./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/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_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/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_21d34dce-fe7d-413b-9825-9eef541e359f/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 3d0f32d2f39934bb8fd732fa206acfa5d2fb4cacaee37919c0e4326d55891c86 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:46:28,870 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:46:28,938 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:46:28,942 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:46:28,943 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:46:28,970 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:46:28,970 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:46:28,971 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:46:28,972 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:46:28,972 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:46:28,973 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:46:28,973 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:46:28,974 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:46:28,975 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:46:28,975 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:46:28,976 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:46:28,976 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:46:28,977 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:46:28,977 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:46:28,978 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:46:28,978 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:46:28,979 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:46:28,979 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:46:28,980 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:46:28,980 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:46:28,981 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:46:28,981 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:46:28,981 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:46:28,982 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:46:28,982 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:46:28,982 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:46:28,983 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:46:28,983 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:46:28,984 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:46:28,984 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:46:28,984 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:46:28,984 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:46:28,984 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:46:28,985 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:46:28,985 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:46:28,985 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:46:28,985 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:46:28,986 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_21d34dce-fe7d-413b-9825-9eef541e359f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d0f32d2f39934bb8fd732fa206acfa5d2fb4cacaee37919c0e4326d55891c86 [2023-11-29 04:46:29,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:46:29,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:46:29,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:46:29,253 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:46:29,253 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:46:29,255 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/loop-simple/nested_5.c [2023-11-29 04:46:32,030 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:46:32,178 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:46:32,179 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/sv-benchmarks/c/loop-simple/nested_5.c [2023-11-29 04:46:32,185 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/data/0b9c28c14/77e84fd239b24fb0a88489d18a1b3e03/FLAG85035bc8d [2023-11-29 04:46:32,199 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/data/0b9c28c14/77e84fd239b24fb0a88489d18a1b3e03 [2023-11-29 04:46:32,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:46:32,203 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:46:32,204 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:46:32,204 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:46:32,209 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:46:32,209 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:46:32" (1/1) ... [2023-11-29 04:46:32,210 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25808a21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:32, skipping insertion in model container [2023-11-29 04:46:32,210 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:46:32" (1/1) ... [2023-11-29 04:46:32,226 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:46:32,364 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_21d34dce-fe7d-413b-9825-9eef541e359f/sv-benchmarks/c/loop-simple/nested_5.c[899,912] [2023-11-29 04:46:32,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:46:32,380 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:46:32,396 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_21d34dce-fe7d-413b-9825-9eef541e359f/sv-benchmarks/c/loop-simple/nested_5.c[899,912] [2023-11-29 04:46:32,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:46:32,410 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:46:32,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:32 WrapperNode [2023-11-29 04:46:32,411 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:46:32,411 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:46:32,412 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:46:32,412 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:46:32,419 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:32" (1/1) ... [2023-11-29 04:46:32,425 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:32" (1/1) ... [2023-11-29 04:46:32,439 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 58 [2023-11-29 04:46:32,440 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:46:32,441 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:46:32,441 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:46:32,441 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:46:32,451 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:32" (1/1) ... [2023-11-29 04:46:32,451 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:32" (1/1) ... [2023-11-29 04:46:32,452 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:32" (1/1) ... [2023-11-29 04:46:32,465 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 04:46:32,465 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:32" (1/1) ... [2023-11-29 04:46:32,466 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:32" (1/1) ... [2023-11-29 04:46:32,468 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:32" (1/1) ... [2023-11-29 04:46:32,473 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:32" (1/1) ... [2023-11-29 04:46:32,474 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:32" (1/1) ... [2023-11-29 04:46:32,475 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:32" (1/1) ... [2023-11-29 04:46:32,476 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:46:32,477 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:46:32,478 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:46:32,478 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:46:32,479 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:32" (1/1) ... [2023-11-29 04:46:32,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:46:32,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:46:32,507 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:46:32,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:46:32,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:46:32,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:46:32,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:46:32,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:46:32,597 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:46:32,599 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:46:32,707 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:46:32,732 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:46:32,732 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-29 04:46:32,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:46:32 BoogieIcfgContainer [2023-11-29 04:46:32,733 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:46:32,736 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:46:32,736 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:46:32,740 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:46:32,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:46:32" (1/3) ... [2023-11-29 04:46:32,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@604a7112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:46:32, skipping