./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/fragtest_simple.i --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_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/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_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/fragtest_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/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_d67fcb23-f8c1-4758-9dce-93e130e552dd/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 be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:38:33,906 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:38:33,980 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:38:33,985 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:38:33,986 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:38:34,012 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:38:34,013 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:38:34,013 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:38:34,014 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:38:34,015 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:38:34,015 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:38:34,016 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:38:34,016 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:38:34,017 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:38:34,018 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:38:34,018 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:38:34,019 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:38:34,019 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:38:34,020 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:38:34,020 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:38:34,021 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:38:34,022 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:38:34,022 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:38:34,023 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:38:34,023 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:38:34,024 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:38:34,026 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:38:34,026 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:38:34,027 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:38:34,027 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:38:34,027 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:38:34,028 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:38:34,028 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:38:34,028 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:38:34,028 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:38:34,029 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:38:34,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:38:34,029 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:38:34,029 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:38:34,029 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:38:34,030 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:38:34,030 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:38:34,030 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_d67fcb23-f8c1-4758-9dce-93e130e552dd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e [2023-11-29 05:38:34,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:38:34,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:38:34,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:38:34,338 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:38:34,338 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:38:34,339 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/loop-invgen/fragtest_simple.i [2023-11-29 05:38:37,269 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:38:37,463 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:38:37,463 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/sv-benchmarks/c/loop-invgen/fragtest_simple.i [2023-11-29 05:38:37,472 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/data/73b6fe546/226347315a9341e0a1d6dee4a6085b63/FLAGc1a8cdf49 [2023-11-29 05:38:37,490 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/data/73b6fe546/226347315a9341e0a1d6dee4a6085b63 [2023-11-29 05:38:37,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:38:37,495 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:38:37,497 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:38:37,497 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:38:37,503 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:38:37,504 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:38:37" (1/1) ... [2023-11-29 05:38:37,505 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9d9da99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:37, skipping insertion in model container [2023-11-29 05:38:37,506 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:38:37" (1/1) ... [2023-11-29 05:38:37,532 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:38:37,708 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_d67fcb23-f8c1-4758-9dce-93e130e552dd/sv-benchmarks/c/loop-invgen/fragtest_simple.i[893,906] [2023-11-29 05:38:37,723 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:38:37,735 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:38:37,749 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_d67fcb23-f8c1-4758-9dce-93e130e552dd/sv-benchmarks/c/loop-invgen/fragtest_simple.i[893,906] [2023-11-29 05:38:37,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:38:37,771 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:38:37,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:37 WrapperNode [2023-11-29 05:38:37,771 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:38:37,773 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:38:37,773 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:38:37,773 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:38:37,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:37" (1/1) ... [2023-11-29 05:38:37,788 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:37" (1/1) ... [2023-11-29 05:38:37,811 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2023-11-29 05:38:37,811 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:38:37,812 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:38:37,813 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:38:37,813 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:38:37,831 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:37" (1/1) ... [2023-11-29 05:38:37,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:37" (1/1) ... [2023-11-29 05:38:37,833 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:37" (1/1) ... [2023-11-29 05:38:37,844 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]. [2023-11-29 05:38:37,844 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:37" (1/1) ... [2023-11-29 05:38:37,845 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:37" (1/1) ... [2023-11-29 05:38:37,847 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:37" (1/1) ... [2023-11-29 05:38:37,851 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:37" (1/1) ... [2023-11-29 05:38:37,852 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:37" (1/1) ... [2023-11-29 05:38:37,852 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:37" (1/1) ... [2023-11-29 05:38:37,854 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:38:37,855 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:38:37,855 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:38:37,855 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:38:37,856 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:37" (1/1) ... [2023-11-29 05:38:37,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:38:37,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:37,914 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:38:37,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:38:37,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:38:37,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:38:37,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:38:37,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:38:38,027 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:38:38,030 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:38:38,157 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:38:38,186 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:38:38,186 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 05:38:38,187 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:38:38 BoogieIcfgContainer [2023-11-29 05:38:38,187 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:38:38,190 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:38:38,190 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:38:38,193 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:38:38,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:38:37" (1/3) ... [2023-11-29 05:38:38,194 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b11b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:38:38, skipping insertion in model container [2023-11-29 05:38:38,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:38:37" (2/3) ... [2023-11-29 05:38:38,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b11b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:38:38, skipping insertion in model container [2023-11-29 05:38:38,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:38:38" (3/3) ... [2023-11-29 05:38:38,197 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2023-11-29 05:38:38,216 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:38:38,216 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:38:38,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:38:38,273 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;@47589171, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:38:38,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:38:38,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 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) [2023-11-29 05:38:38,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 05:38:38,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:38,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:38,283 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:38,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:38,289 INFO L85 PathProgramCache]: Analyzing trace with hash 217789248, now seen corresponding path program 1 times [2023-11-29 05:38:38,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:38,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960809533] [2023-11-29 05:38:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:38,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:38,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:38,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960809533] [2023-11-29 05:38:38,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960809533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:38:38,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:38:38,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:38:38,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127936766] [2023-11-29 05:38:38,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:38,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 05:38:38,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:38,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 05:38:38,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:38:38,489 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2023-11-29 05:38:38,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:38:38,514 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2023-11-29 05:38:38,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 05:38:38,517 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2023-11-29 05:38:38,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:38:38,527 INFO L225 Difference]: With dead ends: 29 [2023-11-29 05:38:38,527 INFO L226 Difference]: Without dead ends: 14 [2023-11-29 05:38:38,531 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 [2023-11-29 05:38:38,536 INFO L413 NwaCegarLoop]: 17 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, 17 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 [2023-11-29 05:38:38,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:38:38,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-29 05:38:38,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-29 05:38:38,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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) [2023-11-29 05:38:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-11-29 05:38:38,579 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2023-11-29 05:38:38,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:38:38,579 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-11-29 05:38:38,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2023-11-29 05:38:38,580 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-11-29 05:38:38,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 05:38:38,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:38,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:38,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:38:38,582 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:38,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:38,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1079105914, now seen corresponding path program 1 times [2023-11-29 05:38:38,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:38,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583108237] [2023-11-29 05:38:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:38,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:38,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:38,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583108237] [2023-11-29 05:38:38,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583108237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:38:38,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:38:38,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:38:38,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842403747] [2023-11-29 05:38:38,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:38,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:38:38,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:38,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:38:38,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:38:38,820 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-11-29 05:38:38,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:38:38,868 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2023-11-29 05:38:38,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:38:38,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2023-11-29 05:38:38,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:38:38,870 INFO L225 Difference]: With dead ends: 19 [2023-11-29 05:38:38,870 INFO L226 Difference]: Without dead ends: 17 [2023-11-29 05:38:38,871 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 [2023-11-29 05:38:38,873 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:38:38,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:38:38,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-29 05:38:38,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2023-11-29 05:38:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-11-29 05:38:38,881 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2023-11-29 05:38:38,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:38:38,882 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-11-29 05:38:38,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-11-29 05:38:38,882 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-11-29 05:38:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 05:38:38,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:38,883 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:38,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:38:38,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:38,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:38,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1318207955, now seen corresponding path program 1 times [2023-11-29 05:38:38,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:38,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971610794] [2023-11-29 05:38:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:38,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:38,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:39,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:39,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971610794] [2023-11-29 05:38:39,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971610794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:38:39,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:38:39,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:38:39,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267877276] [2023-11-29 05:38:39,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:38:39,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:38:39,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:39,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:38:39,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:38:39,054 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:39,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:38:39,130 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2023-11-29 05:38:39,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:38:39,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-29 05:38:39,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:38:39,131 INFO L225 Difference]: With dead ends: 33 [2023-11-29 05:38:39,132 INFO L226 Difference]: Without dead ends: 22 [2023-11-29 05:38:39,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:38:39,134 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:38:39,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:38:39,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-29 05:38:39,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2023-11-29 05:38:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2023-11-29 05:38:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-11-29 05:38:39,142 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 15 [2023-11-29 05:38:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:38:39,143 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-11-29 05:38:39,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:39,143 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-11-29 05:38:39,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 05:38:39,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:39,144 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:39,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:38:39,145 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:39,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:39,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1219861422, now seen corresponding path program 1 times [2023-11-29 05:38:39,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:39,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835280763] [2023-11-29 05:38:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:39,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:39,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:39,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835280763] [2023-11-29 05:38:39,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835280763] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:39,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602996854] [2023-11-29 05:38:39,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:39,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:39,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:39,290 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:39,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:38:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:39,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:38:39,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:39,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:39,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602996854] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:39,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:39,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2023-11-29 05:38:39,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860472879] [2023-11-29 05:38:39,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:39,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:38:39,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:39,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:38:39,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:38:39,592 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:38:39,861 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2023-11-29 05:38:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:38:39,862 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-29 05:38:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:38:39,863 INFO L225 Difference]: With dead ends: 44 [2023-11-29 05:38:39,863 INFO L226 Difference]: Without dead ends: 33 [2023-11-29 05:38:39,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:38:39,865 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:38:39,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 52 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:38:39,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-29 05:38:39,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2023-11-29 05:38:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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) [2023-11-29 05:38:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-11-29 05:38:39,873 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2023-11-29 05:38:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:38:39,873 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-11-29 05:38:39,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:39,874 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-11-29 05:38:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 05:38:39,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:39,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:39,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:38:40,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:40,076 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:40,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:40,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1316760726, now seen corresponding path program 2 times [2023-11-29 05:38:40,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:40,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31468812] [2023-11-29 05:38:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:40,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:40,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:40,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31468812] [2023-11-29 05:38:40,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31468812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:40,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376889874] [2023-11-29 05:38:40,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:38:40,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:40,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:40,234 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:40,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:38:40,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:38:40,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:40,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:38:40,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:40,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:40,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376889874] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:40,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:40,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2023-11-29 05:38:40,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987334227] [2023-11-29 05:38:40,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:40,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 05:38:40,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:40,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 05:38:40,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:38:40,597 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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) [2023-11-29 05:38:40,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:38:40,933 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2023-11-29 05:38:40,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:38:40,933 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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 23 [2023-11-29 05:38:40,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:38:40,936 INFO L225 Difference]: With dead ends: 58 [2023-11-29 05:38:40,936 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 05:38:40,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:38:40,938 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:38:40,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 66 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:38:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 05:38:40,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2023-11-29 05:38:40,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 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) [2023-11-29 05:38:40,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-11-29 05:38:40,948 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2023-11-29 05:38:40,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:38:40,949 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-11-29 05:38:40,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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) [2023-11-29 05:38:40,949 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-11-29 05:38:40,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 05:38:40,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:40,951 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:40,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:38:41,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:41,157 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:41,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:41,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1865733826, now seen corresponding path program 3 times [2023-11-29 05:38:41,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:41,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357596213] [2023-11-29 05:38:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:41,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:41,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:41,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357596213] [2023-11-29 05:38:41,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357596213] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:41,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974630605] [2023-11-29 05:38:41,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:38:41,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:41,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:41,343 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:41,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:38:41,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:38:41,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:41,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:38:41,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:41,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:41,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974630605] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:41,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:41,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2023-11-29 05:38:41,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168036597] [2023-11-29 05:38:41,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:41,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 05:38:41,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:41,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 05:38:41,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:38:41,704 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 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) [2023-11-29 05:38:41,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:38:41,847 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2023-11-29 05:38:41,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:38:41,847 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 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 29 [2023-11-29 05:38:41,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:38:41,848 INFO L225 Difference]: With dead ends: 67 [2023-11-29 05:38:41,848 INFO L226 Difference]: Without dead ends: 48 [2023-11-29 05:38:41,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:38:41,850 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:38:41,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 79 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:38:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-29 05:38:41,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2023-11-29 05:38:41,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 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) [2023-11-29 05:38:41,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-11-29 05:38:41,858 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2023-11-29 05:38:41,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:38:41,858 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-11-29 05:38:41,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 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) [2023-11-29 05:38:41,858 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-11-29 05:38:41,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 05:38:41,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:41,859 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:41,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:38:42,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:42,067 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:42,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:42,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1202542631, now seen corresponding path program 4 times [2023-11-29 05:38:42,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:42,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745056607] [2023-11-29 05:38:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:42,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:42,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:42,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745056607] [2023-11-29 05:38:42,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745056607] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:42,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846177441] [2023-11-29 05:38:42,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:38:42,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:42,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:42,249 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:42,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:38:42,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:38:42,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:42,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:38:42,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:42,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:42,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846177441] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:42,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:42,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2023-11-29 05:38:42,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964560056] [2023-11-29 05:38:42,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:42,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:38:42,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:42,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:38:42,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:38:42,525 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 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) [2023-11-29 05:38:42,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:38:42,642 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2023-11-29 05:38:42,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:38:42,642 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 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 31 [2023-11-29 05:38:42,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:38:42,643 INFO L225 Difference]: With dead ends: 49 [2023-11-29 05:38:42,644 INFO L226 Difference]: Without dead ends: 47 [2023-11-29 05:38:42,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:38:42,646 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:38:42,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 81 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:38:42,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-29 05:38:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2023-11-29 05:38:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 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) [2023-11-29 05:38:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-11-29 05:38:42,656 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 31 [2023-11-29 05:38:42,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:38:42,656 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-11-29 05:38:42,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 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) [2023-11-29 05:38:42,657 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-11-29 05:38:42,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 05:38:42,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:42,659 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:42,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:38:42,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:42,869 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:42,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:42,869 INFO L85 PathProgramCache]: Analyzing trace with hash 286167821, now seen corresponding path program 5 times [2023-11-29 05:38:42,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:42,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380561840] [2023-11-29 05:38:42,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:42,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 38 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:43,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:43,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380561840] [2023-11-29 05:38:43,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380561840] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:43,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810968192] [2023-11-29 05:38:43,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:38:43,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:43,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:43,132 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:43,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:38:43,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 05:38:43,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:43,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:38:43,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 50 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:43,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 50 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:43,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810968192] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:43,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:43,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2023-11-29 05:38:43,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321203398] [2023-11-29 05:38:43,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:43,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:38:43,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:43,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:38:43,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:38:43,586 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 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) [2023-11-29 05:38:43,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:38:43,869 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2023-11-29 05:38:43,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:38:43,870 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 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 39 [2023-11-29 05:38:43,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:38:43,871 INFO L225 Difference]: With dead ends: 114 [2023-11-29 05:38:43,871 INFO L226 Difference]: Without dead ends: 68 [2023-11-29 05:38:43,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 05:38:43,874 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:38:43,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 106 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:38:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-29 05:38:43,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2023-11-29 05:38:43,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 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) [2023-11-29 05:38:43,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2023-11-29 05:38:43,883 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 39 [2023-11-29 05:38:43,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:38:43,884 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2023-11-29 05:38:43,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 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) [2023-11-29 05:38:43,884 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2023-11-29 05:38:43,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 05:38:43,886 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:43,886 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:43,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:38:44,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:44,092 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:44,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:44,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1270551529, now seen corresponding path program 6 times [2023-11-29 05:38:44,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:44,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012937085] [2023-11-29 05:38:44,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:44,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 30 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:44,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:44,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012937085] [2023-11-29 05:38:44,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012937085] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:44,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912790622] [2023-11-29 05:38:44,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:38:44,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:44,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:44,304 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:44,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:38:44,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-29 05:38:44,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:44,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:38:44,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:44,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:44,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912790622] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:44,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:44,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2023-11-29 05:38:44,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935351239] [2023-11-29 05:38:44,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:44,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 05:38:44,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:44,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 05:38:44,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:38:44,615 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 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) [2023-11-29 05:38:44,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:38:44,745 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2023-11-29 05:38:44,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:38:44,745 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 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 43 [2023-11-29 05:38:44,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:38:44,746 INFO L225 Difference]: With dead ends: 61 [2023-11-29 05:38:44,747 INFO L226 Difference]: Without dead ends: 59 [2023-11-29 05:38:44,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 76 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:38:44,748 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:38:44,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 83 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:38:44,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-29 05:38:44,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2023-11-29 05:38:44,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 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) [2023-11-29 05:38:44,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2023-11-29 05:38:44,758 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 43 [2023-11-29 05:38:44,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:38:44,758 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2023-11-29 05:38:44,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 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) [2023-11-29 05:38:44,759 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2023-11-29 05:38:44,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 05:38:44,760 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:44,760 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:44,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 05:38:44,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 05:38:44,961 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:44,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:44,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1116419837, now seen corresponding path program 7 times [2023-11-29 05:38:44,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:44,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259470304] [2023-11-29 05:38:44,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:44,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 80 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:45,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:45,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259470304] [2023-11-29 05:38:45,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259470304] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:45,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543088086] [2023-11-29 05:38:45,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:38:45,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:45,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:45,245 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:45,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:38:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:45,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:38:45,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 96 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:45,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 96 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:45,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543088086] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:45,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:45,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 26 [2023-11-29 05:38:45,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155011110] [2023-11-29 05:38:45,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:45,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 05:38:45,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:45,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 05:38:45,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:38:45,755 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 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) [2023-11-29 05:38:45,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:38:45,964 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2023-11-29 05:38:45,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:38:45,965 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 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 51 [2023-11-29 05:38:45,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:38:45,966 INFO L225 Difference]: With dead ends: 115 [2023-11-29 05:38:45,966 INFO L226 Difference]: Without dead ends: 82 [2023-11-29 05:38:45,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 81 SyntacticMatches, 12 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 05:38:45,968 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 74 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:38:45,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 113 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:38:45,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-29 05:38:45,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2023-11-29 05:38:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 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) [2023-11-29 05:38:45,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2023-11-29 05:38:45,978 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 51 [2023-11-29 05:38:45,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:38:45,979 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2023-11-29 05:38:45,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 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) [2023-11-29 05:38:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2023-11-29 05:38:45,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 05:38:45,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:45,981 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:45,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 05:38:46,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:46,182 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:46,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:46,182 INFO L85 PathProgramCache]: Analyzing trace with hash 885943970, now seen corresponding path program 8 times [2023-11-29 05:38:46,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:46,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899101719] [2023-11-29 05:38:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:46,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 80 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:46,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:46,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899101719] [2023-11-29 05:38:46,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899101719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:46,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251533756] [2023-11-29 05:38:46,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:38:46,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:46,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:46,533 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:46,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:38:46,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:38:46,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:46,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:38:46,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 98 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:46,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 98 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:47,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251533756] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:47,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:47,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2023-11-29 05:38:47,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142561372] [2023-11-29 05:38:47,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:47,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 05:38:47,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:47,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 05:38:47,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:38:47,116 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 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) [2023-11-29 05:38:47,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:38:47,378 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2023-11-29 05:38:47,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 05:38:47,378 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 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 53 [2023-11-29 05:38:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:38:47,379 INFO L225 Difference]: With dead ends: 123 [2023-11-29 05:38:47,379 INFO L226 Difference]: Without dead ends: 88 [2023-11-29 05:38:47,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=329, Invalid=931, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 05:38:47,381 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 97 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:38:47,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 157 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:38:47,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-29 05:38:47,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2023-11-29 05:38:47,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 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) [2023-11-29 05:38:47,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2023-11-29 05:38:47,389 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 53 [2023-11-29 05:38:47,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:38:47,390 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2023-11-29 05:38:47,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 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) [2023-11-29 05:38:47,390 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2023-11-29 05:38:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 05:38:47,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:47,391 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:47,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:38:47,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:47,597 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:47,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:47,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1558032121, now seen corresponding path program 9 times [2023-11-29 05:38:47,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:47,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268293939] [2023-11-29 05:38:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:47,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 56 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:47,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:47,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268293939] [2023-11-29 05:38:47,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268293939] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:47,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123076943] [2023-11-29 05:38:47,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:38:47,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:47,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:47,850 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:47,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:38:47,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-29 05:38:47,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:47,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 05:38:47,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 72 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:48,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 72 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:48,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123076943] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:48,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:48,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 14 [2023-11-29 05:38:48,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521614229] [2023-11-29 05:38:48,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:48,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:38:48,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:48,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:38:48,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:38:48,209 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 states have internal predecessors, (78), 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) [2023-11-29 05:38:48,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:38:48,363 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2023-11-29 05:38:48,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 05:38:48,364 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 states have internal predecessors, (78), 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 55 [2023-11-29 05:38:48,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:38:48,364 INFO L225 Difference]: With dead ends: 73 [2023-11-29 05:38:48,364 INFO L226 Difference]: Without dead ends: 71 [2023-11-29 05:38:48,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 98 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:38:48,366 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:38:48,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 103 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:38:48,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-29 05:38:48,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2023-11-29 05:38:48,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 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) [2023-11-29 05:38:48,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2023-11-29 05:38:48,375 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 55 [2023-11-29 05:38:48,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:38:48,376 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2023-11-29 05:38:48,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 14 states have internal predecessors, (78), 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) [2023-11-29 05:38:48,376 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2023-11-29 05:38:48,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 05:38:48,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:48,377 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:48,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 05:38:48,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:48,578 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:48,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:48,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1075008531, now seen corresponding path program 10 times [2023-11-29 05:38:48,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:48,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679714547] [2023-11-29 05:38:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:48,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 138 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:49,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:49,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679714547] [2023-11-29 