has 5521 states and 5867 transitions. [2023-11-24 21:54:31,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 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 21:54:31,953 INFO L276 IsEmpty]: Start isEmpty. Operand 5521 states and 5867 transitions. [2023-11-24 21:54:31,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1049 [2023-11-24 21:54:31,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:31,970 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:31,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 21:54:31,970 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:31,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:31,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1495031515, now seen corresponding path program 1 times [2023-11-24 21:54:31,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:31,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599065376] [2023-11-24 21:54:31,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:31,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3581 backedges. 1623 proven. 0 refuted. 0 times theorem prover too weak. 1958 trivial. 0 not checked. [2023-11-24 21:54:33,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:33,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599065376] [2023-11-24 21:54:33,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599065376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:33,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:33,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:54:33,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583651569] [2023-11-24 21:54:33,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:33,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:54:33,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:33,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:54:33,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:54:33,113 INFO L87 Difference]: Start difference. First operand 5521 states and 5867 transitions. Second operand has 7 states, 7 states have (on average 56.857142857142854) internal successors, (398), 6 states have internal predecessors, (398), 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 21:54:33,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:33,904 INFO L93 Difference]: Finished difference Result 10657 states and 11333 transitions. [2023-11-24 21:54:33,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:54:33,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.857142857142854) internal successors, (398), 6 states have internal predecessors, (398), 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 1048 [2023-11-24 21:54:33,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:33,915 INFO L225 Difference]: With dead ends: 10657 [2023-11-24 21:54:33,915 INFO L226 Difference]: Without dead ends: 5343 [2023-11-24 21:54:33,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:54:33,922 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:33,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 17 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:54:33,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5343 states. [2023-11-24 21:54:34,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5343 to 5343. [2023-11-24 21:54:34,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5343 states, 5342 states have (on average 1.051291651067016) internal successors, (5616), 5342 states have internal predecessors, (5616), 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 21:54:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5343 states to 5343 states and 5616 transitions. [2023-11-24 21:54:34,042 INFO L78 Accepts]: Start accepts. Automaton has 5343 states and 5616 transitions. Word has length 1048 [2023-11-24 21:54:34,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:34,044 INFO L495 AbstractCegarLoop]: Abstraction has 5343 states and 5616 transitions. [2023-11-24 21:54:34,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.857142857142854) internal successors, (398), 6 states have internal predecessors, (398), 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 21:54:34,044 INFO L276 IsEmpty]: Start isEmpty. Operand 5343 states and 5616 transitions. [2023-11-24 21:54:34,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1081 [2023-11-24 21:54:34,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:34,072 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:34,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-24 21:54:34,072 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:34,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:34,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1792247736, now seen corresponding path program 1 times [2023-11-24 21:54:34,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:34,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922042430] [2023-11-24 21:54:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:34,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:54:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3507 backedges. 1038 proven. 0 refuted. 0 times theorem prover too weak. 2469 trivial. 0 not checked. [2023-11-24 21:54:35,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:54:35,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922042430] [2023-11-24 21:54:35,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922042430] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:54:35,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:54:35,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:54:35,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392382859] [2023-11-24 21:54:35,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:54:35,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:54:35,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:54:35,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:54:35,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:35,054 INFO L87 Difference]: Start difference. First operand 5343 states and 5616 transitions. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 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 21:54:35,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:54:35,624 INFO L93 Difference]: Finished difference Result 10507 states and 11067 transitions. [2023-11-24 21:54:35,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:54:35,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 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 1080 [2023-11-24 21:54:35,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:54:35,634 INFO L225 Difference]: With dead ends: 10507 [2023-11-24 21:54:35,635 INFO L226 Difference]: Without dead ends: 5521 [2023-11-24 21:54:35,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:54:35,640 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:54:35,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 221 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:54:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5521 states. [2023-11-24 21:54:35,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5521 to 5521. [2023-11-24 21:54:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5521 states, 5520 states have (on average 1.040036231884058) internal successors, (5741), 5520 states have internal predecessors, (5741), 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 21:54:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5521 states to 5521 states and 5741 transitions. [2023-11-24 21:54:35,726 INFO L78 Accepts]: Start accepts. Automaton has 5521 states and 5741 transitions. Word has length 1080 [2023-11-24 21:54:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:54:35,727 INFO L495 AbstractCegarLoop]: Abstraction has 5521 states and 5741 transitions. [2023-11-24 21:54:35,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 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 21:54:35,728 INFO L276 IsEmpty]: Start isEmpty. Operand 5521 states and 5741 transitions. [2023-11-24 21:54:35,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1129 [2023-11-24 21:54:35,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:54:35,746 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:54:35,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-24 21:54:35,747 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:54:35,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:54:35,748 INFO L85 PathProgramCache]: Analyzing trace with hash 601279424, now seen corresponding path program 1 times [2023-11-24 21:54:35,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:54:35,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171422422] [2023-11-24 21:54:35,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:54:35,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:54:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat