./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label44.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label44.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya --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 3542ad3d447b947690b49c5fc158285b42adda78f0fdce0b42f6bfc41ea9f09f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:41:10,739 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:41:10,816 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:41:10,822 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:41:10,823 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:41:10,863 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:41:10,864 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:41:10,865 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:41:10,865 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:41:10,866 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:41:10,866 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:41:10,867 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:41:10,867 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:41:10,875 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:41:10,875 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:41:10,876 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:41:10,876 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:41:10,877 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:41:10,877 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:41:10,877 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:41:10,878 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:41:10,878 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:41:10,879 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:41:10,879 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:41:10,880 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:41:10,880 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:41:10,881 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:41:10,881 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:41:10,881 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:41:10,882 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:41:10,882 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:41:10,882 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:41:10,883 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:41:10,883 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:41:10,884 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:41:10,884 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:41:10,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:41:10,885 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:41:10,885 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:41:10,885 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:41:10,886 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:41:10,886 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:41:10,886 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_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3542ad3d447b947690b49c5fc158285b42adda78f0fdce0b42f6bfc41ea9f09f [2023-11-28 20:41:11,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:41:11,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:41:11,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:41:11,152 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:41:11,152 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:41:11,153 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/eca-rers2012/Problem19_label44.c [2023-11-28 20:41:13,906 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:41:14,359 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:41:14,359 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/sv-benchmarks/c/eca-rers2012/Problem19_label44.c [2023-11-28 20:41:14,402 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/data/ba7f4f444/66ff153a60d84f4a869d507f5998a752/FLAG016eafd70 [2023-11-28 20:41:14,415 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/data/ba7f4f444/66ff153a60d84f4a869d507f5998a752 [2023-11-28 20:41:14,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:41:14,419 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:41:14,420 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:41:14,420 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:41:14,424 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:41:14,425 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:41:14" (1/1) ... [2023-11-28 20:41:14,426 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a5f6b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:14, skipping insertion in model container [2023-11-28 20:41:14,426 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:41:14" (1/1) ... [2023-11-28 20:41:14,642 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:41:14,930 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_b6f0cd49-1fb5-4209-9881-6e629cb64296/sv-benchmarks/c/eca-rers2012/Problem19_label44.c[4684,4697] [2023-11-28 20:41:16,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:41:16,302 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:41:16,321 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_b6f0cd49-1fb5-4209-9881-6e629cb64296/sv-benchmarks/c/eca-rers2012/Problem19_label44.c[4684,4697] [2023-11-28 20:41:17,049 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:41:17,121 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:41:17,121 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:17 WrapperNode [2023-11-28 20:41:17,121 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:41:17,122 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:41:17,122 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:41:17,122 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:41:17,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:17" (1/1) ... [2023-11-28 20:41:17,212 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:17" (1/1) ... [2023-11-28 20:41:18,089 INFO L138 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9426 [2023-11-28 20:41:18,089 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:41:18,090 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:41:18,090 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:41:18,090 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:41:18,099 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:17" (1/1) ... [2023-11-28 20:41:18,099 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:17" (1/1) ... [2023-11-28 20:41:18,223 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:17" (1/1) ... [2023-11-28 20:41:18,532 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]. [2023-11-28 20:41:18,532 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:17" (1/1) ... [2023-11-28 20:41:18,532 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:17" (1/1) ... [2023-11-28 20:41:18,853 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:17" (1/1) ... [2023-11-28 20:41:18,907 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:17" (1/1) ... [2023-11-28 20:41:18,951 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:17" (1/1) ... [2023-11-28 20:41:18,976 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:17" (1/1) ... [2023-11-28 20:41:19,145 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:41:19,146 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:41:19,147 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:41:19,147 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:41:19,148 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:17" (1/1) ... [2023-11-28 20:41:19,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:41:19,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:41:19,183 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:41:19,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:41:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:41:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:41:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:41:19,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:41:19,307 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:41:19,309 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:41:27,927 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:41:28,006 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:41:28,006 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-28 20:41:28,007 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:41:28 BoogieIcfgContainer [2023-11-28 20:41:28,008 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:41:28,010 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:41:28,010 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:41:28,012 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:41:28,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:41:14" (1/3) ... [2023-11-28 20:41:28,013 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aeaac5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:41:28, skipping insertion in model container [2023-11-28 20:41:28,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:41:17" (2/3) ... [2023-11-28 20:41:28,014 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aeaac5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:41:28, skipping insertion in model container [2023-11-28 20:41:28,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:41:28" (3/3) ... [2023-11-28 20:41:28,015 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label44.c [2023-11-28 20:41:28,029 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:41:28,029 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:41:28,098 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:41:28,104 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;@6eb52b4c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:41:28,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:41:28,113 INFO L276 IsEmpty]: Start isEmpty. Operand has 1686 states, 1684 states have (on average 1.902019002375297) internal successors, (3203), 1685 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:28,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-28 20:41:28,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:41:28,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:41:28,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:41:28,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:28,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1732168025, now seen corresponding path program 1 times [2023-11-28 20:41:28,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:28,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113526167] [2023-11-28 20:41:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:28,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:41:28,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:28,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113526167] [2023-11-28 20:41:28,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113526167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:41:28,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:41:28,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:41:28,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350259726] [2023-11-28 20:41:28,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:41:28,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 20:41:28,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:28,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 20:41:28,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:41:28,309 INFO L87 Difference]: Start difference. First operand has 1686 states, 1684 states have (on average 1.902019002375297) internal successors, (3203), 1685 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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) [2023-11-28 20:41:28,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:41:28,424 INFO L93 Difference]: Finished difference Result 3371 states and 6405 transitions. [2023-11-28 20:41:28,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 20:41:28,427 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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 33 [2023-11-28 20:41:28,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:41:28,450 INFO L225 Difference]: With dead ends: 3371 [2023-11-28 20:41:28,451 INFO L226 Difference]: Without dead ends: 1684 [2023-11-28 20:41:28,458 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 [2023-11-28 20:41:28,461 INFO L413 NwaCegarLoop]: 3138 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3138 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:41:28,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3138 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:41:28,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2023-11-28 20:41:28,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1684. [2023-11-28 20:41:28,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 1.8645276292335116) internal successors, (3138), 1683 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:41:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 3138 transitions. [2023-11-28 20:41:28,562 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 3138 transitions. Word has length 33 [2023-11-28 20:41:28,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:41:28,563 INFO L495 AbstractCegarLoop]: Abstraction has 1684 states and 3138 transitions. [2023-11-28 20:41:28,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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) [2023-11-28 20:41:28,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 3138 transitions. [2023-11-28 20:41:28,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-28 20:41:28,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:41:28,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:41:28,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:41:28,565 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:41:28,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:28,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1175487875, now seen corresponding path program 1 times [2023-11-28 20:41:28,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:28,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807825315] [2023-11-28 20:41:28,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:28,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:41:28,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:28,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807825315] [2023-11-28 20:41:28,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807825315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:41:28,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:41:28,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:41:28,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015063057] [2023-11-28 20:41:28,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:41:28,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:41:28,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:28,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:41:28,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:41:28,817 INFO L87 Difference]: Start difference. First operand 1684 states and 3138 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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) [2023-11-28 20:41:43,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:41:43,294 INFO L93 Difference]: Finished difference Result 6202 states and 11756 transitions. [2023-11-28 20:41:43,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:41:43,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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 33 [2023-11-28 20:41:43,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:41:43,316 INFO L225 Difference]: With dead ends: 6202 [2023-11-28 20:41:43,316 INFO L226 Difference]: Without dead ends: 4519 [2023-11-28 20:41:43,319 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 [2023-11-28 20:41:43,321 INFO L413 NwaCegarLoop]: 1846 mSDtfsCounter, 4276 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 11128 mSolverCounterSat, 2129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4276 SdHoareTripleChecker+Valid, 2111 SdHoareTripleChecker+Invalid, 13257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2129 IncrementalHoareTripleChecker+Valid, 11128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:41:43,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4276 Valid, 2111 Invalid, 13257 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2129 Valid, 11128 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time] [2023-11-28 20:41:43,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4519 states. [2023-11-28 20:41:43,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4519 to 4468. [2023-11-28 20:41:43,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4468 states, 4467 states have (on average 1.5981643160958137) internal successors, (7139), 4467 states have internal predecessors, (7139), 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) [2023-11-28 20:41:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4468 states to 4468 states and 7139 transitions. [2023-11-28 20:41:43,453 INFO L78 Accepts]: Start accepts. Automaton has 4468 states and 7139 transitions. Word has length 33 [2023-11-28 20:41:43,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:41:43,453 INFO L495 AbstractCegarLoop]: Abstraction has 4468 states and 7139 transitions. [2023-11-28 20:41:43,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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) [2023-11-28 20:41:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 4468 states and 7139 transitions. [2023-11-28 20:41:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2023-11-28 20:41:43,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:41:43,461 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:41:43,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:41:43,462 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:41:43,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:43,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1382168362, now seen corresponding path program 1 times [2023-11-28 20:41:43,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:43,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392912624] [2023-11-28 20:41:43,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:43,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:41:44,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:44,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392912624] [2023-11-28 20:41:44,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392912624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:41:44,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:41:44,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:41:44,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380231821] [2023-11-28 20:41:44,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:41:44,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:41:44,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:44,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:41:44,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:41:44,306 INFO L87 Difference]: Start difference. First operand 4468 states and 7139 transitions. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 3 states have internal predecessors, (268), 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) [2023-11-28 20:41:51,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:41:51,410 INFO L93 Difference]: Finished difference Result 7601 states and 12931 transitions. [2023-11-28 20:41:51,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:41:51,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 3 states have internal predecessors, (268), 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 268 [2023-11-28 20:41:51,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:41:51,432 INFO L225 Difference]: With dead ends: 7601 [2023-11-28 20:41:51,433 INFO L226 Difference]: Without dead ends: 4468 [2023-11-28 20:41:51,437 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 [2023-11-28 20:41:51,438 INFO L413 NwaCegarLoop]: 1769 mSDtfsCounter, 1151 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 5717 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 5725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:41:51,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 1947 Invalid, 5725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5717 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-11-28 20:41:51,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4468 states. [2023-11-28 20:41:51,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4468 to 4468. [2023-11-28 20:41:51,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4468 states, 4467 states have (on average 1.5961495410790238) internal successors, (7130), 4467 states have internal predecessors, (7130), 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) [2023-11-28 20:41:51,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4468 states to 4468 states and 7130 transitions. [2023-11-28 20:41:51,514 INFO L78 Accepts]: Start accepts. Automaton has 4468 states and 7130 transitions. Word has length 268 [2023-11-28 20:41:51,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:41:51,515 INFO L495 AbstractCegarLoop]: Abstraction has 4468 states and 7130 transitions. [2023-11-28 20:41:51,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 3 states have internal predecessors, (268), 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) [2023-11-28 20:41:51,516 INFO L276 IsEmpty]: Start isEmpty. Operand 4468 states and 7130 transitions. [2023-11-28 20:41:51,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2023-11-28 20:41:51,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:41:51,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:41:51,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 20:41:51,527 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:41:51,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:41:51,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2019829987, now seen corresponding path program 1 times [2023-11-28 20:41:51,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:41:51,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740612058] [2023-11-28 20:41:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:51,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:41:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:41:52,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:41:52,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740612058] [2023-11-28 20:41:52,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740612058] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:41:52,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704943938] [2023-11-28 20:41:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:41:52,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:41:52,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:41:52,829 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:41:52,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:41:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:41:53,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 20:41:53,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:41:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-28 20:41:53,898 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:41:53,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704943938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:41:53,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:41:53,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-28 20:41:53,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989873093] [2023-11-28 20:41:53,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:41:53,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:41:53,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:53,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:41:53,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:41:53,904 INFO L87 Difference]: Start difference. First operand 4468 states and 7130 transitions. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 2 states have internal predecessors, (490), 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) [2023-11-28 20:42:00,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:42:00,919 INFO L93 Difference]: Finished difference Result 10338 states and 18163 transitions. [2023-11-28 20:42:00,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:42:00,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 2 states have internal predecessors, (490), 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 520 [2023-11-28 20:42:00,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:42:00,953 INFO L225 Difference]: With dead ends: 10338 [2023-11-28 20:42:00,953 INFO L226 Difference]: Without dead ends: 7236 [2023-11-28 20:42:00,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:42:00,959 INFO L413 NwaCegarLoop]: 1207 mSDtfsCounter, 1058 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4578 mSolverCounterSat, 1050 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 5628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1050 IncrementalHoareTripleChecker+Valid, 4578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:42:00,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1058 Valid, 1385 Invalid, 5628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1050 Valid, 4578 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-11-28 20:42:00,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7236 states. [2023-11-28 20:42:01,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7236 to 7235. [2023-11-28 20:42:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7235 states, 7234 states have (on average 1.520182471661598) internal successors, (10997), 7234 states have internal predecessors, (10997), 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) [2023-11-28 20:42:01,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7235 states to 7235 states and 10997 transitions. [2023-11-28 20:42:01,103 INFO L78 Accepts]: Start accepts. Automaton has 7235 states and 10997 transitions. Word has length 520 [2023-11-28 20:42:01,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:42:01,104 INFO L495 AbstractCegarLoop]: Abstraction has 7235 states and 10997 transitions. [2023-11-28 20:42:01,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 2 states have internal predecessors, (490), 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) [2023-11-28 20:42:01,105 INFO L276 IsEmpty]: Start isEmpty. Operand 7235 states and 10997 transitions. [2023-11-28 20:42:01,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2023-11-28 20:42:01,115 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:42:01,116 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:42:01,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:42:01,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:01,317 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:42:01,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:01,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1350752466, now seen corresponding path program 1 times [2023-11-28 20:42:01,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:01,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727086251] [2023-11-28 20:42:01,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:01,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-28 20:42:01,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:01,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727086251] [2023-11-28 20:42:01,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727086251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:42:01,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:42:01,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:42:01,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926379852] [2023-11-28 20:42:01,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:42:01,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:42:01,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:01,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:42:01,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:42:01,968 INFO L87 Difference]: Start difference. First operand 7235 states and 10997 transitions. Second operand has 3 states, 3 states have (on average 171.0) internal successors, (513), 2 states have internal predecessors, (513), 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) [2023-11-28 20:42:08,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:42:08,460 INFO L93 Difference]: Finished difference Result 15841 states and 24469 transitions. [2023-11-28 20:42:08,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:42:08,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 2 states have internal predecessors, (513), 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 585 [2023-11-28 20:42:08,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:42:08,496 INFO L225 Difference]: With dead ends: 15841 [2023-11-28 20:42:08,497 INFO L226 Difference]: Without dead ends: 9972 [2023-11-28 20:42:08,504 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 [2023-11-28 20:42:08,505 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 1396 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3928 mSolverCounterSat, 1671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 5599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1671 IncrementalHoareTripleChecker+Valid, 3928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:42:08,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1396 Valid, 752 Invalid, 5599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1671 Valid, 3928 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-11-28 20:42:08,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9972 states. [2023-11-28 20:42:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9972 to 9968. [2023-11-28 20:42:08,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9968 states, 9967 states have (on average 1.3900872880505668) internal successors, (13855), 9967 states have internal predecessors, (13855), 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) [2023-11-28 20:42:08,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9968 states to 9968 states and 13855 transitions. [2023-11-28 20:42:08,713 INFO L78 Accepts]: Start accepts. Automaton has 9968 states and 13855 transitions. Word has length 585 [2023-11-28 20:42:08,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:42:08,714 INFO L495 AbstractCegarLoop]: Abstraction has 9968 states and 13855 transitions. [2023-11-28 20:42:08,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 2 states have internal predecessors, (513), 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) [2023-11-28 20:42:08,715 INFO L276 IsEmpty]: Start isEmpty. Operand 9968 states and 13855 transitions. [2023-11-28 20:42:08,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2023-11-28 20:42:08,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:42:08,733 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:42:08,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 20:42:08,733 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:42:08,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:08,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1356554280, now seen corresponding path program 1 times [2023-11-28 20:42:08,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:08,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091859616] [2023-11-28 20:42:08,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:08,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-28 20:42:09,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:09,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091859616] [2023-11-28 20:42:09,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091859616] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:42:09,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:42:09,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:42:09,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197127959] [2023-11-28 20:42:09,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:42:09,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:42:09,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:09,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:42:09,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:42:09,390 INFO L87 Difference]: Start difference. First operand 9968 states and 13855 transitions. Second operand has 3 states, 3 states have (on average 171.0) internal successors, (513), 2 states have internal predecessors, (513), 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) [2023-11-28 20:42:16,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:42:16,656 INFO L93 Difference]: Finished difference Result 26950 states and 38549 transitions. [2023-11-28 20:42:16,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:42:16,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 2 states have internal predecessors, (513), 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 609 [2023-11-28 20:42:16,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:42:16,684 INFO L225 Difference]: With dead ends: 26950 [2023-11-28 20:42:16,684 INFO L226 Difference]: Without dead ends: 18348 [2023-11-28 20:42:16,691 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 [2023-11-28 20:42:16,692 INFO L413 NwaCegarLoop]: 1328 mSDtfsCounter, 1361 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 4186 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1598 SdHoareTripleChecker+Invalid, 5616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:42:16,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1361 Valid, 1598 Invalid, 5616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4186 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-11-28 20:42:16,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18348 states. [2023-11-28 20:42:16,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18348 to 18333. [2023-11-28 20:42:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18333 states, 18332 states have (on average 1.2809840715688414) internal successors, (23483), 18332 states have internal predecessors, (23483), 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) [2023-11-28 20:42:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18333 states to 18333 states and 23483 transitions. [2023-11-28 20:42:16,910 INFO L78 Accepts]: Start accepts. Automaton has 18333 states and 23483 transitions. Word has length 609 [2023-11-28 20:42:16,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:42:16,911 INFO L495 AbstractCegarLoop]: Abstraction has 18333 states and 23483 transitions. [2023-11-28 20:42:16,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 2 states have internal predecessors, (513), 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) [2023-11-28 20:42:16,911 INFO L276 IsEmpty]: Start isEmpty. Operand 18333 states and 23483 transitions. [2023-11-28 20:42:16,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2023-11-28 20:42:16,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:42:16,925 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:42:16,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 20:42:16,926 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:42:16,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:16,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1936261687, now seen corresponding path program 1 times [2023-11-28 20:42:16,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:16,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241613327] [2023-11-28 20:42:16,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:16,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:17,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:17,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241613327] [2023-11-28 20:42:17,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241613327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:42:17,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:42:17,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:42:17,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905140001] [2023-11-28 20:42:17,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:42:17,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:42:17,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:17,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:42:17,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:42:17,832 INFO L87 Difference]: Start difference. First operand 18333 states and 23483 transitions. Second operand has 5 states, 5 states have (on average 124.8) internal successors, (624), 4 states have internal predecessors, (624), 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) [2023-11-28 20:42:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:42:30,456 INFO L93 Difference]: Finished difference Result 42163 states and 53382 transitions. [2023-11-28 20:42:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:42:30,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 124.8) internal successors, (624), 4 states have internal predecessors, (624), 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 624 [2023-11-28 20:42:30,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:42:30,492 INFO L225 Difference]: With dead ends: 42163 [2023-11-28 20:42:30,492 INFO L226 Difference]: Without dead ends: 25170 [2023-11-28 20:42:30,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:42:30,506 INFO L413 NwaCegarLoop]: 1656 mSDtfsCounter, 2171 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 13164 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2171 SdHoareTripleChecker+Valid, 2186 SdHoareTripleChecker+Invalid, 13576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 13164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:42:30,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2171 Valid, 2186 Invalid, 13576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 13164 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2023-11-28 20:42:30,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25170 states. [2023-11-28 20:42:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25170 to 25165. [2023-11-28 20:42:30,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25165 states, 25164 states have (on average 1.2144333174376092) internal successors, (30560), 25164 states have internal predecessors, (30560), 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) [2023-11-28 20:42:30,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25165 states to 25165 states and 30560 transitions. [2023-11-28 20:42:30,794 INFO L78 Accepts]: Start accepts. Automaton has 25165 states and 30560 transitions. Word has length 624 [2023-11-28 20:42:30,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:42:30,795 INFO L495 AbstractCegarLoop]: Abstraction has 25165 states and 30560 transitions. [2023-11-28 20:42:30,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.8) internal successors, (624), 4 states have internal predecessors, (624), 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) [2023-11-28 20:42:30,795 INFO L276 IsEmpty]: Start isEmpty. Operand 25165 states and 30560 transitions. [2023-11-28 20:42:30,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2023-11-28 20:42:30,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:42:30,802 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:42:30,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 20:42:30,802 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:42:30,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:30,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1269686493, now seen corresponding path program 1 times [2023-11-28 20:42:30,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:30,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663987852] [2023-11-28 20:42:30,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:30,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-11-28 20:42:31,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:31,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663987852] [2023-11-28 20:42:31,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663987852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:42:31,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:42:31,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:42:31,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587058506] [2023-11-28 20:42:31,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:42:31,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:42:31,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:31,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:42:31,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:42:31,971 INFO L87 Difference]: Start difference. First operand 25165 states and 30560 transitions. Second operand has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 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) [2023-11-28 20:42:39,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:42:39,212 INFO L93 Difference]: Finished difference Result 47619 states and 60783 transitions. [2023-11-28 20:42:39,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:42:39,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 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 669 [2023-11-28 20:42:39,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:42:39,244 INFO L225 Difference]: With dead ends: 47619 [2023-11-28 20:42:39,244 INFO L226 Difference]: Without dead ends: 30652 [2023-11-28 20:42:39,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:42:39,261 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 1824 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4018 mSolverCounterSat, 2017 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1824 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 6035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2017 IncrementalHoareTripleChecker+Valid, 4018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:42:39,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1824 Valid, 770 Invalid, 6035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2017 Valid, 4018 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-11-28 20:42:39,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30652 states. [2023-11-28 20:42:39,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30652 to 29280. [2023-11-28 20:42:39,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29280 states, 29279 states have (on average 1.2541070391748352) internal successors, (36719), 29279 states have internal predecessors, (36719), 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) [2023-11-28 20:42:39,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29280 states to 29280 states and 36719 transitions. [2023-11-28 20:42:39,711 INFO L78 Accepts]: Start accepts. Automaton has 29280 states and 36719 transitions. Word has length 669 [2023-11-28 20:42:39,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:42:39,712 INFO L495 AbstractCegarLoop]: Abstraction has 29280 states and 36719 transitions. [2023-11-28 20:42:39,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 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) [2023-11-28 20:42:39,712 INFO L276 IsEmpty]: Start isEmpty. Operand 29280 states and 36719 transitions. [2023-11-28 20:42:39,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2023-11-28 20:42:39,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:42:39,721 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:42:39,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-28 20:42:39,721 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:42:39,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:39,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1238021691, now seen corresponding path program 1 times [2023-11-28 20:42:39,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:39,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567843900] [2023-11-28 20:42:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:39,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 458 proven. 0 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2023-11-28 20:42:40,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:40,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567843900] [2023-11-28 20:42:40,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567843900] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:42:40,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:42:40,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:42:40,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032672280] [2023-11-28 20:42:40,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:42:40,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:42:40,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:40,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:42:40,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:42:40,348 INFO L87 Difference]: Start difference. First operand 29280 states and 36719 transitions. Second operand has 4 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 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) [2023-11-28 20:42:54,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:42:54,083 INFO L93 Difference]: Finished difference Result 103745 states and 131351 transitions. [2023-11-28 20:42:54,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:42:54,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 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 884 [2023-11-28 20:42:54,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:42:54,172 INFO L225 Difference]: With dead ends: 103745 [2023-11-28 20:42:54,172 INFO L226 Difference]: Without dead ends: 75831 [2023-11-28 20:42:54,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:42:54,200 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 3344 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 8848 mSolverCounterSat, 2984 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3344 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 11832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2984 IncrementalHoareTripleChecker+Valid, 8848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:42:54,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3344 Valid, 1047 Invalid, 11832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2984 Valid, 8848 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2023-11-28 20:42:54,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75831 states. [2023-11-28 20:42:54,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75831 to 74392. [2023-11-28 20:42:54,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74392 states, 74391 states have (on average 1.1997956742079015) internal successors, (89254), 74391 states have internal predecessors, (89254), 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) [2023-11-28 20:42:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74392 states to 74392 states and 89254 transitions. [2023-11-28 20:42:55,057 INFO L78 Accepts]: Start accepts. Automaton has 74392 states and 89254 transitions. Word has length 884 [2023-11-28 20:42:55,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:42:55,058 INFO L495 AbstractCegarLoop]: Abstraction has 74392 states and 89254 transitions. [2023-11-28 20:42:55,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 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) [2023-11-28 20:42:55,058 INFO L276 IsEmpty]: Start isEmpty. Operand 74392 states and 89254 transitions. [2023-11-28 20:42:55,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 894 [2023-11-28 20:42:55,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:42:55,068 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:42:55,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-28 20:42:55,069 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:42:55,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:55,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1021897093, now seen corresponding path program 1 times [2023-11-28 20:42:55,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:55,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588457784] [2023-11-28 20:42:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:55,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 374 proven. 313 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-28 20:42:57,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:57,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588457784] [2023-11-28 20:42:57,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588457784] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:57,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893403363] [2023-11-28 20:42:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:57,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:57,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:57,943 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:57,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:42:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:58,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 20:42:58,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 321 proven. 0 refuted. 0 times theorem prover too weak. 398 trivial. 0 not checked. [2023-11-28 20:42:58,409 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:42:58,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893403363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:42:58,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:42:58,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-11-28 20:42:58,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537927691] [2023-11-28 20:42:58,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:42:58,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:42:58,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:58,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:42:58,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:42:58,413 INFO L87 Difference]: Start difference. First operand 74392 states and 89254 transitions. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 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) [2023-11-28 20:43:05,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:05,282 INFO L93 Difference]: Finished difference Result 152878 states and 186658 transitions. [2023-11-28 20:43:05,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:43:05,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 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 893 [2023-11-28 20:43:05,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:05,367 INFO L225 Difference]: With dead ends: 152878 [2023-11-28 20:43:05,367 INFO L226 Difference]: Without dead ends: 92144 [2023-11-28 20:43:05,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 894 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:43:05,391 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 1662 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 4658 mSolverCounterSat, 1008 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1662 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 5666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1008 IncrementalHoareTripleChecker+Valid, 4658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:43:05,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1662 Valid, 762 Invalid, 5666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1008 Valid, 4658 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-11-28 20:43:05,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92144 states. [2023-11-28 20:43:06,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92144 to 90774. [2023-11-28 20:43:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90774 states, 90773 states have (on average 1.1880845625901975) internal successors, (107846), 90773 states have internal predecessors, (107846), 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) [2023-11-28 20:43:06,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90774 states to 90774 states and 107846 transitions. [2023-11-28 20:43:06,210 INFO L78 Accepts]: Start accepts. Automaton has 90774 states and 107846 transitions. Word has length 893 [2023-11-28 20:43:06,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:43:06,211 INFO L495 AbstractCegarLoop]: Abstraction has 90774 states and 107846 transitions. [2023-11-28 20:43:06,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 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) [2023-11-28 20:43:06,211 INFO L276 IsEmpty]: Start isEmpty. Operand 90774 states and 107846 transitions. [2023-11-28 20:43:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 894 [2023-11-28 20:43:06,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:06,219 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:06,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:43:06,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-28 20:43:06,420 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:43:06,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:06,421 INFO L85 PathProgramCache]: Analyzing trace with hash 953996272, now seen corresponding path program 1 times [2023-11-28 20:43:06,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:06,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875746310] [2023-11-28 20:43:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:06,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 321 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-28 20:43:08,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:08,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875746310] [2023-11-28 20:43:08,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875746310] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:08,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:08,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:43:08,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152329844] [2023-11-28 20:43:08,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:08,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:43:08,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:08,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:43:08,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:43:08,894 INFO L87 Difference]: Start difference. First operand 90774 states and 107846 transitions. Second operand has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 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) [2023-11-28 20:43:16,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:16,732 INFO L93 Difference]: Finished difference Result 223954 states and 266472 transitions. [2023-11-28 20:43:16,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:43:16,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 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 893 [2023-11-28 20:43:16,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:16,851 INFO L225 Difference]: With dead ends: 223954 [2023-11-28 20:43:16,851 INFO L226 Difference]: Without dead ends: 134546 [2023-11-28 20:43:16,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:43:16,877 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 1684 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4231 mSolverCounterSat, 2218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1684 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 6449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2218 IncrementalHoareTripleChecker+Valid, 4231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:43:16,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1684 Valid, 668 Invalid, 6449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2218 Valid, 4231 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-11-28 20:43:16,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134546 states. [2023-11-28 20:43:18,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134546 to 128997. [2023-11-28 20:43:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128997 states, 128996 states have (on average 1.1885329777667524) internal successors, (153316), 128996 states have internal predecessors, (153316), 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) [2023-11-28 20:43:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128997 states to 128997 states and 153316 transitions. [2023-11-28 20:43:18,773 INFO L78 Accepts]: Start accepts. Automaton has 128997 states and 153316 transitions. Word has length 893 [2023-11-28 20:43:18,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:43:18,773 INFO L495 AbstractCegarLoop]: Abstraction has 128997 states and 153316 transitions. [2023-11-28 20:43:18,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 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) [2023-11-28 20:43:18,774 INFO L276 IsEmpty]: Start isEmpty. Operand 128997 states and 153316 transitions. [2023-11-28 20:43:18,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 919 [2023-11-28 20:43:18,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:18,783 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:18,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-28 20:43:18,783 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:43:18,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:18,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1840421292, now seen corresponding path program 1 times [2023-11-28 20:43:18,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:18,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778408817] [2023-11-28 20:43:18,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:18,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-11-28 20:43:19,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:19,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778408817] [2023-11-28 20:43:19,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778408817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:19,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:19,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:43:19,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203477306] [2023-11-28 20:43:19,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:19,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:43:19,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:19,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:43:19,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:43:19,981 INFO L87 Difference]: Start difference. First operand 128997 states and 153316 transitions. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 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) [2023-11-28 20:43:29,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:29,362 INFO L93 Difference]: Finished difference Result 294880 states and 359520 transitions. [2023-11-28 20:43:29,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:43:29,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 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 918 [2023-11-28 20:43:29,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:29,559 INFO L225 Difference]: With dead ends: 294880 [2023-11-28 20:43:29,559 INFO L226 Difference]: Without dead ends: 180906 [2023-11-28 20:43:29,739 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 [2023-11-28 20:43:29,740 INFO L413 NwaCegarLoop]: 797 mSDtfsCounter, 1857 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 4357 mSolverCounterSat, 1709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1857 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 6066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1709 IncrementalHoareTripleChecker+Valid, 4357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:43:29,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1857 Valid, 910 Invalid, 6066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1709 Valid, 4357 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2023-11-28 20:43:29,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180906 states. [2023-11-28 20:43:31,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180906 to 178172. [2023-11-28 20:43:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178172 states, 178171 states have (on average 1.2044159823989313) internal successors, (214592), 178171 states have internal predecessors, (214592), 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) [2023-11-28 20:43:31,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178172 states to 178172 states and 214592 transitions. [2023-11-28 20:43:31,562 INFO L78 Accepts]: Start accepts. Automaton has 178172 states and 214592 transitions. Word has length 918 [2023-11-28 20:43:31,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:43:31,563 INFO L495 AbstractCegarLoop]: Abstraction has 178172 states and 214592 transitions. [2023-11-28 20:43:31,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 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) [2023-11-28 20:43:31,563 INFO L276 IsEmpty]: Start isEmpty. Operand 178172 states and 214592 transitions. [2023-11-28 20:43:31,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1005 [2023-11-28 20:43:31,576 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:31,576 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:31,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-28 20:43:31,576 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:43:31,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:31,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1370160061, now seen corresponding path program 1 times [2023-11-28 20:43:31,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:31,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101556515] [2023-11-28 20:43:31,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:31,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 682 proven. 313 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-11-28 20:43:34,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:34,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101556515] [2023-11-28 20:43:34,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101556515] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:43:34,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223717097] [2023-11-28 20:43:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:34,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:34,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:43:34,770 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:43:34,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:43:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:35,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 20:43:35,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1126 backedges. 875 proven. 0 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2023-11-28 20:43:35,586 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:43:35,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223717097] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:35,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:43:35,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-11-28 20:43:35,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625425358] [2023-11-28 20:43:35,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:35,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:43:35,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:35,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:43:35,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:43:35,591 INFO L87 Difference]: Start difference. First operand 178172 states and 214592 transitions. Second operand has 3 states, 3 states have (on average 274.3333333333333) internal successors, (823), 3 states have internal predecessors, (823), 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) [2023-11-28 20:43:44,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:44,434 INFO L93 Difference]: Finished difference Result 458694 states and 557673 transitions. [2023-11-28 20:43:44,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:43:44,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 274.3333333333333) internal successors, (823), 3 states have internal predecessors, (823), 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 1004 [2023-11-28 20:43:44,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:44,803 INFO L225 Difference]: With dead ends: 458694 [2023-11-28 20:43:44,803 INFO L226 Difference]: Without dead ends: 295545 [2023-11-28 20:43:44,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1011 GetRequests, 1005 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:43:44,875 INFO L413 NwaCegarLoop]: 679 mSDtfsCounter, 2355 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4038 mSolverCounterSat, 1466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2355 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 5504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1466 IncrementalHoareTripleChecker+Valid, 