05:38:49,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679714547] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:49,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258508106] [2023-11-29 05:38:49,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:38:49,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:49,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:49,004 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:49,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:38:49,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:38:49,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:49,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 05:38:49,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 162 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:49,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 162 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:49,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258508106] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:49,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:49,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 35 [2023-11-29 05:38:49,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254447284] [2023-11-29 05:38:49,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:49,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 05:38:49,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:49,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 05:38:49,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 05:38:49,685 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 35 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 35 states have internal predecessors, (116), 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) [2023-11-29 05:38:50,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:38:50,051 INFO L93 Difference]: Finished difference Result 186 states and 211 transitions. [2023-11-29 05:38:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 05:38:50,051 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 35 states have internal predecessors, (116), 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 63 [2023-11-29 05:38:50,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:38:50,052 INFO L225 Difference]: With dead ends: 186 [2023-11-29 05:38:50,053 INFO L226 Difference]: Without dead ends: 108 [2023-11-29 05:38:50,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 97 SyntacticMatches, 15 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=719, Invalid=2143, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 05:38:50,056 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 162 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:38:50,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 163 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:38:50,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-29 05:38:50,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2023-11-29 05:38:50,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 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) [2023-11-29 05:38:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2023-11-29 05:38:50,064 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 63 [2023-11-29 05:38:50,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:38:50,065 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2023-11-29 05:38:50,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 35 states have internal predecessors, (116), 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) [2023-11-29 05:38:50,065 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2023-11-29 05:38:50,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-29 05:38:50,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:50,067 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:50,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 05:38:50,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:50,269 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:50,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:50,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1781856521, now seen corresponding path program 11 times [2023-11-29 05:38:50,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:50,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502858722] [2023-11-29 05:38:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:50,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 90 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:50,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:50,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502858722] [2023-11-29 05:38:50,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502858722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:50,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027346360] [2023-11-29 05:38:50,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:38:50,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:50,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:50,659 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:50,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:38:50,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-29 05:38:50,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:50,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 05:38:50,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 110 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:50,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 110 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:51,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027346360] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:51,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:51,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 16 [2023-11-29 05:38:51,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087055773] [2023-11-29 05:38:51,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:51,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:38:51,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:51,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:38:51,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:38:51,068 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 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) [2023-11-29 05:38:51,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:38:51,235 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2023-11-29 05:38:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 05:38:51,235 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 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 67 [2023-11-29 05:38:51,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:38:51,236 INFO L225 Difference]: With dead ends: 85 [2023-11-29 05:38:51,236 INFO L226 Difference]: Without dead ends: 83 [2023-11-29 05:38:51,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 19 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=291, Invalid=521, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:38:51,238 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 33 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:38:51,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 112 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:38:51,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-29 05:38:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2023-11-29 05:38:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 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) [2023-11-29 05:38:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2023-11-29 05:38:51,245 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 67 [2023-11-29 05:38:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:38:51,245 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2023-11-29 05:38:51,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 16 states have internal predecessors, (90), 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) [2023-11-29 05:38:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2023-11-29 05:38:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-29 05:38:51,246 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:51,247 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:51,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:38:51,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:51,447 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:51,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:51,448 INFO L85 PathProgramCache]: Analyzing trace with hash -315067939, now seen corresponding path program 12 times [2023-11-29 05:38:51,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:51,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366032532] [2023-11-29 05:38:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:51,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 212 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:52,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:52,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366032532] [2023-11-29 05:38:52,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366032532] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:52,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858021003] [2023-11-29 05:38:52,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:38:52,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:52,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:52,013 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:52,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:38:52,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-11-29 05:38:52,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:52,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 05:38:52,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 242 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:52,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 242 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:52,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858021003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:52,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:52,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 41 [2023-11-29 05:38:52,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334221750] [2023-11-29 05:38:52,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:52,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 05:38:52,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:52,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 05:38:52,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1246, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 05:38:52,874 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 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) [2023-11-29 05:38:53,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:38:53,355 INFO L93 Difference]: Finished difference Result 222 states and 251 transitions. [2023-11-29 05:38:53,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 05:38:53,356 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 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 75 [2023-11-29 05:38:53,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:38:53,357 INFO L225 Difference]: With dead ends: 222 [2023-11-29 05:38:53,357 INFO L226 Difference]: Without dead ends: 128 [2023-11-29 05:38:53,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 115 SyntacticMatches, 19 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1005, Invalid=3027, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 05:38:53,360 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 210 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:38:53,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 207 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:38:53,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-29 05:38:53,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 80. [2023-11-29 05:38:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 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) [2023-11-29 05:38:53,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2023-11-29 05:38:53,369 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 75 [2023-11-29 05:38:53,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:38:53,369 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2023-11-29 05:38:53,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 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) [2023-11-29 05:38:53,370 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2023-11-29 05:38:53,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-29 05:38:53,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:53,371 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:53,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:38:53,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 05:38:53,572 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:53,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:53,573 INFO L85 PathProgramCache]: Analyzing trace with hash -897282585, now seen corresponding path program 13 times [2023-11-29 05:38:53,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:53,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657002055] [2023-11-29 05:38:53,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:53,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 132 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:53,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:53,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657002055] [2023-11-29 05:38:53,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657002055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:53,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805406187] [2023-11-29 05:38:53,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:38:53,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:53,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:53,985 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:53,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:38:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:54,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 05:38:54,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 156 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:54,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 156 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:54,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805406187] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:54,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:54,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 18 [2023-11-29 05:38:54,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098368801] [2023-11-29 05:38:54,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:54,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 05:38:54,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:54,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 05:38:54,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:38:54,394 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 18 states have internal predecessors, (102), 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) [2023-11-29 05:38:54,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:38:54,576 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2023-11-29 05:38:54,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 05:38:54,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 18 states have internal predecessors, (102), 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 79 [2023-11-29 05:38:54,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:38:54,577 INFO L225 Difference]: With dead ends: 97 [2023-11-29 05:38:54,577 INFO L226 Difference]: Without dead ends: 95 [2023-11-29 05:38:54,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 142 SyntacticMatches, 23 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=676, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 05:38:54,579 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:38:54,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 137 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:38:54,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-29 05:38:54,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2023-11-29 05:38:54,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 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) [2023-11-29 05:38:54,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2023-11-29 05:38:54,584 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 79 [2023-11-29 05:38:54,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:38:54,585 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2023-11-29 05:38:54,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 18 states have internal predecessors, (102), 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) [2023-11-29 05:38:54,585 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2023-11-29 05:38:54,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-29 05:38:54,586 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:54,586 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:54,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:38:54,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:38:54,787 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:54,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:54,787 INFO L85 PathProgramCache]: Analyzing trace with hash 724830413, now seen corresponding path program 14 times [2023-11-29 05:38:54,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:54,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033468354] [2023-11-29 05:38:54,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:54,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 302 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:55,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:55,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033468354] [2023-11-29 05:38:55,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033468354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:55,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465668476] [2023-11-29 05:38:55,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:38:55,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:55,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:55,492 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:55,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:38:55,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:38:55,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:55,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 05:38:55,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 336 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:56,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 336 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:38:56,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465668476] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:56,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:56,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 44 [2023-11-29 05:38:56,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896168807] [2023-11-29 05:38:56,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:56,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 05:38:56,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:56,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 05:38:56,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1454, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 05:38:56,391 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 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) [2023-11-29 05:38:56,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:38:56,747 INFO L93 Difference]: Finished difference Result 199 states and 229 transitions. [2023-11-29 05:38:56,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 05:38:56,748 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 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 87 [2023-11-29 05:38:56,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:38:56,749 INFO L225 Difference]: With dead ends: 199 [2023-11-29 05:38:56,749 INFO L226 Difference]: Without dead ends: 142 [2023-11-29 05:38:56,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 135 SyntacticMatches, 24 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=804, Invalid=2388, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 05:38:56,751 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 195 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:38:56,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 271 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:38:56,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-29 05:38:56,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 90. [2023-11-29 05:38:56,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 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) [2023-11-29 05:38:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2023-11-29 05:38:56,758 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 87 [2023-11-29 05:38:56,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:38:56,758 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2023-11-29 05:38:56,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 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) [2023-11-29 05:38:56,758 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2023-11-29 05:38:56,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 05:38:56,759 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:56,759 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:56,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:38:56,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:38:56,959 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:56,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:56,960 INFO L85 PathProgramCache]: Analyzing trace with hash 831721970, now seen corresponding path program 15 times [2023-11-29 05:38:56,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:56,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827679055] [2023-11-29 05:38:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:56,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 302 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:57,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:57,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827679055] [2023-11-29 05:38:57,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827679055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:57,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357189816] [2023-11-29 05:38:57,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:38:57,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:57,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:57,534 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:57,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:38:57,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-11-29 05:38:57,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:57,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 05:38:57,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:58,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:58,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357189816] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:58,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:58,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2023-11-29 05:38:58,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097310088] [2023-11-29 05:38:58,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:58,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-29 05:38:58,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:58,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-29 05:38:58,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1587, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 05:38:58,473 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 46 states, 46 states have (on average 3.239130434782609) internal successors, (149), 46 states have internal predecessors, (149), 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) [2023-11-29 05:38:58,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:38:58,904 INFO L93 Difference]: Finished difference Result 207 states and 239 transitions. [2023-11-29 05:38:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 05:38:58,905 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.239130434782609) internal successors, (149), 46 states have internal predecessors, (149), 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 89 [2023-11-29 05:38:58,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:38:58,906 INFO L225 Difference]: With dead ends: 207 [2023-11-29 05:38:58,906 INFO L226 Difference]: Without dead ends: 148 [2023-11-29 05:38:58,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 136 SyntacticMatches, 26 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 05:38:58,908 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 199 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:38:58,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 303 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:38:58,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-29 05:38:58,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 92. [2023-11-29 05:38:58,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 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) [2023-11-29 05:38:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2023-11-29 05:38:58,917 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 89 [2023-11-29 05:38:58,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:38:58,917 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2023-11-29 05:38:58,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.239130434782609) internal successors, (149), 46 states have internal predecessors, (149), 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) [2023-11-29 05:38:58,917 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2023-11-29 05:38:58,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-29 05:38:58,918 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:38:58,918 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:58,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:38:59,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:38:59,119 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:38:59,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:59,120 INFO L85 PathProgramCache]: Analyzing trace with hash 475293143, now seen corresponding path program 16 times [2023-11-29 05:38:59,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:59,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900762741] [2023-11-29 05:38:59,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:59,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 182 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:59,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:59,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900762741] [2023-11-29 05:38:59,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900762741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:59,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283564757] [2023-11-29 05:38:59,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:38:59,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:59,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:59,649 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:59,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:38:59,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:38:59,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:59,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 05:38:59,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:59,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:00,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283564757] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:00,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:00,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 20 [2023-11-29 05:39:00,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828579671] [2023-11-29 05:39:00,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:00,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:39:00,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:00,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:39:00,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:39:00,166 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 20 states have internal predecessors, (114), 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) [2023-11-29 05:39:00,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:00,390 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2023-11-29 05:39:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 05:39:00,391 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 20 states have internal predecessors, (114), 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 91 [2023-11-29 05:39:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:00,392 INFO L225 Difference]: With dead ends: 109 [2023-11-29 05:39:00,392 INFO L226 Difference]: Without dead ends: 107 [2023-11-29 05:39:00,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 164 SyntacticMatches, 27 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=481, Invalid=851, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 05:39:00,394 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:00,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 146 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:39:00,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-29 05:39:00,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2023-11-29 05:39:00,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2023-11-29 05:39:00,402 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 91 [2023-11-29 05:39:00,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:00,403 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2023-11-29 05:39:00,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 20 states have internal predecessors, (114), 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) [2023-11-29 05:39:00,403 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2023-11-29 05:39:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-29 05:39:00,404 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:00,404 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:00,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 05:39:00,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:00,605 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:00,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:00,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1218121539, now seen corresponding path program 17 times [2023-11-29 05:39:00,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:00,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539720548] [2023-11-29 05:39:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:00,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 408 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:01,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:01,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539720548] [2023-11-29 05:39:01,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539720548] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:01,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881146854] [2023-11-29 05:39:01,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:39:01,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:01,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:01,423 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:01,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:39:01,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-11-29 05:39:01,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:01,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 05:39:01,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 450 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:02,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 450 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:02,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881146854] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:02,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:02,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2023-11-29 05:39:02,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868128991] [2023-11-29 05:39:02,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:02,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 05:39:02,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:02,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 05:39:02,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=2106, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 05:39:02,605 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 53 states, 53 states have (on average 3.3207547169811322) internal successors, (176), 53 states have internal predecessors, (176), 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) [2023-11-29 05:39:03,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:03,386 INFO L93 Difference]: Finished difference Result 294 states and 331 transitions. [2023-11-29 05:39:03,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 05:39:03,386 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.3207547169811322) internal successors, (176), 53 states have internal predecessors, (176), 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 99 [2023-11-29 05:39:03,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:03,388 INFO L225 Difference]: With dead ends: 294 [2023-11-29 05:39:03,388 INFO L226 Difference]: Without dead ends: 168 [2023-11-29 05:39:03,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 151 SyntacticMatches, 27 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2260 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1721, Invalid=5251, Unknown=0, NotChecked=0, Total=6972 [2023-11-29 05:39:03,391 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 231 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:03,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 445 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:39:03,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-29 05:39:03,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 104. [2023-11-29 05:39:03,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 103 states have internal predecessors, (107), 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) [2023-11-29 05:39:03,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2023-11-29 05:39:03,400 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 99 [2023-11-29 05:39:03,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:03,401 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2023-11-29 05:39:03,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.3207547169811322) internal successors, (176), 53 states have internal predecessors, (176), 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) [2023-11-29 05:39:03,401 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2023-11-29 05:39:03,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-29 05:39:03,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:03,402 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:03,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 05:39:03,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:03,602 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:03,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:03,603 INFO L85 PathProgramCache]: Analyzing trace with hash -486535481, now seen corresponding path program 18 times [2023-11-29 05:39:03,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:03,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554408390] [2023-11-29 05:39:03,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:03,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 240 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:04,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:04,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554408390] [2023-11-29 05:39:04,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554408390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:04,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965800077] [2023-11-29 05:39:04,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:39:04,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:04,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:04,245 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:04,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:39:04,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-11-29 05:39:04,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:04,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 05:39:04,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:04,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:04,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965800077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:04,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:04,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 22 [2023-11-29 05:39:04,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856783343] [2023-11-29 05:39:04,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:04,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:39:04,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:04,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:39:04,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:39:04,878 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:05,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:05,173 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2023-11-29 05:39:05,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 05:39:05,174 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-11-29 05:39:05,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:05,175 INFO L225 Difference]: With dead ends: 121 [2023-11-29 05:39:05,175 INFO L226 Difference]: Without dead ends: 119 [2023-11-29 05:39:05,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 186 SyntacticMatches, 31 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=594, Invalid=1046, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 05:39:05,177 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 28 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:05,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 182 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:39:05,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-29 05:39:05,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2023-11-29 05:39:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 111 states have internal predecessors, (115), 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) [2023-11-29 05:39:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2023-11-29 05:39:05,192 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 103 [2023-11-29 05:39:05,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:05,193 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2023-11-29 05:39:05,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:05,193 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2023-11-29 05:39:05,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-29 05:39:05,194 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:05,194 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:05,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 05:39:05,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:05,395 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:05,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:05,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1945065043, now seen corresponding path program 19 times [2023-11-29 05:39:05,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:05,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337193406] [2023-11-29 05:39:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:05,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 530 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:06,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:06,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337193406] [2023-11-29 05:39:06,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337193406] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:06,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319339801] [2023-11-29 05:39:06,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:39:06,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:06,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:06,238 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:06,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:39:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:06,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 05:39:06,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 576 proven. 272 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:39:07,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 576 proven. 272 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:39:07,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319339801] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:07,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:07,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 56 [2023-11-29 05:39:07,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898699279] [2023-11-29 05:39:07,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:07,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-29 05:39:07,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:07,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-29 05:39:07,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=2374, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 05:39:07,497 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 56 states, 56 states have (on average 3.3392857142857144) internal successors, (187), 56 states have internal predecessors, (187), 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) [2023-11-29 05:39:08,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:08,044 INFO L93 Difference]: Finished difference Result 255 states and 293 transitions. [2023-11-29 05:39:08,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 05:39:08,044 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.3392857142857144) internal successors, (187), 56 states have internal predecessors, (187), 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 111 [2023-11-29 05:39:08,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:08,046 INFO L225 Difference]: With dead ends: 255 [2023-11-29 05:39:08,046 INFO L226 Difference]: Without dead ends: 182 [2023-11-29 05:39:08,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 171 SyntacticMatches, 32 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1947 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1320, Invalid=3936, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 05:39:08,048 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 179 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:08,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 407 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:39:08,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-29 05:39:08,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 114. [2023-11-29 05:39:08,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0353982300884956) internal successors, (117), 113 states have internal predecessors, (117), 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) [2023-11-29 05:39:08,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2023-11-29 05:39:08,056 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 111 [2023-11-29 05:39:08,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:08,056 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2023-11-29 05:39:08,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.3392857142857144) internal successors, (187), 56 states have internal predecessors, (187), 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) [2023-11-29 05:39:08,057 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2023-11-29 05:39:08,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-29 05:39:08,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:08,057 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:08,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 05:39:08,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:08,258 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:08,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:08,258 INFO L85 PathProgramCache]: Analyzing trace with hash -216017966, now seen corresponding path program 20 times [2023-11-29 05:39:08,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:08,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030170066] [2023-11-29 05:39:08,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:08,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 530 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:08,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:08,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030170066] [2023-11-29 05:39:08,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030170066] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:08,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400355264] [2023-11-29 05:39:08,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:39:08,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:08,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:08,941 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:08,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 05:39:09,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:39:09,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:09,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 05:39:09,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:09,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:10,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400355264] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:10,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:10,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2023-11-29 05:39:10,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046662275] [2023-11-29 05:39:10,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:10,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-29 05:39:10,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:10,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-29 05:39:10,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=2543, Unknown=0, NotChecked=0, Total=3306 [2023-11-29 05:39:10,156 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 58 states, 58 states have (on average 3.2586206896551726) internal successors, (189), 58 states have internal predecessors, (189), 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) [2023-11-29 05:39:10,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:10,663 INFO L93 Difference]: Finished difference Result 263 states and 303 transitions. [2023-11-29 05:39:10,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 05:39:10,664 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.2586206896551726) internal successors, (189), 58 states have internal predecessors, (189), 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 113 [2023-11-29 05:39:10,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:10,665 INFO L225 Difference]: With dead ends: 263 [2023-11-29 05:39:10,665 INFO L226 Difference]: Without dead ends: 188 [2023-11-29 05:39:10,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 172 SyntacticMatches, 34 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2100 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1449, Invalid=4251, Unknown=0, NotChecked=0, Total=5700 [2023-11-29 05:39:10,668 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 279 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:10,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 360 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:39:10,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-29 05:39:10,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 116. [2023-11-29 05:39:10,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0347826086956522) internal successors, (119), 115 states have internal predecessors, (119), 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) [2023-11-29 05:39:10,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2023-11-29 05:39:10,675 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 113 [2023-11-29 05:39:10,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:10,675 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2023-11-29 05:39:10,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.2586206896551726) internal successors, (189), 58 states have internal predecessors, (189), 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) [2023-11-29 05:39:10,676 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2023-11-29 05:39:10,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-29 05:39:10,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:10,676 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:10,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 05:39:10,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 05:39:10,877 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:10,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:10,877 INFO L85 PathProgramCache]: Analyzing trace with hash -754120521, now seen corresponding path program 21 times [2023-11-29 05:39:10,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:10,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557587864] [2023-11-29 05:39:10,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:10,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 306 proven. 614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:11,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:11,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557587864] [2023-11-29 05:39:11,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557587864] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:11,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266570369] [2023-11-29 05:39:11,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:39:11,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:11,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:11,448 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:11,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 05:39:11,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2023-11-29 05:39:11,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:11,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 05:39:11,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:11,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:12,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266570369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:12,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:12,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 24 [2023-11-29 05:39:12,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796519563] [2023-11-29 05:39:12,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:12,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 05:39:12,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:12,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 05:39:12,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:39:12,168 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand has 25 states, 25 states have (on average 5.52) internal successors, (138), 24 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:12,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:12,468 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2023-11-29 05:39:12,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 05:39:12,468 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 24 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2023-11-29 05:39:12,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:12,470 INFO L225 Difference]: With dead ends: 133 [2023-11-29 05:39:12,470 INFO L226 Difference]: Without dead ends: 131 [2023-11-29 05:39:12,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 208 SyntacticMatches, 35 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=719, Invalid=1261, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 05:39:12,471 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:12,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 198 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:39:12,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-29 05:39:12,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2023-11-29 05:39:12,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.032520325203252) internal successors, (127), 123 states have internal predecessors, (127), 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) [2023-11-29 05:39:12,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2023-11-29 05:39:12,478 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 115 [2023-11-29 05:39:12,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:12,479 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2023-11-29 05:39:12,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 24 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:12,479 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2023-11-29 05:39:12,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-29 05:39:12,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:12,480 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:12,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-29 05:39:12,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 05:39:12,680 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:12,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:12,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1077719965, now seen corresponding path program 22 times [2023-11-29 05:39:12,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:12,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744478475] [2023-11-29 05:39:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:12,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 668 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:13,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:13,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744478475] [2023-11-29 05:39:13,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744478475] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:13,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166447844] [2023-11-29 05:39:13,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:39:13,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:13,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:13,665 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:13,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 05:39:13,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:39:13,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:13,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 05:39:13,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 722 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:14,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:15,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 722 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:15,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166447844] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:15,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:15,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 65 [2023-11-29 05:39:15,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192339767] [2023-11-29 05:39:15,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:15,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-29 05:39:15,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:15,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-29 05:39:15,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=970, Invalid=3190, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 05:39:15,234 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 65 states, 65 states have (on average 3.3230769230769233) internal successors, (216), 65 states have internal predecessors, (216), 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) [2023-11-29 05:39:16,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:16,313 INFO L93 Difference]: Finished difference Result 366 states and 411 transitions. [2023-11-29 05:39:16,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-29 05:39:16,313 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.3230769230769233) internal successors, (216), 65 states have internal predecessors, (216), 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 123 [2023-11-29 05:39:16,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:16,315 INFO L225 Difference]: With dead ends: 366 [2023-11-29 05:39:16,315 INFO L226 Difference]: Without dead ends: 208 [2023-11-29 05:39:16,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 187 SyntacticMatches, 35 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3514 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2629, Invalid=8083, Unknown=0, NotChecked=0, Total=10712 [2023-11-29 05:39:16,317 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 399 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:16,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 551 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:39:16,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-29 05:39:16,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 128. [2023-11-29 05:39:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.031496062992126) internal successors, (131), 127 states have internal predecessors, (131), 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) [2023-11-29 05:39:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2023-11-29 05:39:16,329 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 123 [2023-11-29 05:39:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:16,329 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2023-11-29 05:39:16,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.3230769230769233) internal successors, (216), 65 states have internal predecessors, (216), 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) [2023-11-29 05:39:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2023-11-29 05:39:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-29 05:39:16,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:16,330 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:16,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 05:39:16,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 05:39:16,531 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:16,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:16,531 INFO L85 PathProgramCache]: Analyzing trace with hash -574565465, now seen corresponding path program 23 times [2023-11-29 05:39:16,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:16,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150517091] [2023-11-29 05:39:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:16,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 380 proven. 762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:17,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:17,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150517091] [2023-11-29 05:39:17,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150517091] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:17,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234383096] [2023-11-29 05:39:17,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:39:17,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:17,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:17,110 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:17,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 05:39:17,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2023-11-29 05:39:17,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:17,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 05:39:17,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:17,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:17,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234383096] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:17,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:17,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 26 [2023-11-29 05:39:17,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156001691] [2023-11-29 05:39:17,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:17,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 05:39:17,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:17,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 05:39:17,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:39:17,884 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 26 states have internal predecessors, (150), 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) [2023-11-29 05:39:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:18,198 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2023-11-29 05:39:18,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 05:39:18,198 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 26 states have internal predecessors, (150), 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 127 [2023-11-29 05:39:18,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:18,199 INFO L225 Difference]: With dead ends: 145 [2023-11-29 05:39:18,199 INFO L226 Difference]: Without dead ends: 143 [2023-11-29 05:39:18,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 230 SyntacticMatches, 39 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=856, Invalid=1496, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 05:39:18,200 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:18,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 202 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:39:18,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-29 05:39:18,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2023-11-29 05:39:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 135 states have internal predecessors, (139), 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) [2023-11-29 05:39:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2023-11-29 05:39:18,209 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 127 [2023-11-29 05:39:18,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:18,209 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2023-11-29 05:39:18,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 26 states have internal predecessors, (150), 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) [2023-11-29 05:39:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2023-11-29 05:39:18,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-29 05:39:18,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:18,209 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:18,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 05:39:18,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 05:39:18,410 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:18,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:18,410 INFO L85 PathProgramCache]: Analyzing trace with hash -407990643, now seen corresponding path program 24 times [2023-11-29 05:39:18,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:18,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75377121] [2023-11-29 05:39:18,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:18,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 822 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:19,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:19,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75377121] [2023-11-29 05:39:19,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75377121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:19,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99478345] [2023-11-29 05:39:19,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:39:19,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:19,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:19,450 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:19,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 05:39:19,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2023-11-29 05:39:19,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:19,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 05:39:19,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 882 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:20,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 882 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:21,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99478345] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:21,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:21,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 71 [2023-11-29 05:39:21,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526143076] [2023-11-29 05:39:21,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:21,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-29 05:39:21,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:21,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-29 05:39:21,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1154, Invalid=3816, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 05:39:21,348 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand has 71 states, 71 states have (on average 3.323943661971831) internal successors, (236), 71 states have internal predecessors, (236), 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) [2023-11-29 05:39:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:22,622 INFO L93 Difference]: Finished difference Result 402 states and 451 transitions. [2023-11-29 05:39:22,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-29 05:39:22,622 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.323943661971831) internal successors, (236), 71 states have internal predecessors, (236), 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 135 [2023-11-29 05:39:22,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:22,623 INFO L225 Difference]: With dead ends: 402 [2023-11-29 05:39:22,623 INFO L226 Difference]: Without dead ends: 228 [2023-11-29 05:39:22,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 205 SyntacticMatches, 39 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4243 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3155, Invalid=9727, Unknown=0, NotChecked=0, Total=12882 [2023-11-29 05:39:22,625 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 395 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:22,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 518 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:39:22,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-11-29 05:39:22,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 140. [2023-11-29 05:39:22,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 139 states have internal predecessors, (143), 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) [2023-11-29 05:39:22,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2023-11-29 05:39:22,634 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 135 [2023-11-29 05:39:22,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:22,634 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2023-11-29 05:39:22,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.323943661971831) internal successors, (236), 71 states have internal predecessors, (236), 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) [2023-11-29 05:39:22,634 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2023-11-29 05:39:22,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 05:39:22,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:22,635 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:22,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 05:39:22,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 05:39:22,836 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:22,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:22,836 INFO L85 PathProgramCache]: Analyzing trace with hash 287371159, now seen corresponding path program 25 times [2023-11-29 05:39:22,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:22,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000193595] [2023-11-29 05:39:22,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:22,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 462 proven. 926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:23,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:23,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000193595] [2023-11-29 05:39:23,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000193595] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:23,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715028094] [2023-11-29 05:39:23,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:39:23,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:23,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:23,589 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:23,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 05:39:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:23,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 05:39:23,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:23,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:24,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715028094] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:24,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:24,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 28 [2023-11-29 05:39:24,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433508802] [2023-11-29 05:39:24,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:24,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 05:39:24,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:24,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 05:39:24,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:39:24,345 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand has 29 states, 29 states have (on average 5.586206896551724) internal successors, (162), 28 states have internal predecessors, (162), 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) [2023-11-29 05:39:24,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:24,669 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2023-11-29 05:39:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 05:39:24,669 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.586206896551724) internal successors, (162), 28 states have internal predecessors, (162), 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 139 [2023-11-29 05:39:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:24,671 INFO L225 Difference]: With dead ends: 157 [2023-11-29 05:39:24,671 INFO L226 Difference]: Without dead ends: 155 [2023-11-29 05:39:24,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 252 SyntacticMatches, 43 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1005, Invalid=1751, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 05:39:24,672 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 61 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:24,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 201 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:39:24,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-29 05:39:24,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2023-11-29 05:39:24,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0272108843537415) internal successors, (151), 147 states have internal predecessors, (151), 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) [2023-11-29 05:39:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2023-11-29 05:39:24,681 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 139 [2023-11-29 05:39:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:24,681 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2023-11-29 05:39:24,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.586206896551724) internal successors, (162), 28 states have internal predecessors, (162), 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) [2023-11-29 05:39:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2023-11-29 05:39:24,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-29 05:39:24,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:24,681 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:24,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 05:39:24,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 05:39:24,882 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:24,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:24,882 INFO L85 PathProgramCache]: Analyzing trace with hash -219432323, now seen corresponding path program 26 times [2023-11-29 05:39:24,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:24,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182241541] [2023-11-29 05:39:24,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:24,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 992 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:25,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:25,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182241541] [2023-11-29 05:39:25,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182241541] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:25,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471611116] [2023-11-29 05:39:25,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:39:25,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:25,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:25,927 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:25,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 05:39:26,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:39:26,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:26,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 05:39:26,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:39:27,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:39:27,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471611116] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:27,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:27,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 74 [2023-11-29 05:39:27,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445084425] [2023-11-29 05:39:27,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:27,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-11-29 05:39:27,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:27,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-11-29 05:39:27,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=4174, Unknown=0, NotChecked=0, Total=5402 [2023-11-29 05:39:27,842 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand has 74 states, 74 states have (on average 3.3378378378378377) internal successors, (247), 74 states have internal predecessors, (247), 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) [2023-11-29 05:39:28,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:28,693 INFO L93 Difference]: Finished difference Result 339 states and 389 transitions. [2023-11-29 05:39:28,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 05:39:28,693 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.3378378378378377) internal successors, (247), 74 states have internal predecessors, (247), 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 147 [2023-11-29 05:39:28,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:28,695 INFO L225 Difference]: With dead ends: 339 [2023-11-29 05:39:28,695 INFO L226 Difference]: Without dead ends: 242 [2023-11-29 05:39:28,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 225 SyntacticMatches, 44 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3471 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2334, Invalid=6978, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 05:39:28,697 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 338 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:28,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 475 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:39:28,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-11-29 05:39:28,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 150. [2023-11-29 05:39:28,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0268456375838926) internal successors, (153), 149 states have internal predecessors, (153), 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) [2023-11-29 05:39:28,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2023-11-29 05:39:28,706 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 147 [2023-11-29 05:39:28,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:28,706 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2023-11-29 05:39:28,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.3378378378378377) internal successors, (247), 74 states have internal predecessors, (247), 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) [2023-11-29 05:39:28,706 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2023-11-29 05:39:28,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-29 05:39:28,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:28,707 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:28,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 05:39:28,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 05:39:28,907 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:28,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:28,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1636862430, now seen corresponding path program 27 times [2023-11-29 05:39:28,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:28,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315048263] [2023-11-29 05:39:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:28,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 992 proven. 618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:30,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:30,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315048263] [2023-11-29 05:39:30,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315048263] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:30,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772292960] [2023-11-29 05:39:30,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:39:30,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:30,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:30,192 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:30,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 05:39:30,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-11-29 05:39:30,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:30,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 05:39:30,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 1058 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:31,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 1058 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:32,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772292960] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:32,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:32,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 76 [2023-11-29 05:39:32,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221823714] [2023-11-29 05:39:32,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:32,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-11-29 05:39:32,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:32,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-11-29 05:39:32,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1303, Invalid=4397, Unknown=0, NotChecked=0, Total=5700 [2023-11-29 05:39:32,315 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 76 states, 76 states have (on average 3.276315789473684) internal successors, (249), 76 states have internal predecessors, (249), 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) [2023-11-29 05:39:33,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:33,170 INFO L93 Difference]: Finished difference Result 347 states and 399 transitions. [2023-11-29 05:39:33,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 05:39:33,170 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.276315789473684) internal successors, (249), 76 states have internal predecessors, (249), 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 149 [2023-11-29 05:39:33,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:33,172 INFO L225 Difference]: With dead ends: 347 [2023-11-29 05:39:33,172 INFO L226 Difference]: Without dead ends: 248 [2023-11-29 05:39:33,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 226 SyntacticMatches, 46 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3672 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2505, Invalid=7395, Unknown=0, NotChecked=0, Total=9900 [2023-11-29 05:39:33,174 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 336 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:33,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 623 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:39:33,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-29 05:39:33,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 152. [2023-11-29 05:39:33,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 151 states have internal predecessors, (155), 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) [2023-11-29 05:39:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2023-11-29 05:39:33,184 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 149 [2023-11-29 05:39:33,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:33,185 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2023-11-29 05:39:33,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.276315789473684) internal successors, (249), 76 states have internal predecessors, (249), 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) [2023-11-29 05:39:33,185 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2023-11-29 05:39:33,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-29 05:39:33,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:33,186 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:33,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 05:39:33,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:33,386 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:33,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:33,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2012404871, now seen corresponding path program 28 times [2023-11-29 05:39:33,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:33,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956779856] [2023-11-29 05:39:33,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:33,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 552 proven. 1106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:34,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:34,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956779856] [2023-11-29 05:39:34,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956779856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:34,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138336050] [2023-11-29 05:39:34,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:39:34,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:34,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:34,135 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:34,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 05:39:34,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:39:34,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:34,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 05:39:34,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 600 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:34,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 600 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:34,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138336050] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:34,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:34,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 30 [2023-11-29 05:39:34,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008828031] [2023-11-29 05:39:34,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:34,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 05:39:34,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:34,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 05:39:34,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2023-11-29 05:39:34,935 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand has 31 states, 31 states have (on average 5.612903225806452) internal successors, (174), 30 states have internal predecessors, (174), 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) [2023-11-29 05:39:35,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:35,301 INFO L93 Difference]: Finished difference Result 169 states and 173 transitions. [2023-11-29 05:39:35,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 05:39:35,301 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.612903225806452) internal successors, (174), 30 states have internal predecessors, (174), 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 151 [2023-11-29 05:39:35,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:35,302 INFO L225 Difference]: With dead ends: 169 [2023-11-29 05:39:35,302 INFO L226 Difference]: Without dead ends: 167 [2023-11-29 05:39:35,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 274 SyntacticMatches, 47 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1166, Invalid=2026, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 05:39:35,304 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 65 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:35,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 215 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:39:35,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-29 05:39:35,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2023-11-29 05:39:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0251572327044025) internal successors, (163), 159 states have internal predecessors, (163), 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) [2023-11-29 05:39:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2023-11-29 05:39:35,314 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 151 [2023-11-29 05:39:35,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:35,314 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2023-11-29 05:39:35,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.612903225806452) internal successors, (174), 30 states have internal predecessors, (174), 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) [2023-11-29 05:39:35,314 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2023-11-29 05:39:35,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-29 05:39:35,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:35,315 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:35,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 05:39:35,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 05:39:35,516 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:35,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:35,516 INFO L85 PathProgramCache]: Analyzing trace with hash 255440749, now seen corresponding path program 29 times [2023-11-29 05:39:35,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:35,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874015776] [2023-11-29 05:39:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:35,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1178 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:36,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:36,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874015776] [2023-11-29 05:39:36,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874015776] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:36,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98058985] [2023-11-29 05:39:36,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:39:36,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:36,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:36,697 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:36,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 05:39:36,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2023-11-29 05:39:36,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:36,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 05:39:36,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1250 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:37,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1250 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:38,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98058985] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:38,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:38,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 83 [2023-11-29 05:39:38,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327724727] [2023-11-29 05:39:38,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:38,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-11-29 05:39:38,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:38,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-11-29 05:39:38,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1570, Invalid=5236, Unknown=0, NotChecked=0, Total=6806 [2023-11-29 05:39:38,778 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 83 states, 83 states have (on average 3.325301204819277) internal successors, (276), 83 states have internal predecessors, (276), 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) [2023-11-29 05:39:40,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:40,113 INFO L93 Difference]: Finished difference Result 474 states and 531 transitions. [2023-11-29 05:39:40,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-29 05:39:40,113 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.325301204819277) internal successors, (276), 83 states have internal predecessors, (276), 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 159 [2023-11-29 05:39:40,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:40,114 INFO L225 Difference]: With dead ends: 474 [2023-11-29 05:39:40,114 INFO L226 Difference]: Without dead ends: 268 [2023-11-29 05:39:40,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 241 SyntacticMatches, 47 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5905 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4351, Invalid=13471, Unknown=0, NotChecked=0, Total=17822 [2023-11-29 05:39:40,116 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 435 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:40,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 812 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:39:40,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-11-29 05:39:40,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 164. [2023-11-29 05:39:40,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0245398773006136) internal successors, (167), 163 states have internal predecessors, (167), 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) [2023-11-29 05:39:40,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 167 transitions. [2023-11-29 05:39:40,125 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 167 transitions. Word has length 159 [2023-11-29 05:39:40,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:40,125 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 167 transitions. [2023-11-29 05:39:40,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.325301204819277) internal successors, (276), 83 states have internal predecessors, (276), 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) [2023-11-29 05:39:40,126 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 167 transitions. [2023-11-29 05:39:40,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-29 05:39:40,126 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:40,126 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:40,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 05:39:40,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 05:39:40,327 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:40,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:40,327 INFO L85 PathProgramCache]: Analyzing trace with hash -105112969, now seen corresponding path program 30 times [2023-11-29 05:39:40,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:40,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630517811] [2023-11-29 05:39:40,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:40,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 650 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:41,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:41,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630517811] [2023-11-29 05:39:41,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630517811] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:41,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992434093] [2023-11-29 05:39:41,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:39:41,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:41,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:41,126 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:41,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 05:39:41,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2023-11-29 05:39:41,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:41,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 05:39:41,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 702 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:41,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 702 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:42,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992434093] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:42,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:42,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 32 [2023-11-29 05:39:42,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157880507] [2023-11-29 05:39:42,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:42,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 05:39:42,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:42,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 05:39:42,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 05:39:42,032 INFO L87 Difference]: Start difference. First operand 164 states and 167 transitions. Second operand has 33 states, 33 states have (on average 5.636363636363637) internal successors, (186), 32 states have internal predecessors, (186), 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) [2023-11-29 05:39:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:42,377 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2023-11-29 05:39:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-29 05:39:42,378 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.636363636363637) internal successors, (186), 32 states have internal predecessors, (186), 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 163 [2023-11-29 05:39:42,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:42,379 INFO L225 Difference]: With dead ends: 181 [2023-11-29 05:39:42,379 INFO L226 Difference]: Without dead ends: 179 [2023-11-29 05:39:42,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 296 SyntacticMatches, 51 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1339, Invalid=2321, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 05:39:42,380 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 38 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:42,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 283 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:39:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-29 05:39:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 172. [2023-11-29 05:39:42,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.023391812865497) internal successors, (175), 171 states have internal predecessors, (175), 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) [2023-11-29 05:39:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2023-11-29 05:39:42,392 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 163 [2023-11-29 05:39:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:42,392 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2023-11-29 05:39:42,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.636363636363637) internal successors, (186), 32 states have internal predecessors, (186), 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) [2023-11-29 05:39:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2023-11-29 05:39:42,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-29 05:39:42,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:42,394 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:42,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 05:39:42,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 05:39:42,594 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:42,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:42,594 INFO L85 PathProgramCache]: Analyzing trace with hash 111019357, now seen corresponding path program 31 times [2023-11-29 05:39:42,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:42,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848159858] [2023-11-29 05:39:42,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:42,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1380 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:44,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:44,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848159858] [2023-11-29 05:39:44,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848159858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:44,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995508028] [2023-11-29 05:39:44,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:39:44,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:44,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:44,048 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:44,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 05:39:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:44,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-29 05:39:44,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1456 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:39:45,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1456 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:39:46,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995508028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:46,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:46,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 86 [2023-11-29 05:39:46,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530296927] [2023-11-29 05:39:46,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:46,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-11-29 05:39:46,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:46,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-11-29 05:39:46,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1656, Invalid=5654, Unknown=0, NotChecked=0, Total=7310 [2023-11-29 05:39:46,390 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand has 86 states, 86 states have (on average 3.3372093023255816) internal successors, (287), 86 states have internal predecessors, (287), 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) [2023-11-29 05:39:47,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:47,320 INFO L93 Difference]: Finished difference Result 395 states and 453 transitions. [2023-11-29 05:39:47,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 05:39:47,320 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.3372093023255816) internal successors, (287), 86 states have internal predecessors, (287), 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 171 [2023-11-29 05:39:47,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:47,321 INFO L225 Difference]: With dead ends: 395 [2023-11-29 05:39:47,321 INFO L226 Difference]: Without dead ends: 282 [2023-11-29 05:39:47,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 261 SyntacticMatches, 52 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4727 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3170, Invalid=9486, Unknown=0, NotChecked=0, Total=12656 [2023-11-29 05:39:47,323 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 341 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:47,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 556 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:39:47,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-11-29 05:39:47,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 174. [2023-11-29 05:39:47,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.023121387283237) internal successors, (177), 173 states have internal predecessors, (177), 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) [2023-11-29 05:39:47,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 177 transitions. [2023-11-29 05:39:47,333 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 177 transitions. Word has length 171 [2023-11-29 05:39:47,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:47,333 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 177 transitions. [2023-11-29 05:39:47,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.3372093023255816) internal successors, (287), 86 states have internal predecessors, (287), 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) [2023-11-29 05:39:47,334 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 177 transitions. [2023-11-29 05:39:47,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-29 05:39:47,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:47,335 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:47,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 05:39:47,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:47,535 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:47,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:47,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1803394558, now seen corresponding path program 32 times [2023-11-29 05:39:47,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:47,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912225626] [2023-11-29 05:39:47,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:47,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1380 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:49,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:49,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912225626] [2023-11-29 05:39:49,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912225626] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:49,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466593093] [2023-11-29 05:39:49,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:39:49,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:49,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:49,158 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:49,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 05:39:49,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:39:49,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:49,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 05:39:49,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1458 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:50,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1458 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:51,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466593093] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:51,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:51,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 88 [2023-11-29 05:39:51,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543590912] [2023-11-29 05:39:51,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:51,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-11-29 05:39:51,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:51,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-11-29 05:39:51,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1743, Invalid=5913, Unknown=0, NotChecked=0, Total=7656 [2023-11-29 05:39:51,752 INFO L87 Difference]: Start difference. First operand 174 states and 177 transitions. Second operand has 88 states, 88 states have (on average 3.284090909090909) internal successors, (289), 88 states have internal predecessors, (289), 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) [2023-11-29 05:39:52,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:52,741 INFO L93 Difference]: Finished difference Result 403 states and 463 transitions. [2023-11-29 05:39:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 05:39:52,741 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.284090909090909) internal successors, (289), 88 states have internal predecessors, (289), 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 173 [2023-11-29 05:39:52,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:52,743 INFO L225 Difference]: With dead ends: 403 [2023-11-29 05:39:52,743 INFO L226 Difference]: Without dead ends: 288 [2023-11-29 05:39:52,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 262 SyntacticMatches, 54 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4960 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3369, Invalid=9971, Unknown=0, NotChecked=0, Total=13340 [2023-11-29 05:39:52,744 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 380 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:52,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 572 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:39:52,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-11-29 05:39:52,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 176. [2023-11-29 05:39:52,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.022857142857143) internal successors, (179), 175 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:52,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 179 transitions. [2023-11-29 05:39:52,754 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 179 transitions. Word has length 173 [2023-11-29 05:39:52,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:52,755 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 179 transitions. [2023-11-29 05:39:52,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.284090909090909) internal successors, (289), 88 states have internal predecessors, (289), 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) [2023-11-29 05:39:52,755 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 179 transitions. [2023-11-29 05:39:52,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-29 05:39:52,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:52,756 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:52,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 05:39:52,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:52,957 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:52,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:52,957 INFO L85 PathProgramCache]: Analyzing trace with hash 985803111, now seen corresponding path program 33 times [2023-11-29 05:39:52,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:52,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515507334] [2023-11-29 05:39:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:52,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 756 proven. 1514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:53,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:53,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515507334] [2023-11-29 05:39:53,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515507334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:53,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559730001] [2023-11-29 05:39:53,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:39:53,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:53,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:53,875 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:53,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 05:39:54,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2023-11-29 05:39:54,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:54,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-29 05:39:54,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 812 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:54,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 812 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:54,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559730001] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:54,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:54,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 34 [2023-11-29 05:39:54,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124658545] [2023-11-29 05:39:54,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:54,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 05:39:54,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:54,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 05:39:54,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=685, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 05:39:54,859 INFO L87 Difference]: Start difference. First operand 176 states and 179 transitions. Second operand has 35 states, 35 states have (on average 5.6571428571428575) internal successors, (198), 34 states have internal predecessors, (198), 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) [2023-11-29 05:39:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:39:55,363 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2023-11-29 05:39:55,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-29 05:39:55,363 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.6571428571428575) internal successors, (198), 34 states have internal predecessors, (198), 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 175 [2023-11-29 05:39:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:39:55,364 INFO L225 Difference]: With dead ends: 193 [2023-11-29 05:39:55,364 INFO L226 Difference]: Without dead ends: 191 [2023-11-29 05:39:55,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 318 SyntacticMatches, 55 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1524, Invalid=2636, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 05:39:55,366 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 38 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:39:55,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 321 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:39:55,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-29 05:39:55,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2023-11-29 05:39:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.0218579234972678) internal successors, (187), 183 states have internal predecessors, (187), 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) [2023-11-29 05:39:55,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 187 transitions. [2023-11-29 05:39:55,378 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 187 transitions. Word has length 175 [2023-11-29 05:39:55,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:39:55,379 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 187 transitions. [2023-11-29 05:39:55,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.6571428571428575) internal successors, (198), 34 states have internal predecessors, (198), 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) [2023-11-29 05:39:55,379 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 187 transitions. [2023-11-29 05:39:55,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-11-29 05:39:55,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:39:55,380 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:55,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 05:39:55,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 05:39:55,580 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:39:55,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:55,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1612831667, now seen corresponding path program 34 times [2023-11-29 05:39:55,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:55,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279712721] [2023-11-29 05:39:55,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:55,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1598 proven. 