insertion in model container [2023-11-29 04:46:32,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:46:32" (2/3) ... [2023-11-29 04:46:32,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@604a7112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:46:32, skipping insertion in model container [2023-11-29 04:46:32,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:46:32" (3/3) ... [2023-11-29 04:46:32,743 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_5.c [2023-11-29 04:46:32,763 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:46:32,763 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:46:32,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:46:32,815 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;@6e6f287, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:46:32,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 04:46:32,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:32,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-29 04:46:32,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:32,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-29 04:46:32,827 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:32,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:32,833 INFO L85 PathProgramCache]: Analyzing trace with hash 3257020, now seen corresponding path program 1 times [2023-11-29 04:46:32,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:32,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667202028] [2023-11-29 04:46:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:32,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:33,026 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 04:46:33,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:33,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667202028] [2023-11-29 04:46:33,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667202028] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:46:33,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:46:33,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:46:33,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516788791] [2023-11-29 04:46:33,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:46:33,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:46:33,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:33,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:46:33,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:46:33,070 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:33,111 INFO L93 Difference]: Finished difference Result 38 states and 68 transitions. [2023-11-29 04:46:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:46:33,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2023-11-29 04:46:33,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:33,122 INFO L225 Difference]: With dead ends: 38 [2023-11-29 04:46:33,122 INFO L226 Difference]: Without dead ends: 22 [2023-11-29 04:46:33,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:46:33,129 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:33,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 25 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:46:33,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-29 04:46:33,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2023-11-29 04:46:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:33,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2023-11-29 04:46:33,163 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 4 [2023-11-29 04:46:33,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:33,163 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2023-11-29 04:46:33,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:33,164 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2023-11-29 04:46:33,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 04:46:33,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:33,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:46:33,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:46:33,165 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:33,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:33,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1743481472, now seen corresponding path program 1 times [2023-11-29 04:46:33,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:33,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125654120] [2023-11-29 04:46:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:33,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:46:33,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:33,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125654120] [2023-11-29 04:46:33,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125654120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:46:33,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:46:33,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:46:33,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180531187] [2023-11-29 04:46:33,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:46:33,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:46:33,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:33,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:46:33,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:46:33,228 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:33,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:33,250 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2023-11-29 04:46:33,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:46:33,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-11-29 04:46:33,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:33,251 INFO L225 Difference]: With dead ends: 33 [2023-11-29 04:46:33,252 INFO L226 Difference]: Without dead ends: 21 [2023-11-29 04:46:33,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:46:33,254 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:33,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:46:33,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-29 04:46:33,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2023-11-29 04:46:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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 04:46:33,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2023-11-29 04:46:33,259 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 7 [2023-11-29 04:46:33,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:33,260 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2023-11-29 04:46:33,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:33,260 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2023-11-29 04:46:33,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 04:46:33,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:33,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:46:33,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 04:46:33,261 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:33,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:33,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1911061864, now seen corresponding path program 1 times [2023-11-29 04:46:33,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:33,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856639816] [2023-11-29 04:46:33,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:33,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:33,313 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 04:46:33,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:33,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856639816] [2023-11-29 04:46:33,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856639816] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:46:33,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:46:33,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:46:33,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734211839] [2023-11-29 04:46:33,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:46:33,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:46:33,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:33,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:46:33,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:46:33,317 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:33,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:33,336 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2023-11-29 04:46:33,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:46:33,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-11-29 04:46:33,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:33,337 INFO L225 Difference]: With dead ends: 33 [2023-11-29 04:46:33,337 INFO L226 Difference]: Without dead ends: 20 [2023-11-29 04:46:33,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:46:33,339 