4038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:43:44,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2355 Valid, 787 Invalid, 5504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1466 Valid, 4038 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2023-11-28 20:43:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295545 states. [2023-11-28 20:43:47,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295545 to 264147. [2023-11-28 20:43:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264147 states, 264146 states have (on average 1.1944947112581679) internal successors, (315521), 264146 states have internal predecessors, (315521), 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) [2023-11-28 20:43:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264147 states to 264147 states and 315521 transitions. [2023-11-28 20:43:48,633 INFO L78 Accepts]: Start accepts. Automaton has 264147 states and 315521 transitions. Word has length 1004 [2023-11-28 20:43:48,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:43:48,633 INFO L495 AbstractCegarLoop]: Abstraction has 264147 states and 315521 transitions. [2023-11-28 20:43:48,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.3333333333333) internal successors, (823), 3 states have internal predecessors, (823), 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) [2023-11-28 20:43:48,634 INFO L276 IsEmpty]: Start isEmpty. Operand 264147 states and 315521 transitions. [2023-11-28 20:43:48,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1223 [2023-11-28 20:43:48,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:43:48,658 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:43:48,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:43:48,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:43:48,859 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:43:48,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:43:48,859 INFO L85 PathProgramCache]: Analyzing trace with hash 13236397, now seen corresponding path program 1 times [2023-11-28 20:43:48,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:43:48,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492901260] [2023-11-28 20:43:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:43:48,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:43:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:43:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2248 backedges. 1494 proven. 0 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2023-11-28 20:43:49,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:43:49,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492901260] [2023-11-28 20:43:49,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492901260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:43:49,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:43:49,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:43:49,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783016948] [2023-11-28 20:43:49,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:43:49,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:43:49,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:49,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:43:49,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:43:49,957 INFO L87 Difference]: Start difference. First operand 264147 states and 315521 transitions. Second operand has 3 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 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) [2023-11-28 20:43:57,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:43:57,599 INFO L93 Difference]: Finished difference Result 520100 states and 622627 transitions. [2023-11-28 20:43:57,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:43:57,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 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 1222 [2023-11-28 20:43:57,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:43:57,911 INFO L225 Difference]: With dead ends: 520100 [2023-11-28 20:43:57,912 INFO L226 Difference]: Without dead ends: 264149 [2023-11-28 20:43:57,994 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 [2023-11-28 20:43:57,995 INFO L413 NwaCegarLoop]: 2979 mSDtfsCounter, 1332 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4384 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1332 SdHoareTripleChecker+Valid, 3160 SdHoareTripleChecker+Invalid, 4920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 4384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:43:57,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1332 Valid, 3160 Invalid, 4920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 4384 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-11-28 20:43:58,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264149 states. [2023-11-28 20:44:00,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264149 to 247757. [2023-11-28 20:44:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247757 states, 247756 states have (on average 1.1743408837727443) internal successors, (290950), 247756 states have internal predecessors, (290950), 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) [2023-11-28 20:44:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247757 states to 247757 states and 290950 transitions. [2023-11-28 20:44:01,182 INFO L78 Accepts]: Start accepts. Automaton has 247757 states and 290950 transitions. Word has length 1222 [2023-11-28 20:44:01,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:44:01,183 INFO L495 AbstractCegarLoop]: Abstraction has 247757 states and 290950 transitions. [2023-11-28 20:44:01,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 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) [2023-11-28 20:44:01,183 INFO L276 IsEmpty]: Start isEmpty. Operand 247757 states and 290950 transitions. [2023-11-28 20:44:01,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1236 [2023-11-28 20:44:01,213 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:01,214 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:01,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-28 20:44:01,214 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:01,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:01,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1968866992, now seen corresponding path program 1 times [2023-11-28 20:44:01,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:01,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730602435] [2023-11-28 20:44:01,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:01,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1885 backedges. 1263 proven. 0 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2023-11-28 20:44:02,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:02,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730602435] [2023-11-28 20:44:02,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730602435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:44:02,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:44:02,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:44:02,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893956026] [2023-11-28 20:44:02,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:44:02,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:44:02,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:02,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:44:02,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:44:02,421 INFO L87 Difference]: Start difference. First operand 247757 states and 290950 transitions. Second operand has 4 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 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) [2023-11-28 20:44:14,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:44:14,414 INFO L93 Difference]: Finished difference Result 582875 states and 690882 transitions. [2023-11-28 20:44:14,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:44:14,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 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 1235 [2023-11-28 20:44:14,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:44:14,791 INFO L225 Difference]: With dead ends: 582875 [2023-11-28 20:44:14,791 INFO L226 Difference]: Without dead ends: 350141 [2023-11-28 20:44:14,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:44:14,879 INFO L413 NwaCegarLoop]: 785 mSDtfsCounter, 3168 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 6286 mSolverCounterSat, 2591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3168 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 8877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2591 IncrementalHoareTripleChecker+Valid, 6286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:44:14,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3168 Valid, 988 Invalid, 8877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2591 Valid, 6286 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2023-11-28 20:44:15,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350141 states. [2023-11-28 20:44:18,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350141 to 291402. [2023-11-28 20:44:18,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291402 states, 291401 states have (on average 1.1528272037501588) internal successors, (335935), 291401 states have internal predecessors, (335935), 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) [2023-11-28 20:44:18,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291402 states to 291402 states and 335935 transitions. [2023-11-28 20:44:18,902 INFO L78 Accepts]: Start accepts. Automaton has 291402 states and 335935 transitions. Word has length 1235 [2023-11-28 20:44:18,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:44:18,903 INFO L495 AbstractCegarLoop]: Abstraction has 291402 states and 335935 transitions. [2023-11-28 20:44:18,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 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) [2023-11-28 20:44:18,903 INFO L276 IsEmpty]: Start isEmpty. Operand 291402 states and 335935 transitions. [2023-11-28 20:44:18,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1285 [2023-11-28 20:44:18,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:18,925 INFO L195 NwaCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:18,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-28 20:44:18,925 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:18,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:18,925 INFO L85 PathProgramCache]: Analyzing trace with hash 598518793, now seen corresponding path program 1 times [2023-11-28 20:44:18,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:18,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619997650] [2023-11-28 20:44:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:18,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1847 backedges. 1252 proven. 313 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2023-11-28 20:44:22,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:22,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619997650] [2023-11-28 20:44:22,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619997650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:22,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103096006] [2023-11-28 20:44:22,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:22,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:22,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:22,903 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:22,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:44:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:23,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 20:44:23,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1847 backedges. 897 proven. 