896 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:57,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:57,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279712721] [2023-11-29 05:39:57,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279712721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:57,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450140154] [2023-11-29 05:39:57,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:39:57,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:57,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:57,283 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:57,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 05:39:57,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:39:57,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:57,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-29 05:39:57,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1682 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:58,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1682 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:59,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450140154] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:59,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:59,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 95 [2023-11-29 05:39:59,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194359971] [2023-11-29 05:39:59,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:59,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-11-29 05:39:59,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:59,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-11-29 05:39:59,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2050, Invalid=6880, Unknown=0, NotChecked=0, Total=8930 [2023-11-29 05:39:59,946 INFO L87 Difference]: Start difference. First operand 184 states and 187 transitions. Second operand has 95 states, 95 states have (on average 3.3263157894736843) internal successors, (316), 95 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:01,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:40:01,743 INFO L93 Difference]: Finished difference Result 546 states and 611 transitions. [2023-11-29 05:40:01,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-11-29 05:40:01,743 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.3263157894736843) internal successors, (316), 95 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2023-11-29 05:40:01,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:40:01,745 INFO L225 Difference]: With dead ends: 546 [2023-11-29 05:40:01,745 INFO L226 Difference]: Without dead ends: 308 [2023-11-29 05:40:01,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 277 SyntacticMatches, 55 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7839 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5739, Invalid=17823, Unknown=0, NotChecked=0, Total=23562 [2023-11-29 05:40:01,747 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 543 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:40:01,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 963 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:40:01,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-11-29 05:40:01,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 188. [2023-11-29 05:40:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0213903743315509) internal successors, (191), 187 states have internal predecessors, (191), 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) [2023-11-29 05:40:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 191 transitions. [2023-11-29 05:40:01,758 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 191 transitions. Word has length 183 [2023-11-29 05:40:01,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:40:01,759 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 191 transitions. [2023-11-29 05:40:01,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.3263157894736843) internal successors, (316), 95 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:01,759 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 191 transitions. [2023-11-29 05:40:01,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-29 05:40:01,760 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:40:01,760 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:01,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 05:40:01,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 05:40:01,961 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:40:01,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:01,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2081065303, now seen corresponding path program 35 times [2023-11-29 05:40:01,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:01,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115453962] [2023-11-29 05:40:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:01,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2612 backedges. 870 proven. 1742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:03,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:03,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115453962] [2023-11-29 05:40:03,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115453962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:03,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513737061] [2023-11-29 05:40:03,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:40:03,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:03,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:03,120 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:03,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 05:40:03,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2023-11-29 05:40:03,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:40:03,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 05:40:03,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2612 backedges. 930 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:03,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2612 backedges. 930 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:04,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513737061] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:04,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:04,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 36 [2023-11-29 05:40:04,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444204449] [2023-11-29 05:40:04,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:04,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 05:40:04,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:04,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 05:40:04,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=762, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 05:40:04,233 INFO L87 Difference]: Start difference. First operand 188 states and 191 transitions. Second operand has 37 states, 37 states have (on average 5.675675675675675) internal successors, (210), 36 states have internal predecessors, (210), 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) [2023-11-29 05:40:04,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:40:04,759 INFO L93 Difference]: Finished difference Result 205 states and 209 transitions. [2023-11-29 05:40:04,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-29 05:40:04,760 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.675675675675675) internal successors, (210), 36 states have internal predecessors, (210), 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 187 [2023-11-29 05:40:04,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:40:04,761 INFO L225 Difference]: With dead ends: 205 [2023-11-29 05:40:04,761 INFO L226 Difference]: Without dead ends: 203 [2023-11-29 05:40:04,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 340 SyntacticMatches, 59 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1721, Invalid=2971, Unknown=0, NotChecked=0, Total=4692 [2023-11-29 05:40:04,762 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 44 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:40:04,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 306 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:40:04,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-11-29 05:40:04,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 196. [2023-11-29 05:40:04,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0205128205128204) internal successors, (199), 195 states have internal predecessors, (199), 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) [2023-11-29 05:40:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 199 transitions. [2023-11-29 05:40:04,777 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 199 transitions. Word has length 187 [2023-11-29 05:40:04,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:40:04,777 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 199 transitions. [2023-11-29 05:40:04,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.675675675675675) internal successors, (210), 36 states have internal predecessors, (210), 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) [2023-11-29 05:40:04,777 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 199 transitions. [2023-11-29 05:40:04,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-29 05:40:04,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:40:04,778 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:04,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 05:40:04,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 05:40:04,979 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:40:04,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:04,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2122290237, now seen corresponding path program 36 times [2023-11-29 05:40:04,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:04,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241585395] [2023-11-29 05:40:04,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:04,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 1832 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:07,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:07,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241585395] [2023-11-29 05:40:07,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241585395] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:07,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205147359] [2023-11-29 05:40:07,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:40:07,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:07,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:07,256 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:07,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 05:40:07,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2023-11-29 05:40:07,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:40:07,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-29 05:40:07,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 1922 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:09,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 1922 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:11,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205147359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:11,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:11,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 101 [2023-11-29 05:40:11,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501451496] [2023-11-29 05:40:11,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:11,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-29 05:40:11,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:11,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-29 05:40:11,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2314, Invalid=7786, Unknown=0, NotChecked=0, Total=10100 [2023-11-29 05:40:11,005 INFO L87 Difference]: Start difference. First operand 196 states and 199 transitions. Second operand has 101 states, 101 states have (on average 3.3267326732673266) internal successors, (336), 101 states have internal predecessors, (336), 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) [2023-11-29 05:40:13,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:40:13,262 INFO L93 Difference]: Finished difference Result 582 states and 651 transitions. [2023-11-29 05:40:13,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-29 05:40:13,263 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.3267326732673266) internal successors, (336), 101 states have internal predecessors, (336), 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 195 [2023-11-29 05:40:13,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:40:13,265 INFO L225 Difference]: With dead ends: 582 [2023-11-29 05:40:13,265 INFO L226 Difference]: Without dead ends: 328 [2023-11-29 05:40:13,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 295 SyntacticMatches, 59 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8908 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=6505, Invalid=20227, Unknown=0, NotChecked=0, Total=26732 [2023-11-29 05:40:13,268 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 559 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:40:13,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 961 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 05:40:13,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-11-29 05:40:13,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 200. [2023-11-29 05:40:13,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.020100502512563) internal successors, (203), 199 states have internal predecessors, (203), 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) [2023-11-29 05:40:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 203 transitions. [2023-11-29 05:40:13,285 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 203 transitions. Word has length 195 [2023-11-29 05:40:13,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:40:13,285 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 203 transitions. [2023-11-29 05:40:13,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.3267326732673266) internal successors, (336), 101 states have internal predecessors, (336), 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) [2023-11-29 05:40:13,285 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 203 transitions. [2023-11-29 05:40:13,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-29 05:40:13,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:40:13,286 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:13,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-29 05:40:13,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 05:40:13,487 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:40:13,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:13,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2069543495, now seen corresponding path program 37 times [2023-11-29 05:40:13,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:13,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858041907] [2023-11-29 05:40:13,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:13,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2978 backedges. 992 proven. 1986 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:15,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:15,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858041907] [2023-11-29 05:40:15,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858041907] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:15,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647737783] [2023-11-29 05:40:15,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:40:15,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:15,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:15,005 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:15,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 05:40:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:15,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-29 05:40:15,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2978 backedges. 1056 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:15,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2978 backedges. 1056 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:16,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647737783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:16,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:16,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 38 [2023-11-29 05:40:16,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922875792] [2023-11-29 05:40:16,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:16,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 05:40:16,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:16,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 05:40:16,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=843, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 05:40:16,243 INFO L87 Difference]: Start difference. First operand 200 states and 203 transitions. Second operand has 39 states, 39 states have (on average 5.6923076923076925) internal successors, (222), 38 states have internal predecessors, (222), 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) [2023-11-29 05:40:16,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:40:16,906 INFO L93 Difference]: Finished difference Result 217 states and 221 transitions. [2023-11-29 05:40:16,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-29 05:40:16,907 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.6923076923076925) internal successors, (222), 38 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2023-11-29 05:40:16,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:40:16,908 INFO L225 Difference]: With dead ends: 217 [2023-11-29 05:40:16,908 INFO L226 Difference]: Without dead ends: 215 [2023-11-29 05:40:16,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 362 SyntacticMatches, 63 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2515 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1930, Invalid=3326, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 05:40:16,909 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 44 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:40:16,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 334 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:40:16,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-11-29 05:40:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 208. [2023-11-29 05:40:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.0193236714975846) internal successors, (211), 207 states have internal predecessors, (211), 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) [2023-11-29 05:40:16,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 211 transitions. [2023-11-29 05:40:16,924 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 211 transitions. Word has length 199 [2023-11-29 05:40:16,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:40:16,924 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 211 transitions. [2023-11-29 05:40:16,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.6923076923076925) internal successors, (222), 38 states have internal predecessors, (222), 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) [2023-11-29 05:40:16,925 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 211 transitions. [2023-11-29 05:40:16,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-29 05:40:16,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:40:16,926 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:16,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-29 05:40:17,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 05:40:17,127 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:40:17,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:17,128 INFO L85 PathProgramCache]: Analyzing trace with hash 46650669, now seen corresponding path program 38 times [2023-11-29 05:40:17,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:17,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555167381] [2023-11-29 05:40:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:17,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 2082 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:19,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:19,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555167381] [2023-11-29 05:40:19,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555167381] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:19,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821257294] [2023-11-29 05:40:19,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:40:19,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:19,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:19,633 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:19,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 05:40:19,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:40:19,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:40:19,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 05:40:19,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 2176 proven. 1056 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:40:21,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 2176 proven. 1056 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:40:23,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821257294] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:23,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:23,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 104 [2023-11-29 05:40:23,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319168415] [2023-11-29 05:40:23,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:23,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2023-11-29 05:40:23,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:23,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2023-11-29 05:40:23,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2418, Invalid=8294, Unknown=0, NotChecked=0, Total=10712 [2023-11-29 05:40:23,549 INFO L87 Difference]: Start difference. First operand 208 states and 211 transitions. Second operand has 104 states, 104 states have (on average 3.3365384615384617) internal successors, (347), 104 states have internal predecessors, (347), 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) [2023-11-29 05:40:25,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:40:25,026 INFO L93 Difference]: Finished difference Result 479 states and 549 transitions. [2023-11-29 05:40:25,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-29 05:40:25,027 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.3365384615384617) internal successors, (347), 104 states have internal predecessors, (347), 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 207 [2023-11-29 05:40:25,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:40:25,029 INFO L225 Difference]: With dead ends: 479 [2023-11-29 05:40:25,029 INFO L226 Difference]: Without dead ends: 342 [2023-11-29 05:40:25,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 315 SyntacticMatches, 64 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6971 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4664, Invalid=13968, Unknown=0, NotChecked=0, Total=18632 [2023-11-29 05:40:25,031 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 404 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:40:25,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 812 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:40:25,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-11-29 05:40:25,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 210. [2023-11-29 05:40:25,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.0191387559808613) internal successors, (213), 209 states have internal predecessors, (213), 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) [2023-11-29 05:40:25,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 213 transitions. [2023-11-29 05:40:25,047 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 213 transitions. Word has length 207 [2023-11-29 05:40:25,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:40:25,047 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 213 transitions. [2023-11-29 05:40:25,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.3365384615384617) internal successors, (347), 104 states have internal predecessors, (347), 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) [2023-11-29 05:40:25,047 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 213 transitions. [2023-11-29 05:40:25,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-11-29 05:40:25,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:40:25,048 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:25,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 05:40:25,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-29 05:40:25,249 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:40:25,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:25,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1775862610, now seen corresponding path program 39 times [2023-11-29 05:40:25,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:25,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772494729] [2023-11-29 05:40:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:25,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 2082 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:27,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:27,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772494729] [2023-11-29 05:40:27,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772494729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:27,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129096687] [2023-11-29 05:40:27,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:40:27,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:27,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:27,774 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:27,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 05:40:28,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2023-11-29 05:40:28,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:40:28,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-29 05:40:28,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 2178 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:30,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 2178 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:31,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129096687] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:31,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:31,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 106 [2023-11-29 05:40:31,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658786925] [2023-11-29 05:40:31,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:31,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2023-11-29 05:40:31,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:31,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2023-11-29 05:40:31,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2523, Invalid=8607, Unknown=0, NotChecked=0, Total=11130 [2023-11-29 05:40:31,673 INFO L87 Difference]: Start difference. First operand 210 states and 213 transitions. Second operand has 106 states, 106 states have (on average 3.292452830188679) internal successors, (349), 106 states have internal predecessors, (349), 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) [2023-11-29 05:40:33,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:40:33,235 INFO L93 Difference]: Finished difference Result 487 states and 559 transitions. [2023-11-29 05:40:33,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-29 05:40:33,236 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.292452830188679) internal successors, (349), 106 states have internal predecessors, (349), 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 209 [2023-11-29 05:40:33,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:40:33,238 INFO L225 Difference]: With dead ends: 487 [2023-11-29 05:40:33,238 INFO L226 Difference]: Without dead ends: 348 [2023-11-29 05:40:33,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 316 SyntacticMatches, 66 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7252 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4905, Invalid=14555, Unknown=0, NotChecked=0, Total=19460 [2023-11-29 05:40:33,240 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 538 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:40:33,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 899 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:40:33,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-29 05:40:33,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 212. [2023-11-29 05:40:33,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.018957345971564) internal successors, (215), 211 states have internal predecessors, (215), 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) [2023-11-29 05:40:33,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 215 transitions. [2023-11-29 05:40:33,256 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 215 transitions. Word has length 209 [2023-11-29 05:40:33,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:40:33,256 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 215 transitions. [2023-11-29 05:40:33,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.292452830188679) internal successors, (349), 106 states have internal predecessors, (349), 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) [2023-11-29 05:40:33,256 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 215 transitions. [2023-11-29 05:40:33,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-11-29 05:40:33,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:40:33,257 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:33,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 05:40:33,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-29 05:40:33,458 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:40:33,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:33,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1396194359, now seen corresponding path program 40 times [2023-11-29 05:40:33,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:33,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049360106] [2023-11-29 05:40:33,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:33,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3368 backedges. 1122 proven. 2246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:35,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:35,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049360106] [2023-11-29 05:40:35,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049360106] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:35,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179940482] [2023-11-29 05:40:35,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:40:35,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:35,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:35,136 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:35,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 05:40:35,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:40:35,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:40:35,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-29 05:40:35,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3368 backedges. 1190 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:35,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3368 backedges. 1190 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:36,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179940482] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:36,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:36,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 40 [2023-11-29 05:40:36,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293283922] [2023-11-29 05:40:36,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:36,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 05:40:36,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:36,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 05:40:36,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=928, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 05:40:36,731 INFO L87 Difference]: Start difference. First operand 212 states and 215 transitions. Second operand has 41 states, 41 states have (on average 5.7073170731707314) internal successors, (234), 40 states have internal predecessors, (234), 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) [2023-11-29 05:40:37,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:40:37,370 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2023-11-29 05:40:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-29 05:40:37,371 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.7073170731707314) internal successors, (234), 40 states have internal predecessors, (234), 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 211 [2023-11-29 05:40:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:40:37,372 INFO L225 Difference]: With dead ends: 229 [2023-11-29 05:40:37,372 INFO L226 Difference]: Without dead ends: 227 [2023-11-29 05:40:37,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 384 SyntacticMatches, 67 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2809 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2151, Invalid=3701, Unknown=0, NotChecked=0, Total=5852 [2023-11-29 05:40:37,374 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 48 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:40:37,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 365 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:40:37,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-29 05:40:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2023-11-29 05:40:37,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0182648401826484) internal successors, (223), 219 states have internal predecessors, (223), 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) [2023-11-29 05:40:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 223 transitions. [2023-11-29 05:40:37,388 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 223 transitions. Word has length 211 [2023-11-29 05:40:37,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:40:37,388 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 223 transitions. [2023-11-29 05:40:37,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.7073170731707314) internal successors, (234), 40 states have internal predecessors, (234), 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) [2023-11-29 05:40:37,388 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 223 transitions. [2023-11-29 05:40:37,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2023-11-29 05:40:37,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:40:37,390 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:37,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-29 05:40:37,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:37,591 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:40:37,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:37,591 INFO L85 PathProgramCache]: Analyzing trace with hash 700213021, now seen corresponding path program 41 times [2023-11-29 05:40:37,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:37,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063219509] [2023-11-29 05:40:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:37,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 2348 proven. 1292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:40,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:40,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063219509] [2023-11-29 05:40:40,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063219509] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:40,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704495741] [2023-11-29 05:40:40,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:40:40,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:40,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:40,293 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:40,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 05:40:40,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2023-11-29 05:40:40,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:40:40,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-29 05:40:40,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 2450 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:42,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 2450 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:43,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704495741] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:43,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:43,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 113 [2023-11-29 05:40:43,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481013373] [2023-11-29 05:40:43,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:43,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-11-29 05:40:43,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:43,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-11-29 05:40:43,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2890, Invalid=9766, Unknown=0, NotChecked=0, Total=12656 [2023-11-29 05:40:43,674 INFO L87 Difference]: Start difference. First operand 220 states and 223 transitions. Second operand has 113 states, 113 states have (on average 3.327433628318584) internal successors, (376), 113 states have internal predecessors, (376), 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) [2023-11-29 05:40:46,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:40:46,191 INFO L93 Difference]: Finished difference Result 654 states and 731 transitions. [2023-11-29 05:40:46,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-11-29 05:40:46,192 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 3.327433628318584) internal successors, (376), 113 states have internal predecessors, (376), 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 219 [2023-11-29 05:40:46,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:40:46,194 INFO L225 Difference]: With dead ends: 654 [2023-11-29 05:40:46,194 INFO L226 Difference]: Without dead ends: 368 [2023-11-29 05:40:46,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 331 SyntacticMatches, 67 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11250 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=8181, Invalid=25491, Unknown=0, NotChecked=0, Total=33672 [2023-11-29 05:40:46,196 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 662 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:40:46,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 1024 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 05:40:46,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-11-29 05:40:46,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 224. [2023-11-29 05:40:46,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0179372197309418) internal successors, (227), 223 states have internal predecessors, (227), 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) [2023-11-29 05:40:46,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 227 transitions. [2023-11-29 05:40:46,218 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 227 transitions. Word has length 219 [2023-11-29 05:40:46,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:40:46,219 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 227 transitions. [2023-11-29 05:40:46,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 3.327433628318584) internal successors, (376), 113 states have internal predecessors, (376), 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) [2023-11-29 05:40:46,219 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 227 transitions. [2023-11-29 05:40:46,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-11-29 05:40:46,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:40:46,220 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:46,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-29 05:40:46,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:46,421 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:40:46,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:46,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1525190439, now seen corresponding path program 42 times [2023-11-29 05:40:46,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:46,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064501895] [2023-11-29 05:40:46,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:46,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 1260 proven. 2522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:47,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:47,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064501895] [2023-11-29 05:40:47,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064501895] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:47,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021781251] [2023-11-29 05:40:47,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:40:47,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:47,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:47,984 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:47,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 05:40:48,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2023-11-29 05:40:48,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:40:48,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-29 05:40:48,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 1332 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:48,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 1332 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:49,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021781251] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:49,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:49,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 42 [2023-11-29 05:40:49,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242814196] [2023-11-29 05:40:49,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:49,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 05:40:49,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:49,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 05:40:49,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=789, Invalid=1017, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 05:40:49,437 INFO L87 Difference]: Start difference. First operand 224 states and 227 transitions. Second operand has 43 states, 43 states have (on average 5.72093023255814) internal successors, (246), 42 states have internal predecessors, (246), 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) [2023-11-29 05:40:50,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:40:50,062 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2023-11-29 05:40:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-29 05:40:50,062 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.72093023255814) internal successors, (246), 42 states have internal predecessors, (246), 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 223 [2023-11-29 05:40:50,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:40:50,063 INFO L225 Difference]: With dead ends: 241 [2023-11-29 05:40:50,064 INFO L226 Difference]: Without dead ends: 239 [2023-11-29 05:40:50,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 406 SyntacticMatches, 71 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3119 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2384, Invalid=4096, Unknown=0, NotChecked=0, Total=6480 [2023-11-29 05:40:50,065 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 85 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:40:50,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 318 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:40:50,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-11-29 05:40:50,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 232. [2023-11-29 05:40:50,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.0173160173160174) internal successors, (235), 231 states have internal predecessors, (235), 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) [2023-11-29 05:40:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 235 transitions. [2023-11-29 05:40:50,087 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 235 transitions. Word has length 223 [2023-11-29 05:40:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:40:50,087 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 235 transitions. [2023-11-29 05:40:50,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.72093023255814) internal successors, (246), 42 states have internal predecessors, (246), 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) [2023-11-29 05:40:50,088 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 235 transitions. [2023-11-29 05:40:50,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-11-29 05:40:50,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:40:50,089 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:50,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-29 05:40:50,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-29 05:40:50,290 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:40:50,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:50,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1830996493, now seen corresponding path program 43 times [2023-11-29 05:40:50,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:50,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47119237] [2023-11-29 05:40:50,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:50,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4070 backedges. 2630 proven. 1440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:52,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:52,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47119237] [2023-11-29 05:40:52,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47119237] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:52,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040333967] [2023-11-29 05:40:52,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:40:52,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:52,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:52,868 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:52,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 05:40:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:53,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-29 05:40:53,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4070 backedges. 2736 proven. 1332 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:40:55,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4070 backedges. 2736 proven. 1332 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:40:56,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040333967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:56,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:56,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 116 [2023-11-29 05:40:56,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462809912] [2023-11-29 05:40:56,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:56,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2023-11-29 05:40:56,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:56,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2023-11-29 05:40:56,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3006, Invalid=10334, Unknown=0, NotChecked=0, Total=13340 [2023-11-29 05:40:56,774 INFO L87 Difference]: Start difference. First operand 232 states and 235 transitions. Second operand has 116 states, 116 states have (on average 3.336206896551724) internal successors, (387), 116 states have internal predecessors, (387), 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) [2023-11-29 05:40:58,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:40:58,236 INFO L93 Difference]: Finished difference Result 535 states and 613 transitions. [2023-11-29 05:40:58,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-29 05:40:58,236 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.336206896551724) internal successors, (387), 116 states have internal predecessors, (387), 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 231 [2023-11-29 05:40:58,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:40:58,238 INFO L225 Difference]: With dead ends: 535 [2023-11-29 05:40:58,238 INFO L226 Difference]: Without dead ends: 382 [2023-11-29 05:40:58,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 351 SyntacticMatches, 72 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8707 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5820, Invalid=17436, Unknown=0, NotChecked=0, Total=23256 [2023-11-29 05:40:58,239 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 559 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:40:58,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 840 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:40:58,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-11-29 05:40:58,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 234. [2023-11-29 05:40:58,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.0171673819742488) internal successors, (237), 233 states have internal predecessors, (237), 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) [2023-11-29 05:40:58,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 237 transitions. [2023-11-29 05:40:58,254 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 237 transitions. Word has length 231 [2023-11-29 05:40:58,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:40:58,254 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 237 transitions. [2023-11-29 05:40:58,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.336206896551724) internal successors, (387), 116 states have internal predecessors, (387), 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) [2023-11-29 05:40:58,254 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 237 transitions. [2023-11-29 05:40:58,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2023-11-29 05:40:58,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:40:58,256 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:58,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-29 05:40:58,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-29 05:40:58,456 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:40:58,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:58,456 INFO L85 PathProgramCache]: Analyzing trace with hash -528115406, now seen corresponding path program 44 times [2023-11-29 05:40:58,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:58,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25084700] [2023-11-29 05:40:58,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:58,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 2630 proven. 1514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:01,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:01,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25084700] [2023-11-29 05:41:01,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25084700] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:01,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100152171] [2023-11-29 05:41:01,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:41:01,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:01,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:01,210 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:01,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-29 05:41:01,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:41:01,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:41:01,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-29 05:41:01,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 2738 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:03,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:41:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 2738 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:05,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100152171] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:41:05,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:41:05,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 118 [2023-11-29 05:41:05,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778412671] [2023-11-29 05:41:05,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:41:05,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2023-11-29 05:41:05,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:05,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2023-11-29 05:41:05,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3123, Invalid=10683, Unknown=0, NotChecked=0, Total=13806 [2023-11-29 05:41:05,153 INFO L87 Difference]: Start difference. First operand 234 states and 237 transitions. Second operand has 118 states, 118 states have (on average 3.2966101694915255) internal successors, (389), 118 states have internal predecessors, (389), 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) [2023-11-29 05:41:06,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:41:06,783 INFO L93 Difference]: Finished difference Result 543 states and 623 transitions. [2023-11-29 05:41:06,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-29 05:41:06,783 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.2966101694915255) internal successors, (389), 118 states have internal predecessors, (389), 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 233 [2023-11-29 05:41:06,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:41:06,785 INFO L225 Difference]: With dead ends: 543 [2023-11-29 05:41:06,785 INFO L226 Difference]: Without dead ends: 388 [2023-11-29 05:41:06,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 352 SyntacticMatches, 74 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9020 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=6089, Invalid=18091, Unknown=0, NotChecked=0, Total=24180 [2023-11-29 05:41:06,786 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 715 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:41:06,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 855 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:41:06,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2023-11-29 05:41:06,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 236. [2023-11-29 05:41:06,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.0170212765957447) internal successors, (239), 235 states have internal predecessors, (239), 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) [2023-11-29 05:41:06,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 239 transitions. [2023-11-29 05:41:06,804 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 239 transitions. Word has length 233 [2023-11-29 05:41:06,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:41:06,804 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 239 transitions. [2023-11-29 05:41:06,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.2966101694915255) internal successors, (389), 118 states have internal predecessors, (389), 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) [2023-11-29 05:41:06,805 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 239 transitions. [2023-11-29 05:41:06,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-11-29 05:41:06,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:41:06,805 INFO L195 NwaCegarLoop]: trace histogram [39, 38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:41:06,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-11-29 05:41:07,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 05:41:07,006 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:41:07,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:07,006 INFO L85 PathProgramCache]: Analyzing trace with hash 108081943, now seen corresponding path program 45 times [2023-11-29 05:41:07,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:07,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054658890] [2023-11-29 05:41:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:07,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4220 backedges. 