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:33,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:46:33,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-29 04:46:33,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2023-11-29 04:46:33,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:33,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-29 04:46:33,345 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2023-11-29 04:46:33,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:33,345 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-29 04:46:33,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:33,345 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-29 04:46:33,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 04:46:33,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:33,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:46:33,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 04:46:33,347 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:33,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:33,347 INFO L85 PathProgramCache]: Analyzing trace with hash 447814724, now seen corresponding path program 1 times [2023-11-29 04:46:33,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:33,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384401246] [2023-11-29 04:46:33,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:33,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:46:33,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:33,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384401246] [2023-11-29 04:46:33,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384401246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:46:33,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:46:33,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:46:33,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856183036] [2023-11-29 04:46:33,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:46:33,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:46:33,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:33,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:46:33,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:46:33,404 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:33,422 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-11-29 04:46:33,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:46:33,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2023-11-29 04:46:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:33,423 INFO L225 Difference]: With dead ends: 33 [2023-11-29 04:46:33,423 INFO L226 Difference]: Without dead ends: 19 [2023-11-29 04:46:33,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:46:33,425 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:33,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:46:33,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-29 04:46:33,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2023-11-29 04:46:33,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 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 04:46:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-29 04:46:33,431 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 13 [2023-11-29 04:46:33,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:33,431 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-29 04:46:33,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:33,432 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-29 04:46:33,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 04:46:33,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:33,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:46:33,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 04:46:33,433 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:33,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:33,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1206230460, now seen corresponding path program 1 times [2023-11-29 04:46:33,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:33,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114045277] [2023-11-29 04:46:33,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:33,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:46:33,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:33,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114045277] [2023-11-29 04:46:33,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114045277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:46:33,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:46:33,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:46:33,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304375847] [2023-11-29 04:46:33,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:46:33,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:46:33,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:33,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:46:33,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:46:33,488 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:33,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:33,500 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2023-11-29 04:46:33,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:46:33,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2023-11-29 04:46:33,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:33,501 INFO L225 Difference]: With dead ends: 33 [2023-11-29 04:46:33,502 INFO L226 Difference]: Without dead ends: 18 [2023-11-29 04:46:33,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:46:33,503 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:33,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:46:33,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-29 04:46:33,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-29 04:46:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-29 04:46:33,509 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 16 [2023-11-29 04:46:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:33,509 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-29 04:46:33,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:33,510 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-29 04:46:33,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 04:46:33,510 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:33,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:46:33,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 04:46:33,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:33,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:33,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1779175442, now seen corresponding path program 1 times [2023-11-29 04:46:33,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:33,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994010282] [2023-11-29 04:46:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:33,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:46:33,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:33,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994010282] [2023-11-29 04:46:33,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994010282] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:46:33,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213956767] [2023-11-29 04:46:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:33,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:33,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:46:33,574 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:46:33,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:46:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:33,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 04:46:33,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:46:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:46:33,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:46:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:46:33,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213956767] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:46:33,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:46:33,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-29 04:46:33,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929094593] [2023-11-29 04:46:33,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:46:33,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:46:33,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:33,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:46:33,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:46:33,699 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:33,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:33,723 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2023-11-29 04:46:33,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:46:33,724 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 04:46:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:33,724 INFO L225 Difference]: With dead ends: 37 [2023-11-29 