0 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2023-11-28 20:44:23,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:44:23,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103096006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:44:23,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:44:23,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-11-28 20:44:23,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905796846] [2023-11-28 20:44:23,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:44:23,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:44:23,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:23,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:44:23,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:44:23,619 INFO L87 Difference]: Start difference. First operand 291402 states and 335935 transitions. Second operand has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 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) [2023-11-28 20:44:31,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:44:31,760 INFO L93 Difference]: Finished difference Result 642855 states and 744185 transitions. [2023-11-28 20:44:31,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:44:31,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 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 1284 [2023-11-28 20:44:31,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:44:32,173 INFO L225 Difference]: With dead ends: 642855 [2023-11-28 20:44:32,173 INFO L226 Difference]: Without dead ends: 366476 [2023-11-28 20:44:32,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1291 GetRequests, 1285 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:44:32,580 INFO L413 NwaCegarLoop]: 2277 mSDtfsCounter, 1361 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 4770 mSolverCounterSat, 958 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 2472 SdHoareTripleChecker+Invalid, 5728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 958 IncrementalHoareTripleChecker+Valid, 4770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-11-28 20:44:32,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1361 Valid, 2472 Invalid, 5728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [958 Valid, 4770 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-11-28 20:44:32,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366476 states. [2023-11-28 20:44:35,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366476 to 305049. [2023-11-28 20:44:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305049 states, 305048 states have (on average 1.1350836589651465) internal successors, (346255), 305048 states have internal predecessors, (346255), 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) [2023-11-28 20:44:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305049 states to 305049 states and 346255 transitions. [2023-11-28 20:44:36,247 INFO L78 Accepts]: Start accepts. Automaton has 305049 states and 346255 transitions. Word has length 1284 [2023-11-28 20:44:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:44:36,248 INFO L495 AbstractCegarLoop]: Abstraction has 305049 states and 346255 transitions. [2023-11-28 20:44:36,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 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) [2023-11-28 20:44:36,248 INFO L276 IsEmpty]: Start isEmpty. Operand 305049 states and 346255 transitions. [2023-11-28 20:44:36,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1396 [2023-11-28 20:44:36,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:36,294 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:36,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:44:36,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-28 20:44:36,494 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:36,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:36,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2014265420, now seen corresponding path program 1 times [2023-11-28 20:44:36,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:36,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154483437] [2023-11-28 20:44:36,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:36,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2737 backedges. 1650 proven. 313 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked. [2023-11-28 20:44:40,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:40,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154483437] [2023-11-28 20:44:40,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154483437] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:40,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613583856] [2023-11-28 20:44:40,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:40,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:40,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:40,491 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:40,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:44:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:40,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 20:44:40,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2737 backedges. 1635 proven. 0 refuted. 0 times theorem prover too weak. 1102 trivial. 0 not checked. [2023-11-28 20:44:41,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:44:41,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613583856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:44:41,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:44:41,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-11-28 20:44:41,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381565615] [2023-11-28 20:44:41,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:44:41,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:44:41,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:41,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:44:41,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:44:41,098 INFO L87 Difference]: Start difference. First operand 305049 states and 346255 transitions. Second operand has 3 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 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) [2023-11-28 20:44:50,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:44:50,429 INFO L93 Difference]: Finished difference Result 651126 states and 736019 transitions. [2023-11-28 20:44:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:44:50,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 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 1395 [2023-11-28 20:44:50,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:44:50,824 INFO L225 Difference]: With dead ends: 651126 [2023-11-28 20:44:50,824 INFO L226 Difference]: Without dead ends: 347443 [2023-11-28 20:44:50,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1402 GetRequests, 1396 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:44:50,900 INFO L413 NwaCegarLoop]: 2903 mSDtfsCounter, 1363 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 4842 mSolverCounterSat, 866 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 3074 SdHoareTripleChecker+Invalid, 5708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 866 IncrementalHoareTripleChecker+Valid, 4842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:44:50,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1363 Valid, 3074 Invalid, 5708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [866 Valid, 4842 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-11-28 20:44:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347443 states. [2023-11-28 20:44:54,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347443 to 346009. [2023-11-28 20:44:54,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346009 states, 346008 states have (on average 1.1072547455550161) internal successors, (383119), 346008 states have internal predecessors, (383119), 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) [2023-11-28 20:44:55,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346009 states to 346009 states and 383119 transitions. [2023-11-28 20:44:55,412 INFO L78 Accepts]: Start accepts. Automaton has 346009 states and 383119 transitions. Word has length 1395 [2023-11-28 20:44:55,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:44:55,413 INFO L495 AbstractCegarLoop]: Abstraction has 346009 states and 383119 transitions. [2023-11-28 20:44:55,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 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) [2023-11-28 20:44:55,413 INFO L276 IsEmpty]: Start isEmpty. Operand 346009 states and 383119 transitions. [2023-11-28 20:44:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1426 [2023-11-28 20:44:55,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:44:55,438 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:44:55,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-28 20:44:55,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 20:44:55,639 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:44:55,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:44:55,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1009059511, now seen corresponding path program 1 times [2023-11-28 20:44:55,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:44:55,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053488303] [2023-11-28 20:44:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:55,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:44:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2397 backedges. 1544 proven. 122 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2023-11-28 20:44:58,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:44:58,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053488303] [2023-11-28 20:44:58,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053488303] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:44:58,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532563107] [2023-11-28 20:44:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:44:58,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:44:58,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:44:58,090 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:44:58,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:44:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:44:58,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-28 20:44:58,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:44:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2397 backedges. 1666 proven. 0 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2023-11-28 20:44:58,843 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:44:58,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532563107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:44:58,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:44:58,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-28 20:44:58,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983528878] [2023-11-28 20:44:58,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:44:58,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:44:58,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:44:58,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:44:58,847 INFO L87 Difference]: Start difference. First operand 346009 states and 383119 transitions. Second operand has 3 states, 3 states have (on average 286.6666666666667) internal successors, (860), 3 states have internal predecessors, (860), 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) [2023-11-28 20:45:07,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:45:07,976 INFO L93 Difference]: Finished difference Result 798524 states and 884127 transitions. [2023-11-28 20:45:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:45:07,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 286.6666666666667) internal successors, (860), 3 states have internal predecessors, (860), 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 1425 [2023-11-28 20:45:07,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:45:08,519 INFO L225 Difference]: With dead ends: 798524 [2023-11-28 20:45:08,519 INFO L226 Difference]: Without dead ends: 453881 [2023-11-28 20:45:08,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1428 GetRequests, 1424 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:45:08,618 INFO L413 NwaCegarLoop]: 1196 mSDtfsCounter, 1411 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 4123 mSolverCounterSat, 1474 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 5597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1474 IncrementalHoareTripleChecker+Valid, 4123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:45:08,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1411 Valid, 1336 Invalid, 5597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1474 Valid, 4123 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-11-28 20:45:08,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453881 states. [2023-11-28 20:45:13,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453881 to 442926. [2023-11-28 20:45:13,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442926 states, 442925 states have (on average 1.0979691821414461) internal successors, (486318), 442925 states have internal predecessors, (486318), 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) [2023-11-28 20:45:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442926 states to 442926 states and 486318 transitions. [2023-11-28 20:45:14,280 INFO L78 Accepts]: Start accepts. Automaton has 442926 states and 486318 transitions. Word has length 1425 [2023-11-28 20:45:14,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:45:14,281 INFO L495 AbstractCegarLoop]: Abstraction has 442926 states and 486318 transitions. [2023-11-28 20:45:14,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 286.6666666666667) internal successors, (860), 3 states have internal predecessors, (860), 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) [2023-11-28 20:45:14,281 INFO L276 IsEmpty]: Start isEmpty. Operand 442926 states and 486318 transitions. [2023-11-28 20:45:14,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1472 [2023-11-28 20:45:14,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:45:14,304 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:45:14,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:45:14,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6f0cd49-1fb5-4209-9881-6e629cb64296/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 20:45:14,505 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:45:14,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:45:14,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1239242172, now seen corresponding path program 1 times [2023-11-28 20:45:14,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:45:14,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314397154] [2023-11-28 20:45:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:14,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:45:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:45:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 923 proven. 