1406 proven. 2814 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:08,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:08,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054658890] [2023-11-29 05:41:08,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054658890] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:08,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204636296] [2023-11-29 05:41:08,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:41:08,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:08,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:08,682 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:08,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-29 05:41:08,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2023-11-29 05:41:08,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:41:08,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-29 05:41:08,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4220 backedges. 1482 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:09,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:41:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4220 backedges. 1482 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:10,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204636296] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:41:10,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:41:10,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 44 [2023-11-29 05:41:10,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679898146] [2023-11-29 05:41:10,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:41:10,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 05:41:10,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:10,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 05:41:10,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=1110, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 05:41:10,194 INFO L87 Difference]: Start difference. First operand 236 states and 239 transitions. Second operand has 45 states, 45 states have (on average 5.733333333333333) internal successors, (258), 44 states have internal predecessors, (258), 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) [2023-11-29 05:41:10,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:41:10,831 INFO L93 Difference]: Finished difference Result 253 states and 257 transitions. [2023-11-29 05:41:10,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-29 05:41:10,832 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 5.733333333333333) internal successors, (258), 44 states have internal predecessors, (258), 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 235 [2023-11-29 05:41:10,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:41:10,833 INFO L225 Difference]: With dead ends: 253 [2023-11-29 05:41:10,833 INFO L226 Difference]: Without dead ends: 251 [2023-11-29 05:41:10,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 428 SyntacticMatches, 75 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3445 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2629, Invalid=4511, Unknown=0, NotChecked=0, Total=7140 [2023-11-29 05:41:10,834 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 52 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:41:10,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 415 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:41:10,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-11-29 05:41:10,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 244. [2023-11-29 05:41:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.0164609053497942) internal successors, (247), 243 states have internal predecessors, (247), 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) [2023-11-29 05:41:10,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 247 transitions. [2023-11-29 05:41:10,854 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 247 transitions. Word has length 235 [2023-11-29 05:41:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:41:10,854 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 247 transitions. [2023-11-29 05:41:10,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.733333333333333) internal successors, (258), 44 states have internal predecessors, (258), 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) [2023-11-29 05:41:10,855 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 247 transitions. [2023-11-29 05:41:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2023-11-29 05:41:10,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:41:10,856 INFO L195 NwaCegarLoop]: trace histogram [40, 39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:41:10,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-29 05:41:11,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-29 05:41:11,057 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:41:11,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:11,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1551860227, now seen corresponding path program 46 times [2023-11-29 05:41:11,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:11,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969540843] [2023-11-29 05:41:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:11,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 2928 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:13,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:13,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969540843] [2023-11-29 05:41:13,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969540843] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:13,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926970354] [2023-11-29 05:41:13,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:41:13,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:13,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:13,922 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:13,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-29 05:41:14,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:41:14,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:41:14,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-29 05:41:14,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 3042 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:16,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:41:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 3042 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:18,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926970354] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:41:18,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:41:18,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 125 [2023-11-29 05:41:18,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46761407] [2023-11-29 05:41:18,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:41:18,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2023-11-29 05:41:18,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:18,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2023-11-29 05:41:18,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3530, Invalid=11970, Unknown=0, NotChecked=0, Total=15500 [2023-11-29 05:41:18,453 INFO L87 Difference]: Start difference. First operand 244 states and 247 transitions. Second operand has 125 states, 125 states have (on average 3.328) internal successors, (416), 125 states have internal predecessors, (416), 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) [2023-11-29 05:41:21,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:41:21,587 INFO L93 Difference]: Finished difference Result 726 states and 811 transitions. [2023-11-29 05:41:21,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2023-11-29 05:41:21,587 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 3.328) internal successors, (416), 125 states have internal predecessors, (416), 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 243 [2023-11-29 05:41:21,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:41:21,590 INFO L225 Difference]: With dead ends: 726 [2023-11-29 05:41:21,590 INFO L226 Difference]: Without dead ends: 408 [2023-11-29 05:41:21,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 367 SyntacticMatches, 75 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13864 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=10049, Invalid=31363, Unknown=0, NotChecked=0, Total=41412 [2023-11-29 05:41:21,594 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 799 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:41:21,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 1244 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 05:41:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-11-29 05:41:21,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 248. [2023-11-29 05:41:21,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.0161943319838056) internal successors, (251), 247 states have internal predecessors, (251), 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) [2023-11-29 05:41:21,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 251 transitions. [2023-11-29 05:41:21,620 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 251 transitions. Word has length 243 [2023-11-29 05:41:21,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:41:21,620 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 251 transitions. [2023-11-29 05:41:21,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 3.328) internal successors, (416), 125 states have internal predecessors, (416), 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) [2023-11-29 05:41:21,620 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 251 transitions. [2023-11-29 05:41:21,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-11-29 05:41:21,622 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:41:21,622 INFO L195 NwaCegarLoop]: trace histogram [41, 40, 40, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:41:21,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-29 05:41:21,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-29 05:41:21,822 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:41:21,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:21,823 INFO L85 PathProgramCache]: Analyzing trace with hash -963139577, now seen corresponding path program 47 times [2023-11-29 05:41:21,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:21,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152486022] [2023-11-29 05:41:21,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:21,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4682 backedges. 1560 proven. 3122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:23,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:23,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152486022] [2023-11-29 05:41:23,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152486022] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:23,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470359196] [2023-11-29 05:41:23,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:41:23,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:23,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:23,841 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:23,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-29 05:41:24,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2023-11-29 05:41:24,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:41:24,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 86 conjunts are in the unsatisfiable core [2023-11-29 05:41:24,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4682 backedges. 1640 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:24,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:41:25,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4682 backedges. 1640 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:25,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470359196] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:41:25,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:41:25,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 46 [2023-11-29 05:41:25,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863396011] [2023-11-29 05:41:25,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:41:25,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 05:41:25,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:25,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 05:41:25,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=955, Invalid=1207, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 05:41:25,514 INFO L87 Difference]: Start difference. First operand 248 states and 251 transitions. Second operand has 47 states, 47 states have (on average 5.74468085106383) internal successors, (270), 46 states have internal predecessors, (270), 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) [2023-11-29 05:41:26,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:41:26,212 INFO L93 Difference]: Finished difference Result 265 states and 269 transitions. [2023-11-29 05:41:26,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-11-29 05:41:26,212 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 5.74468085106383) internal successors, (270), 46 states have internal predecessors, (270), 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 247 [2023-11-29 05:41:26,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:41:26,214 INFO L225 Difference]: With dead ends: 265 [2023-11-29 05:41:26,214 INFO L226 Difference]: Without dead ends: 263 [2023-11-29 05:41:26,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 450 SyntacticMatches, 79 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3787 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2886, Invalid=4946, Unknown=0, NotChecked=0, Total=7832 [2023-11-29 05:41:26,215 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 52 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:41:26,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 400 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:41:26,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-11-29 05:41:26,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 256. [2023-11-29 05:41:26,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.0156862745098039) internal successors, (259), 255 states have internal predecessors, (259), 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) [2023-11-29 05:41:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 259 transitions. [2023-11-29 05:41:26,231 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 259 transitions. Word has length 247 [2023-11-29 05:41:26,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:41:26,232 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 259 transitions. [2023-11-29 05:41:26,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 5.74468085106383) internal successors, (270), 46 states have internal predecessors, (270), 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) [2023-11-29 05:41:26,232 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 259 transitions. [2023-11-29 05:41:26,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2023-11-29 05:41:26,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:41:26,233 INFO L195 NwaCegarLoop]: trace histogram [42, 41, 41, 41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:41:26,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-29 05:41:26,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-29 05:41:26,433 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:41:26,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:26,434 INFO L85 PathProgramCache]: Analyzing trace with hash -535100691, now seen corresponding path program 48 times [2023-11-29 05:41:26,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:26,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132243573] [2023-11-29 05:41:26,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:26,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5002 backedges. 3242 proven. 1760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:29,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:29,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132243573] [2023-11-29 05:41:29,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132243573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:29,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303986968] [2023-11-29 05:41:29,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:41:29,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:29,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:29,593 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:29,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-29 05:41:29,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2023-11-29 05:41:29,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:41:29,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 85 conjunts are in the unsatisfiable core [2023-11-29 05:41:29,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5002 backedges. 3362 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:32,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:41:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5002 backedges. 3362 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:34,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303986968] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:41:34,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:41:34,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 131 [2023-11-29 05:41:34,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120645710] [2023-11-29 05:41:34,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:41:34,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2023-11-29 05:41:34,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:34,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2023-11-29 05:41:34,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3874, Invalid=13156, Unknown=0, NotChecked=0, Total=17030 [2023-11-29 05:41:34,465 INFO L87 Difference]: Start difference. First operand 256 states and 259 transitions. Second operand has 131 states, 131 states have (on average 3.3282442748091605) internal successors, (436), 131 states have internal predecessors, (436), 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) [2023-11-29 05:41:37,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:41:37,943 INFO L93 Difference]: Finished difference Result 762 states and 851 transitions. [2023-11-29 05:41:37,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2023-11-29 05:41:37,943 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.3282442748091605) internal successors, (436), 131 states have internal predecessors, (436), 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 255 [2023-11-29 05:41:37,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:41:37,945 INFO L225 Difference]: With dead ends: 762 [2023-11-29 05:41:37,945 INFO L226 Difference]: Without dead ends: 428 [2023-11-29 05:41:37,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 385 SyntacticMatches, 79 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15273 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=11055, Invalid=34527, Unknown=0, NotChecked=0, Total=45582 [2023-11-29 05:41:37,948 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1040 mSDsluCounter, 1509 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1040 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:41:37,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1040 Valid, 1594 Invalid, 2030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 05:41:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2023-11-29 05:41:37,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 260. [2023-11-29 05:41:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.0154440154440154) internal successors, (263), 259 states have internal predecessors, (263), 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) [2023-11-29 05:41:37,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 263 transitions. [2023-11-29 05:41:37,967 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 263 transitions. Word has length 255 [2023-11-29 05:41:37,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:41:37,967 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 263 transitions. [2023-11-29 05:41:37,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.3282442748091605) internal successors, (436), 131 states have internal predecessors, (436), 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) [2023-11-29 05:41:37,968 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 263 transitions. [2023-11-29 05:41:37,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-11-29 05:41:37,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:41:37,969 INFO L195 NwaCegarLoop]: trace histogram [43, 42, 42, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:41:37,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-11-29 05:41:38,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:38,170 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:41:38,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:38,170 INFO L85 PathProgramCache]: Analyzing trace with hash -387879433, now seen corresponding path program 49 times [2023-11-29 05:41:38,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:38,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707217713] [2023-11-29 05:41:38,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:38,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:40,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5168 backedges. 1722 proven. 3446 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:40,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:40,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707217713] [2023-11-29 05:41:40,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707217713] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:40,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267470906] [2023-11-29 05:41:40,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:41:40,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:40,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:40,322 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:40,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-29 05:41:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:40,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 90 conjunts are in the unsatisfiable core [2023-11-29 05:41:40,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5168 backedges. 1806 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:40,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:41:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5168 backedges. 1806 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:42,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267470906] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:41:42,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:41:42,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 48 [2023-11-29 05:41:42,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403353721] [2023-11-29 05:41:42,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:41:42,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 05:41:42,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:42,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 05:41:42,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1044, Invalid=1308, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 05:41:42,046 INFO L87 Difference]: Start difference. First operand 260 states and 263 transitions. Second operand has 49 states, 49 states have (on average 5.755102040816326) internal successors, (282), 48 states have internal predecessors, (282), 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) [2023-11-29 05:41:42,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:41:42,821 INFO L93 Difference]: Finished difference Result 277 states and 281 transitions. [2023-11-29 05:41:42,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-11-29 05:41:42,821 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 5.755102040816326) internal successors, (282), 48 states have internal predecessors, (282), 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 259 [2023-11-29 05:41:42,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:41:42,822 INFO L225 Difference]: With dead ends: 277 [2023-11-29 05:41:42,823 INFO L226 Difference]: Without dead ends: 275 [2023-11-29 05:41:42,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 472 SyntacticMatches, 83 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4145 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3155, Invalid=5401, Unknown=0, NotChecked=0, Total=8556 [2023-11-29 05:41:42,824 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 54 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:41:42,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 434 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:41:42,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-11-29 05:41:42,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 268. [2023-11-29 05:41:42,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.0149812734082397) internal successors, (271), 267 states have internal predecessors, (271), 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) [2023-11-29 05:41:42,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 271 transitions. [2023-11-29 05:41:42,841 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 271 transitions. Word has length 259 [2023-11-29 05:41:42,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:41:42,841 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 271 transitions. [2023-11-29 05:41:42,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 5.755102040816326) internal successors, (282), 48 states have internal predecessors, (282), 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) [2023-11-29 05:41:42,841 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 271 transitions. [2023-11-29 05:41:42,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-29 05:41:42,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:41:42,842 INFO L195 NwaCegarLoop]: trace histogram [44, 43, 43, 43, 43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:41:42,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-11-29 05:41:43,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:43,043 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:41:43,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:43,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1391974621, now seen corresponding path program 50 times [2023-11-29 05:41:43,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:43,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147440487] [2023-11-29 05:41:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:43,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5504 backedges. 3572 proven. 1932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:46,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:46,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147440487] [2023-11-29 05:41:46,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147440487] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:46,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035262456] [2023-11-29 05:41:46,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:41:46,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:46,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:46,586 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:46,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-29 05:41:46,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:41:46,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:41:46,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 88 conjunts are in the unsatisfiable core [2023-11-29 05:41:46,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5504 backedges. 3696 proven. 1806 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:41:49,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:41:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5504 backedges. 3696 proven. 1806 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:41:51,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035262456] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:41:51,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:41:51,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 134 [2023-11-29 05:41:51,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476980290] [2023-11-29 05:41:51,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:41:51,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2023-11-29 05:41:51,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:51,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2023-11-29 05:41:51,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4008, Invalid=13814, Unknown=0, NotChecked=0, Total=17822 [2023-11-29 05:41:51,801 INFO L87 Difference]: Start difference. First operand 268 states and 271 transitions. Second operand has 134 states, 134 states have (on average 3.3358208955223883) internal successors, (447), 134 states have internal predecessors, (447), 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) [2023-11-29 05:41:53,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:41:53,919 INFO L93 Difference]: Finished difference Result 619 states and 709 transitions. [2023-11-29 05:41:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-11-29 05:41:53,919 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 3.3358208955223883) internal successors, (447), 134 states have internal predecessors, (447), 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 267 [2023-11-29 05:41:53,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:41:53,922 INFO L225 Difference]: With dead ends: 619 [2023-11-29 05:41:53,922 INFO L226 Difference]: Without dead ends: 442 [2023-11-29 05:41:53,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 405 SyntacticMatches, 84 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11671 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=7794, Invalid=23358, Unknown=0, NotChecked=0, Total=31152 [2023-11-29 05:41:53,924 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 770 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:41:53,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 1137 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 05:41:53,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2023-11-29 05:41:53,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 270. [2023-11-29 05:41:53,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.0148698884758365) internal successors, (273), 269 states have internal predecessors, (273), 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) [2023-11-29 05:41:53,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 273 transitions. [2023-11-29 05:41:53,953 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 273 transitions. Word has length 267 [2023-11-29 05:41:53,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:41:53,953 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 273 transitions. [2023-11-29 05:41:53,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 3.3358208955223883) internal successors, (447), 134 states have internal predecessors, (447), 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) [2023-11-29 05:41:53,953 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 273 transitions. [2023-11-29 05:41:53,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-11-29 05:41:53,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:41:53,955 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:41:53,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-11-29 05:41:54,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:54,155 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:41:54,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:54,156 INFO L85 PathProgramCache]: Analyzing trace with hash -928990846, now seen corresponding path program 51 times [2023-11-29 05:41:54,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:54,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241162072] [2023-11-29 05:41:54,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:54,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 3572 proven. 2018 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:57,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:57,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241162072] [2023-11-29 05:41:57,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241162072] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:57,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893998386] [2023-11-29 05:41:57,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:41:57,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:57,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:57,748 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:57,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-29 05:41:58,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2023-11-29 05:41:58,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:41:58,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 90 conjunts are in the unsatisfiable core [2023-11-29 05:41:58,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:42:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 3698 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:00,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:42:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 3698 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:03,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893998386] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:42:03,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:42:03,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 136 [2023-11-29 05:42:03,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622363267] [2023-11-29 05:42:03,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:42:03,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2023-11-29 05:42:03,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:42:03,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2023-11-29 05:42:03,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4143, Invalid=14217, Unknown=0, NotChecked=0, Total=18360 [2023-11-29 05:42:03,095 INFO L87 Difference]: Start difference. First operand 270 states and 273 transitions. Second operand has 136 states, 136 states have (on average 3.301470588235294) internal successors, (449), 136 states have internal predecessors, (449), 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) [2023-11-29 05:42:05,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:42:05,241 INFO L93 Difference]: Finished difference Result 627 states and 719 transitions. [2023-11-29 05:42:05,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-11-29 05:42:05,241 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 3.301470588235294) internal successors, (449), 136 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2023-11-29 05:42:05,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:42:05,243 INFO L225 Difference]: With dead ends: 627 [2023-11-29 05:42:05,243 INFO L226 Difference]: Without dead ends: 448 [2023-11-29 05:42:05,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 406 SyntacticMatches, 86 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12032 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=8105, Invalid=24115, Unknown=0, NotChecked=0, Total=32220 [2023-11-29 05:42:05,245 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 745 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:42:05,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 1134 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 05:42:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2023-11-29 05:42:05,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 272. [2023-11-29 05:42:05,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.014760147601476) internal successors, (275), 271 states have internal predecessors, (275), 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) [2023-11-29 05:42:05,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 275 transitions. [2023-11-29 05:42:05,263 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 275 transitions. Word has length 269 [2023-11-29 05:42:05,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:42:05,264 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 275 transitions. [2023-11-29 05:42:05,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 3.301470588235294) internal successors, (449), 136 states have internal predecessors, (449), 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) [2023-11-29 05:42:05,264 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 275 transitions. [2023-11-29 05:42:05,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-29 05:42:05,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:42:05,265 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:42:05,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-29 05:42:05,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:05,466 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:42:05,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:42:05,466 INFO L85 PathProgramCache]: Analyzing trace with hash 2006189287, now seen corresponding path program 52 times [2023-11-29 05:42:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:42:05,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90917696] [2023-11-29 05:42:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:42:05,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:42:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:42:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5678 backedges. 1892 proven. 3786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:07,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:42:07,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90917696] [2023-11-29 05:42:07,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90917696] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:07,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998255721] [2023-11-29 05:42:07,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:42:07,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:07,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:42:07,911 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:42:07,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-29 05:42:08,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:42:08,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:42:08,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-29 05:42:08,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:42:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5678 backedges. 1980 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:08,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:42:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5678 backedges. 1980 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:09,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998255721] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:42:09,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:42:09,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 50 [2023-11-29 05:42:09,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080331176] [2023-11-29 05:42:09,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:42:09,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 05:42:09,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:42:09,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 05:42:09,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1137, Invalid=1413, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 05:42:09,796 INFO L87 Difference]: Start difference. First operand 272 states and 275 transitions. Second operand has 51 states, 51 states have (on average 5.764705882352941) internal successors, (294), 50 states have internal predecessors, (294), 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) [2023-11-29 05:42:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:42:10,537 INFO L93 Difference]: Finished difference Result 289 states and 293 transitions. [2023-11-29 05:42:10,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-29 05:42:10,537 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 5.764705882352941) internal successors, (294), 50 states have internal predecessors, (294), 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 271 [2023-11-29 05:42:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:42:10,538 INFO L225 Difference]: With dead ends: 289 [2023-11-29 05:42:10,538 INFO L226 Difference]: Without dead ends: 287 [2023-11-29 05:42:10,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 494 SyntacticMatches, 87 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4519 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3436, Invalid=5876, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 05:42:10,539 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 58 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:42:10,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 427 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:42:10,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-11-29 05:42:10,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 280. [2023-11-29 05:42:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.014336917562724) internal successors, (283), 279 states have internal predecessors, (283), 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) [2023-11-29 05:42:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 283 transitions. [2023-11-29 05:42:10,564 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 283 transitions. Word has length 271 [2023-11-29 05:42:10,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:42:10,564 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 283 transitions. [2023-11-29 05:42:10,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.764705882352941) internal successors, (294), 50 states have internal predecessors, (294), 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) [2023-11-29 05:42:10,564 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 283 transitions. [2023-11-29 05:42:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2023-11-29 05:42:10,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:42:10,566 INFO L195 NwaCegarLoop]: trace histogram [46, 45, 45, 45, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:42:10,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-11-29 05:42:10,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-11-29 05:42:10,766 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:42:10,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:42:10,767 INFO L85 PathProgramCache]: Analyzing trace with hash 685539277, now seen corresponding path program 53 times [2023-11-29 05:42:10,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:42:10,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802773141] [2023-11-29 05:42:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:42:10,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:42:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:42:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6030 backedges. 3918 proven. 2112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:14,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:42:14,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802773141] [2023-11-29 05:42:14,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802773141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:14,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795671373] [2023-11-29 05:42:14,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:42:14,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:14,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:42:14,631 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:42:14,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-29 05:42:14,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2023-11-29 05:42:14,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:42:14,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 93 conjunts are in the unsatisfiable core [2023-11-29 05:42:14,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:42:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6030 backedges. 4050 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:18,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:42:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6030 backedges. 4050 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:20,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795671373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:42:20,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:42:20,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 143 [2023-11-29 05:42:20,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503559644] [2023-11-29 05:42:20,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:42:20,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2023-11-29 05:42:20,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:42:20,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2023-11-29 05:42:20,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4610, Invalid=15696, Unknown=0, NotChecked=0, Total=20306 [2023-11-29 05:42:20,314 INFO L87 Difference]: Start difference. First operand 280 states and 283 transitions. Second operand has 143 states, 143 states have (on average 3.3286713286713288) internal successors, (476), 143 states have internal predecessors, (476), 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) [2023-11-29 05:42:24,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:42:24,180 INFO L93 Difference]: Finished difference Result 834 states and 931 transitions. [2023-11-29 05:42:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2023-11-29 05:42:24,180 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 3.3286713286713288) internal successors, (476), 143 states have internal predecessors, (476), 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 279 [2023-11-29 05:42:24,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:42:24,182 INFO L225 Difference]: With dead ends: 834 [2023-11-29 05:42:24,182 INFO L226 Difference]: Without dead ends: 468 [2023-11-29 05:42:24,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 421 SyntacticMatches, 87 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18295 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=13211, Invalid=41311, Unknown=0, NotChecked=0, Total=54522 [2023-11-29 05:42:24,185 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 883 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:42:24,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [883 Valid, 1217 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 05:42:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2023-11-29 05:42:24,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 284. [2023-11-29 05:42:24,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.0141342756183747) internal successors, (287), 283 states have internal predecessors, (287), 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) [2023-11-29 05:42:24,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 287 transitions. [2023-11-29 05:42:24,207 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 287 transitions. Word has length 279 [2023-11-29 05:42:24,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:42:24,208 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 287 transitions. [2023-11-29 05:42:24,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 3.3286713286713288) internal successors, (476), 143 states have internal predecessors, (476), 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) [2023-11-29 05:42:24,208 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 287 transitions. [2023-11-29 05:42:24,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2023-11-29 05:42:24,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:42:24,209 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:42:24,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-11-29 05:42:24,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:24,410 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:42:24,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:42:24,411 INFO L85 PathProgramCache]: Analyzing trace with hash 431287511, now seen corresponding path program 54 times [2023-11-29 05:42:24,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:42:24,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406191810] [2023-11-29 05:42:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:42:24,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:42:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:42:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 2070 proven. 4142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:27,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:42:27,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406191810] [2023-11-29 05:42:27,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406191810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:27,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055639397] [2023-11-29 05:42:27,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:42:27,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:27,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:42:27,305 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:42:27,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-29 05:42:27,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2023-11-29 05:42:27,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:42:27,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 98 conjunts are in the unsatisfiable core [2023-11-29 05:42:27,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:42:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 2162 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:27,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:42:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 2162 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:29,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055639397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:42:29,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:42:29,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 52 [2023-11-29 05:42:29,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374097428] [2023-11-29 05:42:29,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:42:29,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 05:42:29,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:42:29,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 05:42:29,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1234, Invalid=1522, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 05:42:29,508 INFO L87 Difference]: Start difference. First operand 284 states and 287 transitions. Second operand has 53 states, 53 states have (on average 5.773584905660377) internal successors, (306), 52 states have internal predecessors, (306), 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) [2023-11-29 05:42:30,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:42:30,383 INFO L93 Difference]: Finished difference Result 301 states and 305 transitions. [2023-11-29 05:42:30,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-29 05:42:30,384 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 5.773584905660377) internal successors, (306), 52 states have internal predecessors, (306), 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 283 [2023-11-29 05:42:30,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:42:30,385 INFO L225 Difference]: With dead ends: 301 [2023-11-29 05:42:30,385 INFO L226 Difference]: Without dead ends: 299 [2023-11-29 05:42:30,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 516 SyntacticMatches, 91 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4909 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3729, Invalid=6371, Unknown=0, NotChecked=0, Total=10100 [2023-11-29 05:42:30,386 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 109 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:42:30,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 463 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:42:30,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-11-29 05:42:30,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 292. [2023-11-29 05:42:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.013745704467354) internal successors, (295), 291 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:30,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 295 transitions. [2023-11-29 05:42:30,409 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 295 transitions. Word has length 283 [2023-11-29 05:42:30,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:42:30,409 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 295 transitions. [2023-11-29 05:42:30,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 5.773584905660377) internal successors, (306), 52 states have internal predecessors, (306), 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) [2023-11-29 05:42:30,409 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 295 transitions. [2023-11-29 05:42:30,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2023-11-29 05:42:30,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:42:30,411 INFO L195 NwaCegarLoop]: trace histogram [48, 47, 47, 47, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:42:30,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-11-29 05:42:30,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:30,611 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:42:30,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:42:30,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1800304573, now seen corresponding path program 55 times [2023-11-29 05:42:30,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:42:30,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932676948] [2023-11-29 05:42:30,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:42:30,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:42:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:42:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 4280 proven. 