04:46:33,724 INFO L226 Difference]: Without dead ends: 21 [2023-11-29 04:46:33,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:46:33,726 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:33,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:46:33,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-29 04:46:33,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-29 04:46:33,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:33,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-29 04:46:33,731 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 17 [2023-11-29 04:46:33,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:33,731 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-29 04:46:33,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:33,732 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-29 04:46:33,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 04:46:33,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:33,732 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:46:33,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:46:33,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 04:46:33,933 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:33,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:33,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2113824196, now seen corresponding path program 2 times [2023-11-29 04:46:33,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:33,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832076529] [2023-11-29 04:46:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:33,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:46:33,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:33,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832076529] [2023-11-29 04:46:33,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832076529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:46:33,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199124495] [2023-11-29 04:46:33,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:46:33,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:33,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:46:33,985 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:46:33,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:46:34,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:46:34,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:46:34,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:46:34,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:46:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:46:34,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:46:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:46:34,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199124495] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:46:34,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:46:34,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2023-11-29 04:46:34,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943864023] [2023-11-29 04:46:34,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:46:34,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 04:46:34,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:34,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 04:46:34,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 04:46:34,142 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:34,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:34,285 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2023-11-29 04:46:34,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 04:46:34,287 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 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 20 [2023-11-29 04:46:34,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:34,287 INFO L225 Difference]: With dead ends: 59 [2023-11-29 04:46:34,288 INFO L226 Difference]: Without dead ends: 40 [2023-11-29 04:46:34,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2023-11-29 04:46:34,289 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:34,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 57 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:46:34,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-29 04:46:34,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-11-29 04:46:34,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:34,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-11-29 04:46:34,297 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 20 [2023-11-29 04:46:34,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:34,297 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-11-29 04:46:34,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:34,297 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-11-29 04:46:34,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 04:46:34,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:34,298 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:46:34,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:46:34,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 04:46:34,501 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:34,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:34,501 INFO L85 PathProgramCache]: Analyzing trace with hash -645610428, now seen corresponding path program 3 times [2023-11-29 04:46:34,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:34,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090353154] [2023-11-29 04:46:34,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:34,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-29 04:46:34,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:34,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090353154] [2023-11-29 04:46:34,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090353154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:46:34,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560102535] [2023-11-29 04:46:34,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:46:34,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:34,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:46:34,565 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:46:34,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:46:34,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:46:34,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:46:34,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 04:46:34,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:46:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-29 04:46:34,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:46:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-29 04:46:34,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560102535] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:46:34,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:46:34,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-11-29 04:46:34,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480689070] [2023-11-29 04:46:34,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:46:34,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:46:34,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:34,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:46:34,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:46:34,745 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 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 04:46:34,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:34,901 INFO L93 Difference]: Finished difference Result 307 states and 363 transitions. [2023-11-29 04:46:34,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 04:46:34,902 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 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) Word has length 31 [2023-11-29 04:46:34,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:34,904 INFO L225 Difference]: With dead ends: 307 [2023-11-29 04:46:34,905 INFO L226 Difference]: Without dead ends: 277 [2023-11-29 04:46:34,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:46:34,906 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:34,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 52 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:46:34,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-11-29 04:46:34,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 197. [2023-11-29 04:46:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.1683673469387754) internal successors, (229), 196 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 229 transitions. [2023-11-29 04:46:34,954 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 229 transitions. Word has length 31 [2023-11-29 04:46:34,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:34,955 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 229 transitions. [2023-11-29 04:46:34,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 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 04:46:34,955 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 229 transitions. [2023-11-29 04:46:34,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-11-29 04:46:34,961 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:34,961 INFO L195 NwaCegarLoop]: trace histogram [96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-29 04:46:34,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:46:35,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:35,162 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:35,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:35,163 INFO L85 PathProgramCache]: Analyzing trace with hash 659829612, now seen corresponding path program 4 times [2023-11-29 04:46:35,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:35,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269037665] [2023-11-29 04:46:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:35,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6756 backedges. 