0 refuted. 0 times theorem prover too weak. 1061 trivial. 0 not checked. [2023-11-28 20:45:17,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:45:17,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314397154] [2023-11-28 20:45:17,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314397154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:45:17,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:45:17,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:45:17,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537486445] [2023-11-28 20:45:17,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:45:17,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:45:17,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:45:17,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:45:17,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:45:17,489 INFO L87 Difference]: Start difference. First operand 442926 states and 486318 transitions. Second operand has 3 states, 3 states have (on average 239.33333333333334) internal successors, (718), 3 states have internal predecessors, (718), 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) [2023-11-28 20:45:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:45:25,494 INFO L93 Difference]: Finished difference Result 861283 states and 947350 transitions. [2023-11-28 20:45:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:45:25,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 239.33333333333334) internal successors, (718), 3 states have internal predecessors, (718), 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 1471 [2023-11-28 20:45:25,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:45:26,063 INFO L225 Difference]: With dead ends: 861283 [2023-11-28 20:45:26,063 INFO L226 Difference]: Without dead ends: 440204 [2023-11-28 20:45:26,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:45:26,215 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 1705 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 3994 mSolverCounterSat, 1263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1705 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 5257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1263 IncrementalHoareTripleChecker+Valid, 3994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-28 20:45:26,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1705 Valid, 708 Invalid, 5257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1263 Valid, 3994 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-11-28 20:45:26,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440204 states. [2023-11-28 20:45:30,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440204 to 440191. [2023-11-28 20:45:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440191 states, 440190 states have (on average 1.0802426225039188) internal successors, (475512), 440190 states have internal predecessors, (475512), 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) [2023-11-28 20:45:31,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440191 states to 440191 states and 475512 transitions. [2023-11-28 20:45:31,051 INFO L78 Accepts]: Start accepts. Automaton has 440191 states and 475512 transitions. Word has length 1471 [2023-11-28 20:45:31,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:45:31,052 INFO L495 AbstractCegarLoop]: Abstraction has 440191 states and 475512 transitions. [2023-11-28 20:45:31,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.33333333333334) internal successors, (718), 3 states have internal predecessors, (718), 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) [2023-11-28 20:45:31,052 INFO L276 IsEmpty]: Start isEmpty. Operand 440191 states and 475512 transitions. [2023-11-28 20:45:31,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1570 [2023-11-28 20:45:31,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:45:31,534 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:45:31,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-28 20:45:31,534 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:45:31,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:45:31,535 INFO L85 PathProgramCache]: Analyzing trace with hash -96140721, now seen corresponding path program 1 times [2023-11-28 20:45:31,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:45:31,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794531528] [2023-11-28 20:45:31,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:31,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:45:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:45:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3111 backedges. 1829 proven. 0 refuted. 0 times theorem prover too weak. 1282 trivial. 0 not checked. [2023-11-28 20:45:32,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:45:32,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794531528] [2023-11-28 20:45:32,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794531528] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:45:32,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:45:32,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:45:32,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395572744] [2023-11-28 20:45:32,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:45:32,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:45:32,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:45:32,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:45:32,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:45:32,691 INFO L87 Difference]: Start difference. First operand 440191 states and 475512 transitions. Second operand has 3 states, 3 states have (on average 247.33333333333334) internal successors, (742), 3 states have internal predecessors, (742), 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) [2023-11-28 20:45:42,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:45:42,760 INFO L93 Difference]: Finished difference Result 992396 states and 1073659 transitions. [2023-11-28 20:45:42,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:45:42,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 247.33333333333334) internal successors, (742), 3 states have internal predecessors, (742), 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 1569 [2023-11-28 20:45:42,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:45:43,435 INFO L225 Difference]: With dead ends: 992396 [2023-11-28 20:45:43,435 INFO L226 Difference]: Without dead ends: 553571 [2023-11-28 20:45:43,586 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 [2023-11-28 20:45:43,586 INFO L413 NwaCegarLoop]: 1572 mSDtfsCounter, 1374 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 4810 mSolverCounterSat, 854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1374 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 5664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 854 IncrementalHoareTripleChecker+Valid, 4810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:45:43,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1374 Valid, 1728 Invalid, 5664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [854 Valid, 4810 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2023-11-28 20:45:44,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553571 states. [2023-11-28 20:45:49,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553571 to 553494. [2023-11-28 20:45:49,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553494 states, 553493 states have (on average 1.0698274413587887) internal successors, (592142), 553493 states have internal predecessors, (592142), 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) [2023-11-28 20:45:49,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553494 states to 553494 states and 592142 transitions. [2023-11-28 20:45:49,979 INFO L78 Accepts]: Start accepts. Automaton has 553494 states and 592142 transitions. Word has length 1569 [2023-11-28 20:45:49,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:45:49,980 INFO L495 AbstractCegarLoop]: Abstraction has 553494 states and 592142 transitions. [2023-11-28 20:45:49,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 247.33333333333334) internal successors, (742), 3 states have internal predecessors, (742), 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) [2023-11-28 20:45:49,980 INFO L276 IsEmpty]: Start isEmpty. Operand 553494 states and 592142 transitions. [2023-11-28 20:45:50,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2076 [2023-11-28 20:45:50,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:45:50,518 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:45:50,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-28 20:45:50,519 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:45:50,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:45:50,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1669584988, now seen corresponding path program 1 times [2023-11-28 20:45:50,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:45:50,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30847829] [2023-11-28 20:45:50,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:50,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:45:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:45:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4107 backedges. 1722 proven. 0 refuted. 0 times theorem prover too weak. 2385 trivial. 0 not checked. [2023-11-28 20:45:52,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:45:52,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30847829] [2023-11-28 20:45:52,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30847829] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:45:52,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:45:52,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:45:52,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112465165] [2023-11-28 20:45:52,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:45:52,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:45:52,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:45:52,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:45:52,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:45:52,480 INFO L87 Difference]: Start difference. First operand 553494 states and 592142 transitions. Second operand has 3 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 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) [2023-11-28 20:46:01,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:46:01,347 INFO L93 Difference]: Finished difference Result 1081107 states and 1157571 transitions. [2023-11-28 20:46:01,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:46:01,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 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 2075 [2023-11-28 20:46:01,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:46:02,448 INFO L225 Difference]: With dead ends: 1081107 [2023-11-28 20:46:02,448 INFO L226 Difference]: Without dead ends: 552190 [2023-11-28 20:46:02,634 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 [2023-11-28 20:46:02,634 INFO L413 NwaCegarLoop]: 2866 mSDtfsCounter, 1409 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 4021 mSolverCounterSat, 1495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1409 SdHoareTripleChecker+Valid, 3025 SdHoareTripleChecker+Invalid, 5516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1495 IncrementalHoareTripleChecker+Valid, 4021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:46:02,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1409 Valid, 3025 Invalid, 5516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1495 Valid, 4021 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-11-28 20:46:03,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552190 states. [2023-11-28 20:46:07,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552190 to 552115. [2023-11-28 20:46:07,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552115 states, 552114 states have (on average 1.0577072850896736) internal successors, (583975), 552114 states have internal predecessors, (583975), 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)