2300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:35,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:42:35,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932676948] [2023-11-29 05:42:35,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932676948] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:35,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271814134] [2023-11-29 05:42:35,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:42:35,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:35,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:42:35,218 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:42:35,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-29 05:42:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:42:35,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-29 05:42:35,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:42:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 4416 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:42:38,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:42:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 4416 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:42:41,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271814134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:42:41,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:42:41,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 146 [2023-11-29 05:42:41,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119611437] [2023-11-29 05:42:41,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:42:41,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2023-11-29 05:42:41,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:42:41,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2023-11-29 05:42:41,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4756, Invalid=16414, Unknown=0, NotChecked=0, Total=21170 [2023-11-29 05:42:41,460 INFO L87 Difference]: Start difference. First operand 292 states and 295 transitions. Second operand has 146 states, 146 states have (on average 3.335616438356164) internal successors, (487), 146 states have internal predecessors, (487), 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) [2023-11-29 05:42:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:42:44,197 INFO L93 Difference]: Finished difference Result 675 states and 773 transitions. [2023-11-29 05:42:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-29 05:42:44,197 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 3.335616438356164) internal successors, (487), 146 states have internal predecessors, (487), 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 291 [2023-11-29 05:42:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:42:44,199 INFO L225 Difference]: With dead ends: 675 [2023-11-29 05:42:44,199 INFO L226 Difference]: Without dead ends: 482 [2023-11-29 05:42:44,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 441 SyntacticMatches, 92 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13887 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=9270, Invalid=27786, Unknown=0, NotChecked=0, Total=37056 [2023-11-29 05:42:44,202 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 837 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:42:44,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 1061 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 05:42:44,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2023-11-29 05:42:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 294. [2023-11-29 05:42:44,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.0136518771331058) internal successors, (297), 293 states have internal predecessors, (297), 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) [2023-11-29 05:42:44,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 297 transitions. [2023-11-29 05:42:44,226 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 297 transitions. Word has length 291 [2023-11-29 05:42:44,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:42:44,226 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 297 transitions. [2023-11-29 05:42:44,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 3.335616438356164) internal successors, (487), 146 states have internal predecessors, (487), 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) [2023-11-29 05:42:44,226 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 297 transitions. [2023-11-29 05:42:44,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-11-29 05:42:44,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:42:44,228 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:42:44,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-11-29 05:42:44,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-11-29 05:42:44,429 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:42:44,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:42:44,429 INFO L85 PathProgramCache]: Analyzing trace with hash -545719966, now seen corresponding path program 56 times [2023-11-29 05:42:44,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:42:44,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335331590] [2023-11-29 05:42:44,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:42:44,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:42:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:42:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 4280 proven. 2394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:48,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:42:48,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335331590] [2023-11-29 05:42:48,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335331590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:48,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202172088] [2023-11-29 05:42:48,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:42:48,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:48,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:42:48,741 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:42:48,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-29 05:42:48,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:42:48,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:42:48,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 98 conjunts are in the unsatisfiable core [2023-11-29 05:42:48,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:42:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 4418 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:52,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:42:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 4418 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:55,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202172088] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:42:55,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:42:55,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 148 [2023-11-29 05:42:55,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042626543] [2023-11-29 05:42:55,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:42:55,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2023-11-29 05:42:55,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:42:55,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2023-11-29 05:42:55,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4903, Invalid=16853, Unknown=0, NotChecked=0, Total=21756 [2023-11-29 05:42:55,348 INFO L87 Difference]: Start difference. First operand 294 states and 297 transitions. Second operand has 148 states, 148 states have (on average 3.304054054054054) internal successors, (489), 148 states have internal predecessors, (489), 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) [2023-11-29 05:42:58,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:42:58,540 INFO L93 Difference]: Finished difference Result 683 states and 783 transitions. [2023-11-29 05:42:58,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-11-29 05:42:58,540 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 3.304054054054054) internal successors, (489), 148 states have internal predecessors, (489), 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 293 [2023-11-29 05:42:58,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:42:58,542 INFO L225 Difference]: With dead ends: 683 [2023-11-29 05:42:58,542 INFO L226 Difference]: Without dead ends: 488 [2023-11-29 05:42:58,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 442 SyntacticMatches, 94 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14280 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=9609, Invalid=28611, Unknown=0, NotChecked=0, Total=38220 [2023-11-29 05:42:58,545 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 632 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:42:58,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 1375 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 05:42:58,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2023-11-29 05:42:58,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 296. [2023-11-29 05:42:58,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.0135593220338983) internal successors, (299), 295 states have internal predecessors, (299), 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) [2023-11-29 05:42:58,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 299 transitions. [2023-11-29 05:42:58,571 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 299 transitions. Word has length 293 [2023-11-29 05:42:58,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:42:58,571 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 299 transitions. [2023-11-29 05:42:58,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 3.304054054054054) internal successors, (489), 148 states have internal predecessors, (489), 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) [2023-11-29 05:42:58,572 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 299 transitions. [2023-11-29 05:42:58,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 05:42:58,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:42:58,573 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:42:58,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-11-29 05:42:58,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-29 05:42:58,773 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:42:58,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:42:58,774 INFO L85 PathProgramCache]: Analyzing trace with hash -217471545, now seen corresponding path program 57 times [2023-11-29 05:42:58,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:42:58,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916139533] [2023-11-29 05:42:58,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:42:58,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:42:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6770 backedges. 2256 proven. 4514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:01,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:01,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916139533] [2023-11-29 05:43:01,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916139533] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:01,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163501595] [2023-11-29 05:43:01,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:43:01,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:01,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:01,580 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:01,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-29 05:43:01,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 49 check-sat command(s) [2023-11-29 05:43:01,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:01,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 102 conjunts are in the unsatisfiable core [2023-11-29 05:43:01,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6770 backedges. 2352 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:02,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6770 backedges. 2352 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:04,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163501595] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:43:04,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:43:04,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 54 [2023-11-29 05:43:04,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487980829] [2023-11-29 05:43:04,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:43:04,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-29 05:43:04,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:04,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-29 05:43:04,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=1635, Unknown=0, NotChecked=0, Total=2970 [2023-11-29 05:43:04,094 INFO L87 Difference]: Start difference. First operand 296 states and 299 transitions. Second operand has 55 states, 55 states have (on average 5.781818181818182) internal successors, (318), 54 states have internal predecessors, (318), 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) [2023-11-29 05:43:05,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:05,171 INFO L93 Difference]: Finished difference Result 313 states and 317 transitions. [2023-11-29 05:43:05,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-11-29 05:43:05,172 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 5.781818181818182) internal successors, (318), 54 states have internal predecessors, (318), 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 295 [2023-11-29 05:43:05,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:05,173 INFO L225 Difference]: With dead ends: 313 [2023-11-29 05:43:05,173 INFO L226 Difference]: Without dead ends: 311 [2023-11-29 05:43:05,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 538 SyntacticMatches, 95 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5315 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4034, Invalid=6886, Unknown=0, NotChecked=0, Total=10920 [2023-11-29 05:43:05,174 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 60 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:05,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 474 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:43:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-11-29 05:43:05,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 304. [2023-11-29 05:43:05,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.0132013201320131) internal successors, (307), 303 states have internal predecessors, (307), 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) [2023-11-29 05:43:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 307 transitions. [2023-11-29 05:43:05,202 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 307 transitions. Word has length 295 [2023-11-29 05:43:05,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:05,202 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 307 transitions. [2023-11-29 05:43:05,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 5.781818181818182) internal successors, (318), 54 states have internal predecessors, (318), 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) [2023-11-29 05:43:05,202 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 307 transitions. [2023-11-29 05:43:05,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-11-29 05:43:05,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:05,204 INFO L195 NwaCegarLoop]: trace histogram [50, 49, 49, 49, 49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:05,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-11-29 05:43:05,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-29 05:43:05,404 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:05,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:05,405 INFO L85 PathProgramCache]: Analyzing trace with hash -527220563, now seen corresponding path program 58 times [2023-11-29 05:43:05,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:05,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063054459] [2023-11-29 05:43:05,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:05,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7154 backedges. 4658 proven. 2496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:10,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:10,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063054459] [2023-11-29 05:43:10,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063054459] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:10,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037702192] [2023-11-29 05:43:10,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:43:10,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:10,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:10,923 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:10,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-29 05:43:11,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:43:11,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:11,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 101 conjunts are in the unsatisfiable core [2023-11-29 05:43:11,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7154 backedges. 4802 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:15,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7154 backedges. 4802 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:17,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037702192] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:43:17,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:43:17,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 155 [2023-11-29 05:43:17,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717025339] [2023-11-29 05:43:17,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:43:17,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2023-11-29 05:43:17,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:17,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2023-11-29 05:43:17,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5410, Invalid=18460, Unknown=0, NotChecked=0, Total=23870 [2023-11-29 05:43:17,908 INFO L87 Difference]: Start difference. First operand 304 states and 307 transitions. Second operand has 155 states, 155 states have (on average 3.329032258064516) internal successors, (516), 155 states have internal predecessors, (516), 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) [2023-11-29 05:43:22,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:22,931 INFO L93 Difference]: Finished difference Result 906 states and 1011 transitions. [2023-11-29 05:43:22,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-11-29 05:43:22,931 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 3.329032258064516) internal successors, (516), 155 states have internal predecessors, (516), 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 303 [2023-11-29 05:43:22,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:22,934 INFO L225 Difference]: With dead ends: 906 [2023-11-29 05:43:22,934 INFO L226 Difference]: Without dead ends: 508 [2023-11-29 05:43:22,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 457 SyntacticMatches, 95 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21589 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=15559, Invalid=48703, Unknown=0, NotChecked=0, Total=64262 [2023-11-29 05:43:22,938 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 994 mSDsluCounter, 1373 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 1910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:22,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 1474 Invalid, 1910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1636 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 05:43:22,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2023-11-29 05:43:22,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 308. [2023-11-29 05:43:22,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.013029315960912) internal successors, (311), 307 states have internal predecessors, (311), 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) [2023-11-29 05:43:22,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 311 transitions. [2023-11-29 05:43:22,967 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 311 transitions. Word has length 303 [2023-11-29 05:43:22,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:22,967 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 311 transitions. [2023-11-29 05:43:22,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 3.329032258064516) internal successors, (516), 155 states have internal predecessors, (516), 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) [2023-11-29 05:43:22,967 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 311 transitions. [2023-11-29 05:43:22,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-29 05:43:22,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:22,968 INFO L195 NwaCegarLoop]: trace histogram [51, 50, 50, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:22,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-11-29 05:43:23,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2023-11-29 05:43:23,169 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:23,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:23,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2078822473, now seen corresponding path program 59 times [2023-11-29 05:43:23,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:23,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052309203] [2023-11-29 05:43:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:23,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7352 backedges. 2450 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:26,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:26,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052309203] [2023-11-29 05:43:26,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052309203] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:26,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241672344] [2023-11-29 05:43:26,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:43:26,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:26,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:26,470 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:26,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-11-29 05:43:26,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2023-11-29 05:43:26,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:26,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 106 conjunts are in the unsatisfiable core [2023-11-29 05:43:26,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7352 backedges. 2550 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:27,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7352 backedges. 2550 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:29,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241672344] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:43:29,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:43:29,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 56 [2023-11-29 05:43:29,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323159043] [2023-11-29 05:43:29,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:43:29,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-29 05:43:29,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:29,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-29 05:43:29,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1440, Invalid=1752, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 05:43:29,069 INFO L87 Difference]: Start difference. First operand 308 states and 311 transitions. Second operand has 57 states, 57 states have (on average 5.7894736842105265) internal successors, (330), 56 states have internal predecessors, (330), 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) [2023-11-29 05:43:30,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:30,181 INFO L93 Difference]: Finished difference Result 325 states and 329 transitions. [2023-11-29 05:43:30,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-11-29 05:43:30,181 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 5.7894736842105265) internal successors, (330), 56 states have internal predecessors, (330), 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 307 [2023-11-29 05:43:30,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:30,183 INFO L225 Difference]: With dead ends: 325 [2023-11-29 05:43:30,183 INFO L226 Difference]: Without dead ends: 323 [2023-11-29 05:43:30,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 560 SyntacticMatches, 99 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5737 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4351, Invalid=7421, Unknown=0, NotChecked=0, Total=11772 [2023-11-29 05:43:30,184 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 66 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:30,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 479 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:43:30,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-11-29 05:43:30,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 316. [2023-11-29 05:43:30,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.0126984126984127) internal successors, (319), 315 states have internal predecessors, (319), 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) [2023-11-29 05:43:30,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 319 transitions. [2023-11-29 05:43:30,207 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 319 transitions. Word has length 307 [2023-11-29 05:43:30,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:30,207 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 319 transitions. [2023-11-29 05:43:30,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 5.7894736842105265) internal successors, (330), 56 states have internal predecessors, (330), 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) [2023-11-29 05:43:30,207 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 319 transitions. [2023-11-29 05:43:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2023-11-29 05:43:30,208 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:30,208 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 51, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:30,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-11-29 05:43:30,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:30,409 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:30,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:30,409 INFO L85 PathProgramCache]: Analyzing trace with hash -340764003, now seen corresponding path program 60 times [2023-11-29 05:43:30,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:30,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994852255] [2023-11-29 05:43:30,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:30,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7752 backedges. 5052 proven. 2700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:35,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:35,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994852255] [2023-11-29 05:43:35,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994852255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:35,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662333982] [2023-11-29 05:43:35,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:43:35,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:35,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:35,946 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:35,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-11-29 05:43:36,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2023-11-29 05:43:36,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:36,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 105 conjunts are in the unsatisfiable core [2023-11-29 05:43:36,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7752 backedges. 5202 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:40,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7752 backedges. 5202 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:44,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662333982] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:43:44,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:43:44,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105, 105] total 161 [2023-11-29 05:43:44,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834396019] [2023-11-29 05:43:44,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:43:44,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2023-11-29 05:43:44,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:44,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2023-11-29 05:43:44,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5834, Invalid=19926, Unknown=0, NotChecked=0, Total=25760 [2023-11-29 05:43:44,235 INFO L87 Difference]: Start difference. First operand 316 states and 319 transitions. Second operand has 161 states, 161 states have (on average 3.329192546583851) internal successors, (536), 161 states have internal predecessors, (536), 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) [2023-11-29 05:43:49,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:49,970 INFO L93 Difference]: Finished difference Result 942 states and 1051 transitions. [2023-11-29 05:43:49,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2023-11-29 05:43:49,970 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 3.329192546583851) internal successors, (536), 161 states have internal predecessors, (536), 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 315 [2023-11-29 05:43:49,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:49,972 INFO L225 Difference]: With dead ends: 942 [2023-11-29 05:43:49,972 INFO L226 Difference]: Without dead ends: 528 [2023-11-29 05:43:49,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 475 SyntacticMatches, 99 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23338 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=16805, Invalid=52627, Unknown=0, NotChecked=0, Total=69432 [2023-11-29 05:43:49,976 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 1082 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 2138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:49,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1082 Valid, 1663 Invalid, 2138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 05:43:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2023-11-29 05:43:50,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 320. [2023-11-29 05:43:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.0125391849529781) internal successors, (323), 319 states have internal predecessors, (323), 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) [2023-11-29 05:43:50,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 323 transitions. [2023-11-29 05:43:50,001 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 323 transitions. Word has length 315 [2023-11-29 05:43:50,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:50,001 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 323 transitions. [2023-11-29 05:43:50,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 3.329192546583851) internal successors, (536), 161 states have internal predecessors, (536), 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) [2023-11-29 05:43:50,001 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 323 transitions. [2023-11-29 05:43:50,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-11-29 05:43:50,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:50,003 INFO L195 NwaCegarLoop]: trace histogram [53, 52, 52, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:50,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-11-29 05:43:50,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:50,203 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:50,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:50,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1977316697, now seen corresponding path program 61 times [2023-11-29 05:43:50,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:50,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591236386] [2023-11-29 05:43:50,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:50,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7958 backedges. 2652 proven. 5306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:53,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:53,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591236386] [2023-11-29 05:43:53,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591236386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:53,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391666393] [2023-11-29 05:43:53,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:43:53,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:53,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:53,543 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:53,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-11-29 05:43:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:53,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 110 conjunts are in the unsatisfiable core [2023-11-29 05:43:53,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7958 backedges. 2756 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:53,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7958 backedges. 2756 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:56,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391666393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:43:56,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:43:56,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 58 [2023-11-29 05:43:56,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530015] [2023-11-29 05:43:56,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:43:56,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-29 05:43:56,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:56,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-29 05:43:56,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1549, Invalid=1873, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 05:43:56,256 INFO L87 Difference]: Start difference. First operand 320 states and 323 transitions. Second operand has 59 states, 59 states have (on average 5.796610169491525) internal successors, (342), 58 states have internal predecessors, (342), 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) [2023-11-29 05:43:57,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:43:57,596 INFO L93 Difference]: Finished difference Result 337 states and 341 transitions. [2023-11-29 05:43:57,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-11-29 05:43:57,597 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 5.796610169491525) internal successors, (342), 58 states have internal predecessors, (342), 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 319 [2023-11-29 05:43:57,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:43:57,598 INFO L225 Difference]: With dead ends: 337 [2023-11-29 05:43:57,598 INFO L226 Difference]: Without dead ends: 335 [2023-11-29 05:43:57,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 796 GetRequests, 582 SyntacticMatches, 103 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6175 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4680, Invalid=7976, Unknown=0, NotChecked=0, Total=12656 [2023-11-29 05:43:57,600 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 64 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:43:57,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 511 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:43:57,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2023-11-29 05:43:57,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 328. [2023-11-29 05:43:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.0122324159021407) internal successors, (331), 327 states have internal predecessors, (331), 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) [2023-11-29 05:43:57,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 331 transitions. [2023-11-29 05:43:57,637 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 331 transitions. Word has length 319 [2023-11-29 05:43:57,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:43:57,637 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 331 transitions. [2023-11-29 05:43:57,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 5.796610169491525) internal successors, (342), 58 states have internal predecessors, (342), 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) [2023-11-29 05:43:57,637 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 331 transitions. [2023-11-29 05:43:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2023-11-29 05:43:57,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:43:57,639 INFO L195 NwaCegarLoop]: trace histogram [54, 53, 53, 53, 53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:57,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-11-29 05:43:57,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-11-29 05:43:57,840 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:43:57,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:57,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1818969485, now seen corresponding path program 62 times [2023-11-29 05:43:57,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:57,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132187280] [2023-11-29 05:43:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:57,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8374 backedges. 5462 proven. 2912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:03,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:03,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132187280] [2023-11-29 05:44:03,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132187280] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:44:03,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372057021] [2023-11-29 05:44:03,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:44:03,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:44:03,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:44:03,986 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:44:03,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-29 05:44:04,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:44:04,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:44:04,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-29 05:44:04,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8374 backedges. 5616 proven. 2756 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:44:08,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:44:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8374 backedges. 5616 proven. 2756 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:44:12,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372057021] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:44:12,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:44:12,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 108, 108] total 164 [2023-11-29 05:44:12,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633591927] [2023-11-29 05:44:12,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:44:12,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2023-11-29 05:44:12,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:12,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2023-11-29 05:44:12,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5998, Invalid=20734, Unknown=0, NotChecked=0, Total=26732 [2023-11-29 05:44:12,676 INFO L87 Difference]: Start difference. First operand 328 states and 331 transitions. Second operand has 164 states, 164 states have (on average 3.3353658536585367) internal successors, (547), 164 states have internal predecessors, (547), 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) [2023-11-29 05:44:16,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:44:16,643 INFO L93 Difference]: Finished difference Result 759 states and 869 transitions. [2023-11-29 05:44:16,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-11-29 05:44:16,643 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 3.3353658536585367) internal successors, (547), 164 states have internal predecessors, (547), 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 327 [2023-11-29 05:44:16,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:44:16,646 INFO L225 Difference]: With dead ends: 759 [2023-11-29 05:44:16,646 INFO L226 Difference]: Without dead ends: 542 [2023-11-29 05:44:16,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 814 GetRequests, 495 SyntacticMatches, 104 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17571 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=11724, Invalid=35148, Unknown=0, NotChecked=0, Total=46872 [2023-11-29 05:44:16,648 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 863 mSDsluCounter, 1424 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 1922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:44:16,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 1533 Invalid, 1922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 05:44:16,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-11-29 05:44:16,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 330. [2023-11-29 05:44:16,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.012158054711246) internal successors, (333), 329 states have internal predecessors, (333), 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) [2023-11-29 05:44:16,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 333 transitions. [2023-11-29 05:44:16,674 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 333 transitions. Word has length 327 [2023-11-29 05:44:16,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:44:16,674 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 333 transitions. [2023-11-29 05:44:16,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 3.3353658536585367) internal successors, (547), 164 states have internal predecessors, (547), 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) [2023-11-29 05:44:16,674 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 333 transitions. [2023-11-29 05:44:16,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-11-29 05:44:16,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:44:16,676 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:44:16,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-11-29 05:44:16,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-11-29 05:44:16,876 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:44:16,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:16,876 INFO L85 PathProgramCache]: Analyzing trace with hash -799762254, now seen corresponding path program 63 times [2023-11-29 05:44:16,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:44:16,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191598893] [2023-11-29 05:44:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:16,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:44:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8480 backedges. 5462 proven. 3018 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:23,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:23,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191598893] [2023-11-29 05:44:23,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191598893] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:44:23,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435432421] [2023-11-29 05:44:23,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:44:23,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:44:23,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:44:23,252 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:44:23,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-11-29 05:44:23,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2023-11-29 05:44:23,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:44:23,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 110 conjunts are in the unsatisfiable core [2023-11-29 05:44:23,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8480 backedges. 5618 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:28,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:44:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8480 backedges. 5618 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:31,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435432421] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:44:31,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:44:31,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110, 110] total 166 [2023-11-29 05:44:31,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332520250] [2023-11-29 05:44:31,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:44:31,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2023-11-29 05:44:31,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:31,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2023-11-29 05:44:31,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6163, Invalid=21227, Unknown=0, NotChecked=0, Total=27390 [2023-11-29 05:44:31,744 INFO L87 Difference]: Start difference. First operand 330 states and 333 transitions. Second operand has 166 states, 166 states have (on average 3.3072289156626504) internal successors, (549), 166 states have internal predecessors, (549), 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) [2023-11-29 05:44:35,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:44:35,631 INFO L93 Difference]: Finished difference Result 767 states and 879 transitions. [2023-11-29 05:44:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-11-29 05:44:35,632 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 3.3072289156626504) internal successors, (549), 166 states have internal predecessors, (549), 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 329 [2023-11-29 05:44:35,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:44:35,634 INFO L225 Difference]: With dead ends: 767 [2023-11-29 05:44:35,634 INFO L226 Difference]: Without dead ends: 548 [2023-11-29 05:44:35,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 496 SyntacticMatches, 106 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18012 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=12105, Invalid=36075, Unknown=0, NotChecked=0, Total=48180 [2023-11-29 05:44:35,638 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 835 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 1369 SdHoareTripleChecker+Invalid, 1742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:44:35,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [835 Valid, 1369 Invalid, 1742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1519 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 05:44:35,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-11-29 05:44:35,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 332. [2023-11-29 05:44:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.012084592145015) internal successors, (335), 331 states have internal predecessors, (335), 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) [2023-11-29 05:44:35,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 335 transitions. [2023-11-29 05:44:35,670 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 335 transitions. Word has length 329 [2023-11-29 05:44:35,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:44:35,670 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 335 transitions. [2023-11-29 05:44:35,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 3.3072289156626504) internal successors, (549), 166 states have internal predecessors, (549), 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) [2023-11-29 05:44:35,671 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 335 transitions. [2023-11-29 05:44:35,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-11-29 05:44:35,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:44:35,672 INFO L195 NwaCegarLoop]: trace histogram [55, 54, 54, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:44:35,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-11-29 05:44:35,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:44:35,873 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:44:35,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:35,873 INFO L85 PathProgramCache]: Analyzing trace with hash -550127977, now seen corresponding path program 64 times [2023-11-29 05:44:35,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:44:35,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107749119] [2023-11-29 05:44:35,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:35,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:44:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8588 backedges. 2862 proven. 5726 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:39,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:39,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107749119] [2023-11-29 05:44:39,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107749119] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:44:39,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982158243] [2023-11-29 05:44:39,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:44:39,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:44:39,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:44:39,671 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:44:39,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-11-29 05:44:39,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:44:39,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:44:39,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 114 conjunts are in the unsatisfiable core [2023-11-29 05:44:39,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8588 backedges. 2970 proven. 5618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:40,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:44:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8588 backedges. 2970 proven. 5618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:42,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982158243] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:44:42,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:44:42,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 60 [2023-11-29 05:44:42,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529929982] [2023-11-29 05:44:42,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:44:42,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-29 05:44:42,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:42,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-29 05:44:42,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1662, Invalid=1998, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 05:44:42,214 INFO L87 Difference]: Start difference. First operand 332 states and 335 transitions. Second operand has 61 states, 61 states have (on average 5.80327868852459) internal successors, (354), 60 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:44:43,389 INFO L93 Difference]: Finished difference Result 349 states and 353 transitions. [2023-11-29 05:44:43,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-11-29 05:44:43,390 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 5.80327868852459) internal successors, (354), 60 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 331 [2023-11-29 05:44:43,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:44:43,392 INFO L225 Difference]: With dead ends: 349 [2023-11-29 05:44:43,392 INFO L226 Difference]: Without dead ends: 347 [2023-11-29 05:44:43,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 826 GetRequests, 604 SyntacticMatches, 107 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6629 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5021, Invalid=8551, Unknown=0, NotChecked=0, Total=13572 [2023-11-29 05:44:43,393 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 119 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:44:43,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 494 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:44:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2023-11-29 05:44:43,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 340. [2023-11-29 05:44:43,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.0117994100294985) internal successors, (343), 339 states have internal predecessors, (343), 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) [2023-11-29 05:44:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 343 transitions. [2023-11-29 05:44:43,425 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 343 transitions. Word has length 331 [2023-11-29 05:44:43,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:44:43,425 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 343 transitions. [2023-11-29 05:44:43,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 5.80327868852459) internal successors, (354), 60 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:43,425 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 343 transitions. [2023-11-29 05:44:43,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2023-11-29 05:44:43,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:44:43,426 INFO L195 NwaCegarLoop]: trace histogram [56, 55, 55, 55, 55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:44:43,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-11-29 05:44:43,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-11-29 05:44:43,627 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:44:43,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:43,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1622572675, now seen corresponding path program 65 times [2023-11-29 05:44:43,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:44:43,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673023644] [2023-11-29 05:44:43,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:43,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:44:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9020 backedges. 5888 proven. 3132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:49,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:49,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673023644] [2023-11-29 05:44:49,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673023644] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:44:49,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708321813] [2023-11-29 05:44:49,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:44:49,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:44:49,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:44:49,862 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:44:49,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-11-29 05:44:50,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2023-11-29 05:44:50,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:44:50,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 113 conjunts are in the unsatisfiable core [2023-11-29 05:44:50,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9020 backedges. 6050 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:55,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:44:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9020 backedges. 