2566 proven. 1 refuted. 0 times theorem prover too weak. 4189 trivial. 0 not checked. [2023-11-29 04:46:35,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:35,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269037665] [2023-11-29 04:46:35,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269037665] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:46:35,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962907706] [2023-11-29 04:46:35,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 04:46:35,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:35,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:46:35,386 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:46:35,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:46:35,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 04:46:35,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:46:35,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 04:46:35,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:46:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6756 backedges. 1485 proven. 53 refuted. 0 times theorem prover too weak. 5218 trivial. 0 not checked. [2023-11-29 04:46:35,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:46:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6756 backedges. 1485 proven. 53 refuted. 0 times theorem prover too weak. 5218 trivial. 0 not checked. [2023-11-29 04:46:35,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962907706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:46:35,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:46:35,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2023-11-29 04:46:35,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137854227] [2023-11-29 04:46:35,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:46:35,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 04:46:35,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:35,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 04:46:35,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 04:46:35,644 INFO L87 Difference]: Start difference. First operand 197 states and 229 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:36,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:36,024 INFO L93 Difference]: Finished difference Result 1611 states and 1927 transitions. [2023-11-29 04:46:36,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 04:46:36,024 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 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 196 [2023-11-29 04:46:36,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:36,031 INFO L225 Difference]: With dead ends: 1611 [2023-11-29 04:46:36,031 INFO L226 Difference]: Without dead ends: 1417 [2023-11-29 04:46:36,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2023-11-29 04:46:36,035 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:36,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 46 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:46:36,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2023-11-29 04:46:36,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 953. [2023-11-29 04:46:36,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 1.1313025210084033) internal successors, (1077), 952 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:36,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1077 transitions. [2023-11-29 04:46:36,261 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1077 transitions. Word has length 196 [2023-11-29 04:46:36,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:36,262 INFO L495 AbstractCegarLoop]: Abstraction has 953 states and 1077 transitions. [2023-11-29 04:46:36,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:36,262 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1077 transitions. [2023-11-29 04:46:36,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 953 [2023-11-29 04:46:36,283 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:36,284 INFO L195 NwaCegarLoop]: trace histogram [576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1] [2023-11-29 04:46:36,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 04:46:36,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:36,485 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:36,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:36,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1491595196, now seen corresponding path program 5 times [2023-11-29 04:46:36,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:36,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510259051] [2023-11-29 04:46:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:36,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 236738 backedges. 51878 proven. 1853 refuted. 0 times theorem prover too weak. 183007 trivial. 0 not checked. [2023-11-29 04:46:37,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:37,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510259051] [2023-11-29 04:46:37,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510259051] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:46:37,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354218338] [2023-11-29 04:46:37,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 04:46:37,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:37,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:46:37,493 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:46:37,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:46:37,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2023-11-29 04:46:37,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:46:37,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 04:46:37,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:46:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 236738 backedges. 126006 proven. 1853 refuted. 0 times theorem prover too weak. 108879 trivial. 0 not checked. [2023-11-29 04:46:38,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:46:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 236738 backedges. 126006 proven. 1853 refuted. 0 times theorem prover too weak. 108879 trivial. 0 not checked. [2023-11-29 04:46:38,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354218338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:46:38,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:46:38,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-29 04:46:38,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457742437] [2023-11-29 04:46:38,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:46:38,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 04:46:38,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:38,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 04:46:38,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:46:38,242 INFO L87 Difference]: Start difference. First operand 953 states and 1077 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:38,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:38,648 INFO L93 Difference]: Finished difference Result 3612 states and 4101 transitions. [2023-11-29 04:46:38,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:46:38,649 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 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 952 [2023-11-29 04:46:38,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:38,665 INFO L225 Difference]: With dead ends: 3612 [2023-11-29 04:46:38,665 INFO L226 Difference]: Without dead ends: 2777 [2023-11-29 04:46:38,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1907 GetRequests, 1900 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:46:38,668 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:38,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 55 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:46:38,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2023-11-29 04:46:38,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 2777. [2023-11-29 