6050 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:59,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708321813] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:44:59,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:44:59,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113, 113] total 173 [2023-11-29 05:44:59,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487387759] [2023-11-29 05:44:59,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:44:59,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2023-11-29 05:44:59,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:59,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2023-11-29 05:44:59,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6730, Invalid=23026, Unknown=0, NotChecked=0, Total=29756 [2023-11-29 05:44:59,499 INFO L87 Difference]: Start difference. First operand 340 states and 343 transitions. Second operand has 173 states, 173 states have (on average 3.3294797687861273) internal successors, (576), 173 states have internal predecessors, (576), 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) [2023-11-29 05:45:06,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:45:06,397 INFO L93 Difference]: Finished difference Result 1014 states and 1131 transitions. [2023-11-29 05:45:06,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2023-11-29 05:45:06,397 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 3.3294797687861273) internal successors, (576), 173 states have internal predecessors, (576), 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 339 [2023-11-29 05:45:06,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:45:06,400 INFO L225 Difference]: With dead ends: 1014 [2023-11-29 05:45:06,400 INFO L226 Difference]: Without dead ends: 568 [2023-11-29 05:45:06,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 511 SyntacticMatches, 107 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27040 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=19441, Invalid=60931, Unknown=0, NotChecked=0, Total=80372 [2023-11-29 05:45:06,405 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 1359 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1359 SdHoareTripleChecker+Valid, 1846 SdHoareTripleChecker+Invalid, 2395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:45:06,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1359 Valid, 1846 Invalid, 2395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 05:45:06,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2023-11-29 05:45:06,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 344. [2023-11-29 05:45:06,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.0116618075801749) internal successors, (347), 343 states have internal predecessors, (347), 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) [2023-11-29 05:45:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 347 transitions. [2023-11-29 05:45:06,436 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 347 transitions. Word has length 339 [2023-11-29 05:45:06,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:45:06,436 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 347 transitions. [2023-11-29 05:45:06,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 3.3294797687861273) internal successors, (576), 173 states have internal predecessors, (576), 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) [2023-11-29 05:45:06,436 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 347 transitions. [2023-11-29 05:45:06,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2023-11-29 05:45:06,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:45:06,438 INFO L195 NwaCegarLoop]: trace histogram [57, 56, 56, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:45:06,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2023-11-29 05:45:06,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-11-29 05:45:06,638 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:45:06,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:45:06,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1511043975, now seen corresponding path program 66 times [2023-11-29 05:45:06,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:45:06,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650912950] [2023-11-29 05:45:06,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:45:06,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:45:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:11,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9242 backedges. 3080 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:45:11,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:45:11,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650912950] [2023-11-29 05:45:11,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650912950] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:45:11,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235456408] [2023-11-29 05:45:11,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:45:11,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:45:11,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:45:11,280 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:45:11,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-11-29 05:45:11,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2023-11-29 05:45:11,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:45:11,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 118 conjunts are in the unsatisfiable core [2023-11-29 05:45:11,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:45:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9242 backedges. 3192 proven. 6050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:45:12,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:45:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9242 backedges. 3192 proven. 6050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:45:14,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235456408] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:45:14,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:45:14,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 62 [2023-11-29 05:45:14,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661315030] [2023-11-29 05:45:14,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:45:14,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-29 05:45:14,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:45:14,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-29 05:45:14,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1779, Invalid=2127, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 05:45:14,611 INFO L87 Difference]: Start difference. First operand 344 states and 347 transitions. Second operand has 63 states, 63 states have (on average 5.809523809523809) internal successors, (366), 62 states have internal predecessors, (366), 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) [2023-11-29 05:45:16,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:45:16,018 INFO L93 Difference]: Finished difference Result 361 states and 365 transitions. [2023-11-29 05:45:16,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-11-29 05:45:16,019 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 5.809523809523809) internal successors, (366), 62 states have internal predecessors, (366), 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 343 [2023-11-29 05:45:16,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:45:16,021 INFO L225 Difference]: With dead ends: 361 [2023-11-29 05:45:16,021 INFO L226 Difference]: Without dead ends: 359 [2023-11-29 05:45:16,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 626 SyntacticMatches, 111 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7099 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5374, Invalid=9146, Unknown=0, NotChecked=0, Total=14520 [2023-11-29 05:45:16,023 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 72 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:45:16,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 564 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:45:16,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-11-29 05:45:16,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 352. [2023-11-29 05:45:16,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.0113960113960114) internal successors, (355), 351 states have internal predecessors, (355), 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) [2023-11-29 05:45:16,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 355 transitions. [2023-11-29 05:45:16,058 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 355 transitions. Word has length 343 [2023-11-29 05:45:16,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:45:16,058 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 355 transitions. [2023-11-29 05:45:16,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 5.809523809523809) internal successors, (366), 62 states have internal predecessors, (366), 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) [2023-11-29 05:45:16,058 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 355 transitions. [2023-11-29 05:45:16,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2023-11-29 05:45:16,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:45:16,060 INFO L195 NwaCegarLoop]: trace histogram [58, 57, 57, 57, 57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:45:16,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-11-29 05:45:16,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-11-29 05:45:16,260 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:45:16,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:45:16,261 INFO L85 PathProgramCache]: Analyzing trace with hash -40858003, now seen corresponding path program 67 times [2023-11-29 05:45:16,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:45:16,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503001138] [2023-11-29 05:45:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:45:16,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:45:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:23,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9690 backedges. 6330 proven. 3360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:45:23,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:45:23,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503001138] [2023-11-29 05:45:23,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503001138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:45:23,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927130485] [2023-11-29 05:45:23,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:45:23,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:45:23,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:45:23,700 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:45:23,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-11-29 05:45:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:23,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 116 conjunts are in the unsatisfiable core [2023-11-29 05:45:23,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:45:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9690 backedges. 6496 proven. 3192 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:45:29,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:45:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9690 backedges. 6496 proven. 3192 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:45:32,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927130485] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:45:32,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:45:32,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 116, 116] total 176 [2023-11-29 05:45:32,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868414430] [2023-11-29 05:45:32,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:45:32,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2023-11-29 05:45:32,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:45:32,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2023-11-29 05:45:32,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6906, Invalid=23894, Unknown=0, NotChecked=0, Total=30800 [2023-11-29 05:45:32,868 INFO L87 Difference]: Start difference. First operand 352 states and 355 transitions. Second operand has 176 states, 176 states have (on average 3.335227272727273) internal successors, (587), 176 states have internal predecessors, (587), 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) [2023-11-29 05:45:36,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:45:36,634 INFO L93 Difference]: Finished difference Result 815 states and 933 transitions. [2023-11-29 05:45:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-11-29 05:45:36,634 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 3.335227272727273) internal successors, (587), 176 states have internal predecessors, (587), 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 351 [2023-11-29 05:45:36,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:45:36,636 INFO L225 Difference]: With dead ends: 815 [2023-11-29 05:45:36,636 INFO L226 Difference]: Without dead ends: 582 [2023-11-29 05:45:36,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 874 GetRequests, 531 SyntacticMatches, 112 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20267 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=13520, Invalid=40536, Unknown=0, NotChecked=0, Total=54056 [2023-11-29 05:45:36,639 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 884 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 1707 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:45:36,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 1537 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1707 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 05:45:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2023-11-29 05:45:36,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 354. [2023-11-29 05:45:36,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.0113314447592068) internal successors, (357), 353 states have internal predecessors, (357), 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) [2023-11-29 05:45:36,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 357 transitions. [2023-11-29 05:45:36,666 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 357 transitions. Word has length 351 [2023-11-29 05:45:36,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:45:36,667 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 357 transitions. [2023-11-29 05:45:36,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 3.335227272727273) internal successors, (587), 176 states have internal predecessors, (587), 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) [2023-11-29 05:45:36,667 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 357 transitions. [2023-11-29 05:45:36,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-11-29 05:45:36,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:45:36,668 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:45:36,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-11-29 05:45:36,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-11-29 05:45:36,869 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:45:36,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:45:36,869 INFO L85 PathProgramCache]: Analyzing trace with hash 980157074, now seen corresponding path program 68 times [2023-11-29 05:45:36,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:45:36,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764272413] [2023-11-29 05:45:36,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:45:36,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:45:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9804 backedges. 6330 proven. 3474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:45:43,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:45:43,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764272413] [2023-11-29 05:45:43,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764272413] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:45:43,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782836795] [2023-11-29 05:45:43,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:45:43,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:45:43,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:45:43,011 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:45:43,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-11-29 05:45:43,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:45:43,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:45:43,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 1299 conjuncts, 118 conjunts are in the unsatisfiable core [2023-11-29 05:45:43,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:45:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9804 backedges. 6498 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:45:47,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:45:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9804 backedges. 6498 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:45:51,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782836795] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:45:51,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:45:51,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118, 118] total 178 [2023-11-29 05:45:51,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345108728] [2023-11-29 05:45:51,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:45:51,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2023-11-29 05:45:51,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:45:51,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2023-11-29 05:45:51,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7083, Invalid=24423, Unknown=0, NotChecked=0, Total=31506 [2023-11-29 05:45:51,601 INFO L87 Difference]: Start difference. First operand 354 states and 357 transitions. Second operand has 178 states, 178 states have (on average 3.308988764044944) internal successors, (589), 178 states have internal predecessors, (589), 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) [2023-11-29 05:45:55,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:45:55,071 INFO L93 Difference]: Finished difference Result 823 states and 943 transitions. [2023-11-29 05:45:55,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-11-29 05:45:55,071 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 178 states have (on average 3.308988764044944) internal successors, (589), 178 states have internal predecessors, (589), 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 353 [2023-11-29 05:45:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:45:55,074 INFO L225 Difference]: With dead ends: 823 [2023-11-29 05:45:55,074 INFO L226 Difference]: Without dead ends: 588 [2023-11-29 05:45:55,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 532 SyntacticMatches, 114 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20740 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=13929, Invalid=41531, Unknown=0, NotChecked=0, Total=55460 [2023-11-29 05:45:55,077 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 959 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:45:55,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [959 Valid, 1353 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1544 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 05:45:55,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2023-11-29 05:45:55,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 356. [2023-11-29 05:45:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.0112676056338028) internal successors, (359), 355 states have internal predecessors, (359), 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) [2023-11-29 05:45:55,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 359 transitions. [2023-11-29 05:45:55,106 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 359 transitions. Word has length 353 [2023-11-29 05:45:55,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:45:55,106 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 359 transitions. [2023-11-29 05:45:55,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 178 states have (on average 3.308988764044944) internal successors, (589), 178 states have internal predecessors, (589), 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) [2023-11-29 05:45:55,106 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 359 transitions. [2023-11-29 05:45:55,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2023-11-29 05:45:55,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:45:55,107 INFO L195 NwaCegarLoop]: trace histogram [59, 58, 58, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:45:55,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-11-29 05:45:55,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:45:55,308 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:45:55,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:45:55,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1371864713, now seen corresponding path program 69 times [2023-11-29 05:45:55,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:45:55,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931409572] [2023-11-29 05:45:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:45:55,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:45:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 3306 proven. 6614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:45:59,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:45:59,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931409572] [2023-11-29 05:45:59,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931409572] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:45:59,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15648546] [2023-11-29 05:45:59,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:45:59,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:45:59,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:45:59,414 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:45:59,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-11-29 05:45:59,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2023-11-29 05:45:59,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:45:59,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 1309 conjuncts, 122 conjunts are in the unsatisfiable core [2023-11-29 05:45:59,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:46:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 3422 proven. 6498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:46:00,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:46:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 3422 proven. 6498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:46:02,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15648546] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:46:02,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:46:02,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 64 [2023-11-29 05:46:02,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933068460] [2023-11-29 05:46:02,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:46:02,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-29 05:46:02,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:46:02,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-29 05:46:02,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1900, Invalid=2260, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 05:46:02,436 INFO L87 Difference]: Start difference. First operand 356 states and 359 transitions. Second operand has 65 states, 65 states have (on average 5.815384615384615) internal successors, (378), 64 states have internal predecessors, (378), 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) [2023-11-29 05:46:03,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:46:03,700 INFO L93 Difference]: Finished difference Result 373 states and 377 transitions. [2023-11-29 05:46:03,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-11-29 05:46:03,700 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 5.815384615384615) internal successors, (378), 64 states have internal predecessors, (378), 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 355 [2023-11-29 05:46:03,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:46:03,702 INFO L225 Difference]: With dead ends: 373 [2023-11-29 05:46:03,702 INFO L226 Difference]: Without dead ends: 371 [2023-11-29 05:46:03,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 648 SyntacticMatches, 115 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7585 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5739, Invalid=9761, Unknown=0, NotChecked=0, Total=15500 [2023-11-29 05:46:03,703 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 133 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:46:03,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 538 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:46:03,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-11-29 05:46:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 364. [2023-11-29 05:46:03,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.0110192837465564) internal successors, (367), 363 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:03,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 367 transitions. [2023-11-29 05:46:03,732 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 367 transitions. Word has length 355 [2023-11-29 05:46:03,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:46:03,732 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 367 transitions. [2023-11-29 05:46:03,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 5.815384615384615) internal successors, (378), 64 states have internal predecessors, (378), 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) [2023-11-29 05:46:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 367 transitions. [2023-11-29 05:46:03,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2023-11-29 05:46:03,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:46:03,734 INFO L195 NwaCegarLoop]: trace histogram [60, 59, 59, 59, 59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:46:03,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2023-11-29 05:46:03,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:46:03,934 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:46:03,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:46:03,935 INFO L85 PathProgramCache]: Analyzing trace with hash 491121757, now seen corresponding path program 70 times [2023-11-29 05:46:03,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:46:03,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189551186] [2023-11-29 05:46:03,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:46:03,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:46:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:46:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10384 backedges. 6788 proven. 3596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:46:10,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:46:10,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189551186] [2023-11-29 05:46:10,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189551186] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:46:10,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104823760] [2023-11-29 05:46:10,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:46:10,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:46:10,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:46:10,515 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:46:10,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-11-29 05:46:10,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:46:10,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:46:10,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 121 conjunts are in the unsatisfiable core [2023-11-29 05:46:10,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:46:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10384 backedges. 6962 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:46:16,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:46:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10384 backedges. 6962 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:46:19,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104823760] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:46:19,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:46:19,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121, 121] total 185 [2023-11-29 05:46:19,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548435474] [2023-11-29 05:46:19,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:46:19,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 185 states [2023-11-29 05:46:19,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:46:19,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2023-11-29 05:46:19,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7690, Invalid=26350, Unknown=0, NotChecked=0, Total=34040 [2023-11-29 05:46:19,978 INFO L87 Difference]: Start difference. First operand 364 states and 367 transitions. Second operand has 185 states, 185 states have (on average 3.32972972972973) internal successors, (616), 185 states have internal predecessors, (616), 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) [2023-11-29 05:46:26,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:46:26,966 INFO L93 Difference]: Finished difference Result 1086 states and 1211 transitions. [2023-11-29 05:46:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2023-11-29 05:46:26,967 INFO L78 Accepts]: Start accepts. Automaton has has 185 states, 185 states have (on average 3.32972972972973) internal successors, (616), 185 states have internal predecessors, (616), 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 363 [2023-11-29 05:46:26,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:46:26,969 INFO L225 Difference]: With dead ends: 1086 [2023-11-29 05:46:26,969 INFO L226 Difference]: Without dead ends: 608 [2023-11-29 05:46:26,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 964 GetRequests, 547 SyntacticMatches, 115 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31014 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=22269, Invalid=69843, Unknown=0, NotChecked=0, Total=92112 [2023-11-29 05:46:26,973 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 1238 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 2258 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 2061 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:46:26,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 2061 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2258 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 05:46:26,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2023-11-29 05:46:27,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 368. [2023-11-29 05:46:27,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.0108991825613078) internal successors, (371), 367 states have internal predecessors, (371), 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) [2023-11-29 05:46:27,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 371 transitions. [2023-11-29 05:46:27,005 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 371 transitions. Word has length 363 [2023-11-29 05:46:27,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:46:27,006 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 371 transitions. [2023-11-29 05:46:27,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 185 states, 185 states have (on average 3.32972972972973) internal successors, (616), 185 states have internal predecessors, (616), 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) [2023-11-29 05:46:27,006 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 371 transitions. [2023-11-29 05:46:27,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2023-11-29 05:46:27,007 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:46:27,007 INFO L195 NwaCegarLoop]: trace histogram [61, 60, 60, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:46:27,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-11-29 05:46:27,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:46:27,208 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:46:27,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:46:27,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1274683495, now seen corresponding path program 71 times [2023-11-29 05:46:27,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:46:27,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038882812] [2023-11-29 05:46:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:46:27,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:46:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:46:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10622 backedges. 3540 proven. 7082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:46:31,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:46:31,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038882812] [2023-11-29 05:46:31,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038882812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:46:31,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661998464] [2023-11-29 05:46:31,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:46:31,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:46:31,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:46:31,668 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:46:31,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-11-29 05:46:32,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2023-11-29 05:46:32,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:46:32,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 1353 conjuncts, 126 conjunts are in the unsatisfiable core [2023-11-29 05:46:32,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:46:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10622 backedges. 3660 proven. 6962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:46:32,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:46:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10622 backedges. 3660 proven. 6962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:46:34,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661998464] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:46:34,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:46:34,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 66 [2023-11-29 05:46:34,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224804760] [2023-11-29 05:46:34,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:46:34,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-11-29 05:46:34,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:46:34,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-11-29 05:46:34,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2025, Invalid=2397, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 05:46:34,932 INFO L87 Difference]: Start difference. First operand 368 states and 371 transitions. Second operand has 67 states, 67 states have (on average 5.82089552238806) internal successors, (390), 66 states have internal predecessors, (390), 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) [2023-11-29 05:46:36,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:46:36,217 INFO L93 Difference]: Finished difference Result 385 states and 389 transitions. [2023-11-29 05:46:36,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-11-29 05:46:36,218 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 5.82089552238806) internal successors, (390), 66 states have internal predecessors, (390), 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 367 [2023-11-29 05:46:36,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:46:36,220 INFO L225 Difference]: With dead ends: 385 [2023-11-29 05:46:36,220 INFO L226 Difference]: Without dead ends: 383 [2023-11-29 05:46:36,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 916 GetRequests, 670 SyntacticMatches, 119 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8087 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6116, Invalid=10396, Unknown=0, NotChecked=0, Total=16512 [2023-11-29 05:46:36,221 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 133 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:46:36,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 592 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:46:36,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-11-29 05:46:36,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 376. [2023-11-29 05:46:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 1.0106666666666666) internal successors, (379), 375 states have internal predecessors, (379), 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) [2023-11-29 05:46:36,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 379 transitions. [2023-11-29 05:46:36,253 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 379 transitions. Word has length 367 [2023-11-29 05:46:36,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:46:36,253 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 379 transitions. [2023-11-29 05:46:36,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 5.82089552238806) internal successors, (390), 66 states have internal predecessors, (390), 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) [2023-11-29 05:46:36,253 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 379 transitions. [2023-11-29 05:46:36,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2023-11-29 05:46:36,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:46:36,255 INFO L195 NwaCegarLoop]: trace histogram [62, 61, 61, 61, 61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:46:36,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-11-29 05:46:36,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:46:36,455 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:46:36,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:46:36,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1859183795, now seen corresponding path program 72 times [2023-11-29 05:46:36,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:46:36,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118543416] [2023-11-29 05:46:36,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:46:36,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:46:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:46:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11102 backedges. 7262 proven. 3840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:46:43,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:46:43,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118543416] [2023-11-29 05:46:43,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118543416] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:46:43,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600803104] [2023-11-29 05:46:43,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:46:43,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:46:43,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:46:43,540 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:46:43,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-11-29 05:46:43,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2023-11-29 05:46:43,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:46:43,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 1377 conjuncts, 125 conjunts are in the unsatisfiable core [2023-11-29 05:46:43,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:46:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11102 backedges. 7442 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:46:49,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:46:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11102 backedges. 7442 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:46:53,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600803104] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:46:53,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:46:53,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125, 125] total 191 [2023-11-29 05:46:53,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004112421] [2023-11-29 05:46:53,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:46:53,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2023-11-29 05:46:53,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:46:53,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2023-11-29 05:46:53,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8194, Invalid=28096, Unknown=0, NotChecked=0, Total=36290 [2023-11-29 05:46:53,427 INFO L87 Difference]: Start difference. First operand 376 states and 379 transitions. Second operand has 191 states, 191 states have (on average 3.329842931937173) internal successors, (636), 191 states have internal predecessors, (636), 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) [2023-11-29 05:47:00,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:00,461 INFO L93 Difference]: Finished difference Result 1122 states and 1251 transitions. [2023-11-29 05:47:00,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2023-11-29 05:47:00,461 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 3.329842931937173) internal successors, (636), 191 states have internal predecessors, (636), 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 375 [2023-11-29 05:47:00,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:00,463 INFO L225 Difference]: With dead ends: 1122 [2023-11-29 05:47:00,463 INFO L226 Difference]: Without dead ends: 628 [2023-11-29 05:47:00,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 565 SyntacticMatches, 119 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33103 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=23755, Invalid=74527, Unknown=0, NotChecked=0, Total=98282 [2023-11-29 05:47:00,468 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 1388 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 2095 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1388 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 2473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 2095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:00,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1388 Valid, 1892 Invalid, 2473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 2095 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 05:47:00,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2023-11-29 05:47:00,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 380. [2023-11-29 05:47:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 1.0105540897097625) internal successors, (383), 379 states have internal predecessors, (383), 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) [2023-11-29 05:47:00,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 383 transitions. [2023-11-29 05:47:00,502 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 383 transitions. Word has length 375 [2023-11-29 05:47:00,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:00,503 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 383 transitions. [2023-11-29 05:47:00,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 3.329842931937173) internal successors, (636), 191 states have internal predecessors, (636), 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) [2023-11-29 05:47:00,503 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 383 transitions. [2023-11-29 05:47:00,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2023-11-29 05:47:00,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:00,504 INFO L195 NwaCegarLoop]: trace histogram [63, 62, 62, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:00,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2023-11-29 05:47:00,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:00,705 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:00,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:00,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1079218263, now seen corresponding path program 73 times [2023-11-29 05:47:00,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:00,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056868680] [2023-11-29 05:47:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:00,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 11348 backedges. 3782 proven. 7566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:05,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:05,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056868680] [2023-11-29 05:47:05,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056868680] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:05,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257269337] [2023-11-29 05:47:05,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:47:05,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:05,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:05,568 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:05,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-11-29 05:47:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:05,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 130 conjunts are in the unsatisfiable core [2023-11-29 05:47:05,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11348 backedges. 3906 proven. 7442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:06,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11348 backedges. 3906 proven. 7442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:09,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257269337] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:09,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:09,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 68 [2023-11-29 05:47:09,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457243311] [2023-11-29 05:47:09,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:09,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-11-29 05:47:09,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:09,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-11-29 05:47:09,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2154, Invalid=2538, Unknown=0, NotChecked=0, Total=4692 [2023-11-29 05:47:09,422 INFO L87 Difference]: Start difference. First operand 380 states and 383 transitions. Second operand has 69 states, 69 states have (on average 5.826086956521739) internal successors, (402), 68 states have internal predecessors, (402), 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) [2023-11-29 05:47:11,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:11,238 INFO L93 Difference]: Finished difference Result 397 states and 401 transitions. [2023-11-29 05:47:11,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-11-29 05:47:11,239 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 5.826086956521739) internal successors, (402), 68 states have internal predecessors, (402), 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 379 [2023-11-29 05:47:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:11,242 INFO L225 Difference]: With dead ends: 397 [2023-11-29 05:47:11,242 INFO L226 Difference]: Without dead ends: 395 [2023-11-29 05:47:11,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 946 GetRequests, 692 SyntacticMatches, 123 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8605 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6505, Invalid=11051, Unknown=0, NotChecked=0, Total=17556 [2023-11-29 05:47:11,244 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 135 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:11,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 545 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:47:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-11-29 05:47:11,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 388. [2023-11-29 05:47:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.0103359173126616) internal successors, (391), 387 states have internal predecessors, (391), 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) [2023-11-29 05:47:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 391 transitions. [2023-11-29 05:47:11,288 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 391 transitions. Word has length 379 [2023-11-29 05:47:11,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:11,289 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 391 transitions. [2023-11-29 05:47:11,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 5.826086956521739) internal successors, (402), 68 states have internal predecessors, (402), 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) [2023-11-29 05:47:11,289 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 391 transitions. [2023-11-29 05:47:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2023-11-29 05:47:11,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:11,291 INFO L195 NwaCegarLoop]: trace histogram [64, 63, 63, 63, 63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:11,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2023-11-29 05:47:11,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:11,491 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:11,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:11,492 INFO L85 PathProgramCache]: Analyzing trace with hash -925787331, now seen corresponding path program 74 times [2023-11-29 05:47:11,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:11,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334245705] [2023-11-29 05:47:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:11,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11844 backedges. 7752 proven. 4092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:20,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:20,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334245705] [2023-11-29 05:47:20,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334245705] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:20,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355999297] [2023-11-29 05:47:20,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:47:20,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:20,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:20,711 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:20,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-11-29 05:47:20,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:47:20,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:47:20,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 1421 conjuncts, 128 conjunts are in the unsatisfiable core [2023-11-29 05:47:20,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11844 backedges. 7936 proven. 3906 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:47:26,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11844 backedges. 7936 proven. 3906 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:47:31,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355999297] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:31,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:31,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 128, 128] total 194 [2023-11-29 05:47:31,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879555932] [2023-11-29 05:47:31,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:31,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2023-11-29 05:47:31,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:31,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2023-11-29 05:47:31,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8388, Invalid=29054, Unknown=0, NotChecked=0, Total=37442 [2023-11-29 05:47:31,797 INFO L87 Difference]: Start difference. First operand 388 states and 391 transitions. Second operand has 194 states, 194 states have (on average 3.3350515463917527) internal successors, (647), 194 states have internal predecessors, (647), 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) [2023-11-29 05:47:37,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:47:37,930 INFO L93 Difference]: Finished difference Result 899 states and 1029 transitions. [2023-11-29 05:47:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-11-29 05:47:37,930 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 3.3350515463917527) internal successors, (647), 194 states have internal predecessors, (647), 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 387 [2023-11-29 05:47:37,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:47:37,934 INFO L225 Difference]: With dead ends: 899 [2023-11-29 05:47:37,934 INFO L226 Difference]: Without dead ends: 642 [2023-11-29 05:47:37,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 964 GetRequests, 585 SyntacticMatches, 124 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24671 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=16454, Invalid=49338, Unknown=0, NotChecked=0, Total=65792 [2023-11-29 05:47:37,939 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 1121 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 2119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:47:37,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1121 Valid, 1625 Invalid, 2119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 05:47:37,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2023-11-29 05:47:37,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 390. [2023-11-29 05:47:37,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0102827763496145) internal successors, (393), 389 states have internal predecessors, (393), 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) [2023-11-29 05:47:37,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 393 transitions. [2023-11-29 05:47:37,985 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 393 transitions. Word has length 387 [2023-11-29 05:47:37,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:47:37,986 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 393 transitions. [2023-11-29 05:47:37,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 3.3350515463917527) internal successors, (647), 194 states have internal predecessors, (647), 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) [2023-11-29 05:47:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 393 transitions. [2023-11-29 05:47:37,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2023-11-29 05:47:37,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:47:37,988 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:37,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2023-11-29 05:47:38,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-11-29 05:47:38,188 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:47:38,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:38,189 INFO L85 PathProgramCache]: Analyzing trace with hash -683368222, now seen corresponding path program 75 times [2023-11-29 05:47:38,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:38,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257707797] [2023-11-29 05:47:38,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:38,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11970 backedges. 7752 proven. 4218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:46,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:46,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257707797] [2023-11-29 05:47:46,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257707797] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:46,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245837388] [2023-11-29 05:47:46,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:47:46,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:46,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:46,873 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:46,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-11-29 05:47:47,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2023-11-29 05:47:47,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:47:47,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 1431 conjuncts, 130 conjunts are in the unsatisfiable core [2023-11-29 05:47:47,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:53,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11970 backedges. 7938 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:53,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11970 backedges. 7938 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:58,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245837388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:58,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:58,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130, 130] total 196 [2023-11-29 05:47:58,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642186621] [2023-11-29 05:47:58,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:58,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2023-11-29 05:47:58,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:58,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2023-11-29 05:47:58,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8583, Invalid=29637, Unknown=0, NotChecked=0, Total=38220 [2023-11-29 05:47:58,456 INFO L87 Difference]: Start difference. First operand 390 states and 393 transitions. Second operand has 196 states, 196 states have (on average 3.311224489795918) internal successors, (649), 196 states have internal predecessors, (649), 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) [2023-11-29 05:48:03,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:03,912 INFO L93 Difference]: Finished difference Result 907 states and 1039 transitions. [2023-11-29 05:48:03,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2023-11-29 05:48:03,912 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 196 states have (on average 3.311224489795918) internal successors, (649), 196 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 389 [2023-11-29 05:48:03,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:03,916 INFO L225 Difference]: With dead ends: 907 [2023-11-29 05:48:03,917 INFO L226 Difference]: Without dead ends: 648 [2023-11-29 05:48:03,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 586 SyntacticMatches, 126 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25192 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=16905, Invalid=50435, Unknown=0, NotChecked=0, Total=67340 [2023-11-29 05:48:03,921 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 1137 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:03,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1137 Valid, 1628 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1829 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 05:48:03,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2023-11-29 05:48:03,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 392. [2023-11-29 05:48:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.010230179028133) internal successors, (395), 391 states have internal predecessors, (395), 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) [2023-11-29 05:48:03,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 395 transitions. [2023-11-29 05:48:03,967 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 395 transitions. Word has length 389 [2023-11-29 05:48:03,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:03,967 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 395 transitions. [2023-11-29 05:48:03,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 196 states have (on average 3.311224489795918) internal successors, (649), 196 states have internal predecessors, (649), 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) [2023-11-29 05:48:03,967 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 395 transitions. [2023-11-29 05:48:03,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2023-11-29 05:48:03,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:03,969 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:48:03,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2023-11-29 05:48:04,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:04,170 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:04,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:04,170 INFO L85 PathProgramCache]: Analyzing trace with hash 353161543, now seen corresponding path program 76 times [2023-11-29 05:48:04,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:04,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275625171] [2023-11-29 05:48:04,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:04,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12098 backedges. 4032 proven. 8066 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:48:10,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:10,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275625171] [2023-11-29 05:48:10,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275625171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:10,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559765589] [2023-11-29 05:48:10,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:48:10,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:10,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:10,153 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:10,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-11-29 05:48:10,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:48:10,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:48:10,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 1441 conjuncts, 134 conjunts are in the unsatisfiable core [2023-11-29 05:48:10,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12098 backedges. 4160 proven. 7938 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:48:10,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12098 backedges. 4160 proven. 7938 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:48:14,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559765589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:48:14,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:48:14,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 70 [2023-11-29 05:48:14,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838569342] [2023-11-29 05:48:14,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:48:14,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-29 05:48:14,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:14,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-29 05:48:14,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2287, Invalid=2683, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 05:48:14,034 INFO L87 Difference]: Start difference. First operand 392 states and 395 transitions. Second operand has 71 states, 71 states have (on average 5.830985915492958) internal successors, (414), 70 states have internal predecessors, (414), 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) [2023-11-29 05:48:15,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:15,707 INFO L93 Difference]: Finished difference Result 409 states and 413 transitions. [2023-11-29 05:48:15,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2023-11-29 05:48:15,708 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 5.830985915492958) internal successors, (414), 70 states have internal predecessors, (414), 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 391 [2023-11-29 05:48:15,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:15,711 INFO L225 Difference]: With dead ends: 409 [2023-11-29 05:48:15,711 INFO L226 Difference]: Without dead ends: 407 [2023-11-29 05:48:15,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 714 SyntacticMatches, 127 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9139 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=6906, Invalid=11726, Unknown=0, NotChecked=0, Total=18632 [2023-11-29 05:48:15,713 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 76 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:15,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 614 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:48:15,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2023-11-29 05:48:15,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 400. [2023-11-29 05:48:15,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.0100250626566416) internal successors, (403), 399 states have internal predecessors, (403), 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) [2023-11-29 05:48:15,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 403 transitions. [2023-11-29 05:48:15,759 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 403 transitions. Word has length 391 [2023-11-29 05:48:15,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:15,759 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 403 transitions. [2023-11-29 05:48:15,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 5.830985915492958) internal successors, (414), 70 states have internal predecessors, (414), 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) [2023-11-29 05:48:15,759 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 403 transitions. [2023-11-29 05:48:15,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2023-11-29 05:48:15,761 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:15,761 INFO L195 NwaCegarLoop]: trace histogram [66, 65, 65, 65, 65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:48:15,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2023-11-29 05:48:15,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:15,962 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:15,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:15,962 INFO L85 PathProgramCache]: Analyzing trace with hash -260903891, now seen corresponding path program 77 times [2023-11-29 05:48:15,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:15,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505442257] [2023-11-29 05:48:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:15,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12610 backedges. 8258 proven. 4352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:48:25,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:25,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505442257] [2023-11-29 05:48:25,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505442257] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:25,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400179391] [2023-11-29 05:48:25,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:48:25,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:25,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:25,591 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:25,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-11-29 05:48:26,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2023-11-29 05:48:26,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:48:26,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 133 conjunts are in the unsatisfiable core [2023-11-29 05:48:26,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12610 backedges. 8450 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:48:32,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12610 backedges. 8450 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:48:38,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400179391] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:48:38,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:48:38,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133, 133] total 203 [2023-11-29 05:48:38,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195352627] [2023-11-29 05:48:38,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:48:38,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-11-29 05:48:38,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:38,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-11-29 05:48:38,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9250, Invalid=31756, Unknown=0, NotChecked=0, Total=41006 [2023-11-29 05:48:38,181 INFO L87 Difference]: Start difference. First operand 400 states and 403 transitions. Second operand has 203 states, 203 states have (on average 3.3300492610837438) internal successors, (676), 203 states have internal predecessors, (676), 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) [2023-11-29 05:48:48,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:48:48,186 INFO L93 Difference]: Finished difference Result 1194 states and 1331 transitions. [2023-11-29 05:48:48,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2023-11-29 05:48:48,186 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 3.3300492610837438) internal successors, (676), 203 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 399 [2023-11-29 05:48:48,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:48:48,190 INFO L225 Difference]: With dead ends: 1194 [2023-11-29 05:48:48,190 INFO L226 Difference]: Without dead ends: 668 [2023-11-29 05:48:48,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1060 GetRequests, 601 SyntacticMatches, 127 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37485 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=26871, Invalid=84351, Unknown=0, NotChecked=0, Total=111222 [2023-11-29 05:48:48,198 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 1446 mSDsluCounter, 2186 mSDsCounter, 0 mSdLazyCounter, 2528 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1446 SdHoareTripleChecker+Valid, 2319 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 2528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:48:48,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1446 Valid, 2319 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 2528 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 05:48:48,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2023-11-29 05:48:48,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 404. [2023-11-29 05:48:48,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.0099255583126552) internal successors, (407), 403 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:48,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 407 transitions. [2023-11-29 05:48:48,250 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 407 transitions. Word has length 399 [2023-11-29 05:48:48,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:48:48,250 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 407 transitions. [2023-11-29 05:48:48,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 3.3300492610837438) internal successors, (676), 203 states have internal predecessors, (676), 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) [2023-11-29 05:48:48,250 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 407 transitions. [2023-11-29 05:48:48,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2023-11-29 05:48:48,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:48:48,252 INFO L195 NwaCegarLoop]: trace histogram [67, 66, 66, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:48:48,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2023-11-29 05:48:48,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-11-29 05:48:48,453 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:48:48,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:48,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1330945225, now seen corresponding path program 78 times [2023-11-29 05:48:48,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:48,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572671020] [2023-11-29 05:48:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:48,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12872 backedges. 4290 proven. 8582 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:48:54,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:54,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572671020] [2023-11-29 05:48:54,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572671020] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:54,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789965790] [2023-11-29 05:48:54,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:48:54,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:54,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:54,955 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:54,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-11-29 05:48:55,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2023-11-29 05:48:55,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:48:55,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 1485 conjuncts, 138 conjunts are in the unsatisfiable core [2023-11-29 05:48:55,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12872 backedges. 4422 proven. 8450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:48:56,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12872 backedges. 4422 proven. 8450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:48:59,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789965790] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:48:59,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:48:59,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 72 [2023-11-29 05:48:59,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063421758] [2023-11-29 05:48:59,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:48:59,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-11-29 05:48:59,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:59,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-11-29 05:48:59,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2424, Invalid=2832, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 05:48:59,567 INFO L87 Difference]: Start difference. First operand 404 states and 407 transitions. Second operand has 73 states, 73 states have (on average 5.835616438356165) internal successors, (426), 72 states have internal predecessors, (426), 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) [2023-11-29 05:49:01,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:01,243 INFO L93 Difference]: Finished difference Result 421 states and 425 transitions. [2023-11-29 05:49:01,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2023-11-29 05:49:01,243 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 5.835616438356165) internal successors, (426), 72 states have internal predecessors, (426), 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 403 [2023-11-29 05:49:01,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:01,245 INFO L225 Difference]: With dead ends: 421 [2023-11-29 05:49:01,245 INFO L226 Difference]: Without dead ends: 419 [2023-11-29 05:49:01,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1006 GetRequests, 736 SyntacticMatches, 131 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9689 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=7319, Invalid=12421, Unknown=0, NotChecked=0, Total=19740 [2023-11-29 05:49:01,247 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 82 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:01,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 691 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:49:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-11-29 05:49:01,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 412. [2023-11-29 05:49:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.0097323600973236) internal successors, (415), 411 states have internal predecessors, (415), 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) [2023-11-29 05:49:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 415 transitions. [2023-11-29 05:49:01,289 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 415 transitions. Word has length 403 [2023-11-29 05:49:01,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:01,289 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 415 transitions. [2023-11-29 05:49:01,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 5.835616438356165) internal successors, (426), 72 states have internal predecessors, (426), 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) [2023-11-29 05:49:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 415 transitions. [2023-11-29 05:49:01,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2023-11-29 05:49:01,291 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:01,291 INFO L195 NwaCegarLoop]: trace histogram [68, 67, 67, 67, 67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:01,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2023-11-29 05:49:01,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:01,492 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:01,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:01,492 INFO L85 PathProgramCache]: Analyzing trace with hash -786919907, now seen corresponding path program 79 times [2023-11-29 05:49:01,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:01,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090981200] [2023-11-29 05:49:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:01,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 13400 backedges. 8780 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:11,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:11,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090981200] [2023-11-29 05:49:11,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090981200] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:49:11,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394401438] [2023-11-29 05:49:11,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:49:11,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:11,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:11,236 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:11,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-11-29 05:49:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:11,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 1509 conjuncts, 136 conjunts are in the unsatisfiable core [2023-11-29 05:49:11,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13400 backedges. 8976 proven. 4422 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:49:18,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:49:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13400 backedges. 8976 proven. 4422 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:49:24,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394401438] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:49:24,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:49:24,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 136, 136] total 206 [2023-11-29 05:49:24,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842447423] [2023-11-29 05:49:24,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:49:24,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2023-11-29 05:49:24,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:24,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2023-11-29 05:49:24,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9456, Invalid=32774, Unknown=0, NotChecked=0, Total=42230 [2023-11-29 05:49:24,145 INFO L87 Difference]: Start difference. First operand 412 states and 415 transitions. Second operand has 206 states, 206 states have (on average 3.3349514563106797) internal successors, (687), 206 states have internal predecessors, (687), 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) [2023-11-29 05:49:30,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:30,449 INFO L93 Difference]: Finished difference Result 955 states and 1093 transitions. [2023-11-29 05:49:30,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2023-11-29 05:49:30,450 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 3.3349514563106797) internal successors, (687), 206 states have internal predecessors, (687), 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 411 [2023-11-29 05:49:30,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:30,452 INFO L225 Difference]: With dead ends: 955 [2023-11-29 05:49:30,452 INFO L226 Difference]: Without dead ends: 682 [2023-11-29 05:49:30,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1024 GetRequests, 621 SyntacticMatches, 132 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27847 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=18570, Invalid=55686, Unknown=0, NotChecked=0, Total=74256 [2023-11-29 05:49:30,456 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 974 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 1883 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 1883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:30,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 1682 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 1883 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 05:49:30,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2023-11-29 05:49:30,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 414. [2023-11-29 05:49:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.0096852300242132) internal successors, (417), 413 states have internal predecessors, (417), 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) [2023-11-29 05:49:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 417 transitions. [2023-11-29 05:49:30,502 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 417 transitions. Word has length 411 [2023-11-29 05:49:30,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:30,502 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 417 transitions. [2023-11-29 05:49:30,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 3.3349514563106797) internal successors, (687), 206 states have internal predecessors, (687), 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) [2023-11-29 05:49:30,502 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 417 transitions. [2023-11-29 05:49:30,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2023-11-29 05:49:30,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:30,505 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:30,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2023-11-29 05:49:30,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:30,706 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:30,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:30,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1691470654, now seen corresponding path program 80 times [2023-11-29 05:49:30,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:30,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995942102] [2023-11-29 05:49:30,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:30,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13534 backedges. 8780 proven. 4754 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:41,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:41,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995942102] [2023-11-29 05:49:41,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995942102] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:49:41,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219732198] [2023-11-29 05:49:41,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:49:41,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:41,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:41,056 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:41,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-11-29 05:49:41,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:49:41,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:49:41,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 1519 conjuncts, 138 conjunts are in the unsatisfiable core [2023-11-29 05:49:41,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13534 backedges. 8978 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:48,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:49:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13534 backedges. 8978 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:54,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219732198] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:49:54,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:49:54,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138, 138] total 208 [2023-11-29 05:49:54,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570965984] [2023-11-29 05:49:54,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:49:54,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 208 states [2023-11-29 05:49:54,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:54,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2023-11-29 05:49:54,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9663, Invalid=33393, Unknown=0, NotChecked=0, Total=43056 [2023-11-29 05:49:54,574 INFO L87 Difference]: Start difference. First operand 414 states and 417 transitions. Second operand has 208 states, 208 states have (on average 3.3125) internal successors, (689), 208 states have internal predecessors, (689), 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) [2023-11-29 05:50:01,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:50:01,396 INFO L93 Difference]: Finished difference Result 963 states and 1103 transitions. [2023-11-29 05:50:01,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2023-11-29 05:50:01,397 INFO L78 Accepts]: Start accepts. Automaton has has 208 states, 208 states have (on average 3.3125) internal successors, (689), 208 states have internal predecessors, (689), 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 413 [2023-11-29 05:50:01,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:50:01,401 INFO L225 Difference]: With dead ends: 963 [2023-11-29 05:50:01,401 INFO L226 Difference]: Without dead ends: 688 [2023-11-29 05:50:01,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1030 GetRequests, 622 SyntacticMatches, 134 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28400 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=19049, Invalid=56851, Unknown=0, NotChecked=0, Total=75900 [2023-11-29 05:50:01,407 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 1100 mSDsluCounter, 1713 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 1852 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:50:01,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1100 Valid, 1852 Invalid, 2351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 2058 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 05:50:01,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2023-11-29 05:50:01,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 416. [2023-11-29 05:50:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.0096385542168675) internal successors, (419), 415 states have internal predecessors, (419), 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) [2023-11-29 05:50:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 419 transitions. [2023-11-29 05:50:01,462 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 419 transitions. Word has length 413 [2023-11-29 05:50:01,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:50:01,462 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 419 transitions. [2023-11-29 05:50:01,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 208 states, 208 states have (on average 3.3125) internal successors, (689), 208 states have internal predecessors, (689), 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) [2023-11-29 05:50:01,462 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 419 transitions. [2023-11-29 05:50:01,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2023-11-29 05:50:01,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:50:01,464 INFO L195 NwaCegarLoop]: trace histogram [69, 68, 68, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:50:01,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2023-11-29 05:50:01,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:01,665 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:50:01,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:50:01,665 INFO L85 PathProgramCache]: Analyzing trace with hash 913622567, now seen corresponding path program 81 times [2023-11-29 05:50:01,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:50:01,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971058290] [2023-11-29 05:50:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:01,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:50:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:50:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13670 backedges. 4556 proven. 9114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:50:09,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:50:09,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971058290] [2023-11-29 05:50:09,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971058290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:50:09,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068441936] [2023-11-29 05:50:09,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:50:09,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:09,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:50:09,309 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:50:09,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-11-29 05:50:09,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2023-11-29 05:50:09,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:50:10,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 1529 conjuncts, 142 conjunts are in the unsatisfiable core [2023-11-29 05:50:10,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:50:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 13670 backedges. 4692 proven. 8978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:50:10,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:50:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13670 backedges. 4692 proven. 8978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:50:14,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068441936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:50:14,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:50:14,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 74 [2023-11-29 05:50:14,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664607346] [2023-11-29 05:50:14,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:50:14,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-11-29 05:50:14,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:50:14,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-11-29 05:50:14,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2565, Invalid=2985, Unknown=0, NotChecked=0, Total=5550 [2023-11-29 05:50:14,271 INFO L87 Difference]: Start difference. First operand 416 states and 419 transitions. Second operand has 75 states, 75 states have (on average 5.84) internal successors, (438), 74 states have internal predecessors, (438), 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) [2023-11-29 05:50:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:50:16,198 INFO L93 Difference]: Finished difference Result 433 states and 437 transitions. [2023-11-29 05:50:16,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2023-11-29 05:50:16,198 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 5.84) internal successors, (438), 74 states have internal predecessors, (438), 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 415 [2023-11-29 05:50:16,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:50:16,201 INFO L225 Difference]: With dead ends: 433 [2023-11-29 05:50:16,201 INFO L226 Difference]: Without dead ends: 431 [2023-11-29 05:50:16,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 758 SyntacticMatches, 135 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10255 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=7744, Invalid=13136, Unknown=0, NotChecked=0, Total=20880 [2023-11-29 05:50:16,203 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 82 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:50:16,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 663 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:50:16,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2023-11-29 05:50:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 424. [2023-11-29 05:50:16,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.0094562647754137) internal successors, (427), 423 states have internal predecessors, (427), 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) [2023-11-29 05:50:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 427 transitions. [2023-11-29 05:50:16,252 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 427 transitions. Word has length 415 [2023-11-29 05:50:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:50:16,252 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 427 transitions. [2023-11-29 05:50:16,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 5.84) internal successors, (438), 74 states have internal predecessors, (438), 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) [2023-11-29 05:50:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 427 transitions. [2023-11-29 05:50:16,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2023-11-29 05:50:16,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:50:16,255 INFO L195 NwaCegarLoop]: trace histogram [70, 69, 69, 69, 69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:50:16,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2023-11-29 05:50:16,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:16,455 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:50:16,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:50:16,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1333264115, now seen corresponding path program 82 times [2023-11-29 05:50:16,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:50:16,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654153680] [2023-11-29 05:50:16,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:16,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:50:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:50:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14214 backedges. 9318 proven. 4896 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:50:27,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:50:27,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654153680] [2023-11-29 05:50:27,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654153680] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:50:27,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874801410] [2023-11-29 05:50:27,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:50:27,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:27,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:50:27,289 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:50:27,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-11-29 05:50:27,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:50:27,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:50:27,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 1553 conjuncts, 141 conjunts are in the unsatisfiable core [2023-11-29 05:50:27,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:50:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14214 backedges. 9522 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:50:34,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:50:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 14214 backedges. 9522 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:50:40,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874801410] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:50:40,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:50:40,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141, 141] total 215 [2023-11-29 05:50:40,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215943754] [2023-11-29 05:50:40,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:50:40,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 215 states [2023-11-29 05:50:40,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:50:40,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 215 interpolants. [2023-11-29 05:50:40,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10370, Invalid=35640, Unknown=0, NotChecked=0, Total=46010 [2023-11-29 05:50:40,688 INFO L87 Difference]: Start difference. First operand 424 states and 427 transitions. Second operand has 215 states, 215 states have (on average 3.3302325581395347) internal successors, (716), 215 states have internal predecessors, (716), 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) [2023-11-29 05:50:51,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:50:51,569 INFO L93 Difference]: Finished difference Result 1266 states and 1411 transitions. [2023-11-29 05:50:51,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2023-11-29 05:50:51,569 INFO L78 Accepts]: Start accepts. Automaton has has 215 states, 215 states have (on average 3.3302325581395347) internal successors, (716), 215 states have internal predecessors, (716), 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 423 [2023-11-29 05:50:51,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:50:51,572 INFO L225 Difference]: With dead ends: 1266 [2023-11-29 05:50:51,572 INFO L226 Difference]: Without dead ends: 708 [2023-11-29 05:50:51,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1124 GetRequests, 637 SyntacticMatches, 135 SemanticMatches, 352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42139 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=30179, Invalid=94783, Unknown=0, NotChecked=0, Total=124962 [2023-11-29 05:50:51,580 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 1487 mSDsluCounter, 2143 mSDsCounter, 0 mSdLazyCounter, 2510 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 2284 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 2510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:50:51,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1487 Valid, 2284 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 2510 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 05:50:51,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2023-11-29 05:50:51,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 428. [2023-11-29 05:50:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.009367681498829) internal successors, (431), 427 states have internal predecessors, (431), 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) [2023-11-29 05:50:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 431 transitions. [2023-11-29 05:50:51,634 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 431 transitions. Word has length 423 [2023-11-29 05:50:51,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:50:51,635 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 431 transitions. [2023-11-29 05:50:51,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 215 states, 215 states have (on average 3.3302325581395347) internal successors, (716), 215 states have internal predecessors, (716), 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) [2023-11-29 05:50:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 431 transitions. [2023-11-29 05:50:51,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2023-11-29 05:50:51,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:50:51,637 INFO L195 NwaCegarLoop]: trace histogram [71, 70, 70, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:50:51,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2023-11-29 05:50:51,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:51,838 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:50:51,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:50:51,838 INFO L85 PathProgramCache]: Analyzing trace with hash -428967401, now seen corresponding path program 83 times [2023-11-29 05:50:51,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:50:51,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013182749] [2023-11-29 05:50:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:51,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:50:52,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:50:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 14492 backedges. 4830 proven. 9662 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:50:59,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:50:59,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013182749] [2023-11-29 05:50:59,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013182749] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:50:59,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958554981] [2023-11-29 05:50:59,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:50:59,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:59,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:50:59,059 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:50:59,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-11-29 05:50:59,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 71 check-sat command(s) [2023-11-29 05:50:59,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:50:59,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 1573 conjuncts, 146 conjunts are in the unsatisfiable core [2023-11-29 05:50:59,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:51:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 14492 backedges. 4970 proven. 9522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:51:00,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:51:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 14492 backedges. 4970 proven. 9522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:51:03,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958554981] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:51:03,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:51:03,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 76 [2023-11-29 05:51:03,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782568067] [2023-11-29 05:51:03,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:51:03,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-11-29 05:51:03,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:51:03,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-11-29 05:51:03,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2710, Invalid=3142, Unknown=0, NotChecked=0, Total=5852 [2023-11-29 05:51:03,604 INFO L87 Difference]: Start difference. First operand 428 states and 431 transitions. Second operand has 77 states, 77 states have (on average 5.8441558441558445) internal successors, (450), 76 states have internal predecessors, (450), 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) [2023-11-29 05:51:05,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:51:05,539 INFO L93 Difference]: Finished difference Result 445 states and 449 transitions. [2023-11-29 05:51:05,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2023-11-29 05:51:05,539 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 5.8441558441558445) internal successors, (450), 76 states have internal predecessors, (450), 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 427 [2023-11-29 05:51:05,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:51:05,542 INFO L225 Difference]: With dead ends: 445 [2023-11-29 05:51:05,542 INFO L226 Difference]: Without dead ends: 443 [2023-11-29 05:51:05,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1066 GetRequests, 780 SyntacticMatches, 139 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10837 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=8181, Invalid=13871, Unknown=0, NotChecked=0, Total=22052 [2023-11-29 05:51:05,545 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 80 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:51:05,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 691 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:51:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-11-29 05:51:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 436. [2023-11-29 05:51:05,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.0091954022988505) internal successors, (439), 435 states have internal predecessors, (439), 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) [2023-11-29 05:51:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 439 transitions. [2023-11-29 05:51:05,598 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 439 transitions. Word has length 427 [2023-11-29 05:51:05,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:51:05,598 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 439 transitions. [2023-11-29 05:51:05,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 5.8441558441558445) internal successors, (450), 76 states have internal predecessors, (450), 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) [2023-11-29 05:51:05,598 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 439 transitions. [2023-11-29 05:51:05,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2023-11-29 05:51:05,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:51:05,600 INFO L195 NwaCegarLoop]: trace histogram [72, 71, 71, 71, 71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:51:05,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2023-11-29 05:51:05,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:51:05,801 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:51:05,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:51:05,801 INFO L85 PathProgramCache]: Analyzing trace with hash 826721533, now seen corresponding path program 84 times [2023-11-29 05:51:05,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:51:05,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051556267] [2023-11-29 05:51:05,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:51:05,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:51:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:51:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 15052 backedges. 9872 proven. 5180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:51:17,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:51:17,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051556267] [2023-11-29 05:51:17,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051556267] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:51:17,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526354495] [2023-11-29 05:51:17,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:51:17,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:51:17,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:51:17,806 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:51:17,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-11-29 05:51:18,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 72 check-sat command(s) [2023-11-29 05:51:18,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:51:18,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 145 conjunts are in the unsatisfiable core [2023-11-29 05:51:18,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:51:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15052 backedges. 10082 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:51:25,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:51:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 15052 backedges. 10082 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:51:32,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526354495] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:51:32,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:51:32,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145, 145] total 221 [2023-11-29 05:51:32,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753964588] [2023-11-29 05:51:32,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:51:32,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 221 states [2023-11-29 05:51:32,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:51:32,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 221 interpolants. [2023-11-29 05:51:32,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10954, Invalid=37666, Unknown=0, NotChecked=0, Total=48620 [2023-11-29 05:51:32,182 INFO L87 Difference]: Start difference. First operand 436 states and 439 transitions. Second operand has 221 states, 221 states have (on average 3.330316742081448) internal successors, (736), 221 states have internal predecessors, (736), 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) [2023-11-29 05:51:43,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:51:43,908 INFO L93 Difference]: Finished difference Result 1302 states and 1451 transitions. [2023-11-29 05:51:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2023-11-29 05:51:43,908 INFO L78 Accepts]: Start accepts. Automaton has has 221 states, 221 states have (on average 3.330316742081448) internal successors, (736), 221 states have internal predecessors, (736), 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 435 [2023-11-29 05:51:43,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:51:43,913 INFO L225 Difference]: With dead ends: 1302 [2023-11-29 05:51:43,913 INFO L226 Difference]: Without dead ends: 728 [2023-11-29 05:51:43,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1156 GetRequests, 655 SyntacticMatches, 139 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44568 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=31905, Invalid=100227, Unknown=0, NotChecked=0, Total=132132 [2023-11-29 05:51:43,921 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 1368 mSDsluCounter, 2885 mSDsCounter, 0 mSdLazyCounter, 3268 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1368 SdHoareTripleChecker+Valid, 3030 SdHoareTripleChecker+Invalid, 3647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 3268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:51:43,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1368 Valid, 3030 Invalid, 3647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 3268 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 05:51:43,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2023-11-29 05:51:43,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 440. [2023-11-29 05:51:43,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.0091116173120729) internal successors, (443), 439 states have internal predecessors, (443), 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) [2023-11-29 05:51:43,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 443 transitions. [2023-11-29 05:51:43,977 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 443 transitions. Word has length 435 [2023-11-29 05:51:43,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:51:43,977 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 443 transitions. [2023-11-29 05:51:43,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 221 states, 221 states have (on average 3.330316742081448) internal successors, (736), 221 states have internal predecessors, (736), 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) [2023-11-29 05:51:43,978 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 443 transitions. [2023-11-29 05:51:43,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-11-29 05:51:43,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:51:43,980 INFO L195 NwaCegarLoop]: trace histogram [73, 72, 72, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:51:43,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2023-11-29 05:51:44,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:51:44,180 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:51:44,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:51:44,181 INFO L85 PathProgramCache]: Analyzing trace with hash -44171513, now seen corresponding path program 85 times [2023-11-29 05:51:44,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:51:44,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176745813] [2023-11-29 05:51:44,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:51:44,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:51:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:51:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 15338 backedges. 5112 proven. 10226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:51:51,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:51:51,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176745813] [2023-11-29 05:51:51,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176745813] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:51:51,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655029689] [2023-11-29 05:51:51,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:51:51,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:51:51,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:51:51,738 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:51:51,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67fcb23-f8c1-4758-9dce-93e130e552dd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-11-29 05:51:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:51:52,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 1617 conjuncts, 150 conjunts are in the unsatisfiable core [2023-11-29 05:51:52,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:51:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 15338 backedges. 5256 proven. 10082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:51:52,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:51:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 15338 backedges. 5256 proven. 10082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:51:56,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655029689] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:51:56,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:51:56,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 78 [2023-11-29 05:51:56,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419929110] [2023-11-29 05:51:56,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:51:56,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-11-29 05:51:56,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:51:56,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-11-29 05:51:56,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2859, Invalid=3303, Unknown=0, NotChecked=0, Total=6162 [2023-11-29 05:51:56,308 INFO L87 Difference]: Start difference. First operand 440 states and 443 transitions. Second operand has 79 states, 79 states have (on average 5.848101265822785) internal successors, (462), 78 states have internal predecessors, (462), 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)