04:46:38,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2777 states, 2776 states have (on average 1.1257204610951008) internal successors, (3125), 2776 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:38,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 3125 transitions. [2023-11-29 04:46:38,996 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 3125 transitions. Word has length 952 [2023-11-29 04:46:38,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:38,997 INFO L495 AbstractCegarLoop]: Abstraction has 2777 states and 3125 transitions. [2023-11-29 04:46:38,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:38,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 3125 transitions. [2023-11-29 04:46:39,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2777 [2023-11-29 04:46:39,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:39,197 INFO L195 NwaCegarLoop]: trace histogram [1728, 288, 288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1] [2023-11-29 04:46:39,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:46:39,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 04:46:39,401 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:39,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:39,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1152366524, now seen corresponding path program 6 times [2023-11-29 04:46:39,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:39,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666170394] [2023-11-29 04:46:39,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:39,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:46:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:46:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2131506 backedges. 799831 proven. 66653 refuted. 0 times theorem prover too weak. 1265022 trivial. 0 not checked. [2023-11-29 04:46:44,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:46:44,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666170394] [2023-11-29 04:46:44,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666170394] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:46:44,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952432376] [2023-11-29 04:46:44,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 04:46:44,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:44,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:46:44,034 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:46:44,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:46:48,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 465 check-sat command(s) [2023-11-29 04:46:48,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:46:48,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 5404 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 04:46:48,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:46:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2131506 backedges. 799834 proven. 66653 refuted. 0 times theorem prover too weak. 1265019 trivial. 0 not checked. [2023-11-29 04:46:49,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:46:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2131506 backedges. 799834 proven. 66653 refuted. 0 times theorem prover too weak. 1265019 trivial. 0 not checked. [2023-11-29 04:46:49,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952432376] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:46:49,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:46:49,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-29 04:46:49,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897380779] [2023-11-29 04:46:49,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:46:49,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 04:46:49,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:46:49,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 04:46:49,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:46:49,808 INFO L87 Difference]: Start difference. First operand 2777 states and 3125 transitions. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:46:50,841 INFO L93 Difference]: Finished difference Result 10381 states and 11694 transitions. [2023-11-29 04:46:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:46:50,842 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 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 2776 [2023-11-29 04:46:50,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:46:50,875 INFO L225 Difference]: With dead ends: 10381 [2023-11-29 04:46:50,875 INFO L226 Difference]: Without dead ends: 8297 [2023-11-29 04:46:50,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5555 GetRequests, 5548 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:46:50,879 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:46:50,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 66 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:46:50,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8297 states. [2023-11-29 04:46:51,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8297 to 8297. [2023-11-29 04:46:51,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8297 states, 8296 states have (on average 1.125) internal successors, (9333), 8296 states have internal predecessors, (9333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8297 states to 8297 states and 9333 transitions. [2023-11-29 04:46:51,772 INFO L78 Accepts]: Start accepts. Automaton has 8297 states and 9333 transitions. Word has length 2776 [2023-11-29 04:46:51,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:46:51,774 INFO L495 AbstractCegarLoop]: Abstraction has 8297 states and 9333 transitions. [2023-11-29 04:46:51,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:46:51,775 INFO L276 IsEmpty]: Start isEmpty. Operand 8297 states and 9333 transitions. [2023-11-29 04:46:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8297 [2023-11-29 04:46:52,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:46:52,095 INFO L195 NwaCegarLoop]: trace histogram [5184, 864, 864, 864, 144, 144, 144, 24, 24, 24, 4, 4, 4, 1, 1, 1, 1] [2023-11-29 04:46:52,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:46:52,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:46:52,295 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:46:52,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:46:52,297 INFO L85 PathProgramCache]: Analyzing trace with hash 679025596, now seen corresponding path program 7 times [2023-11-29 04:46:52,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:46:52,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504812981] [2023-11-29 04:46:52,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:46:52,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:47:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:47:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 19191466 backedges. 0 proven. 14396710 refuted. 0 times theorem prover too weak. 4794756 trivial. 0 not checked. [2023-11-29 04:47:31,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:47:31,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504812981] [2023-11-29 04:47:31,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504812981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:47:31,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814970270] [2023-11-29 04:47:31,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 04:47:31,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:47:31,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:47:31,077 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:47:31,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:47:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:47:34,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 21802 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:47:34,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:47:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 19191466 backedges. 0 proven. 14396710 refuted. 0 times theorem prover too weak. 4794756 trivial. 0 not checked. [2023-11-29 04:47:42,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:47:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 19191466 backedges. 0 proven. 14396710 refuted. 0 times theorem prover too weak. 4794756 trivial. 0 not checked. [2023-11-29 04:47:50,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814970270] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:47:50,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:47:50,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2023-11-29 04:47:50,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492445069] [2023-11-29 04:47:50,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:47:50,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 04:47:50,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:47:50,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 04:47:50,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:47:50,811 INFO L87 Difference]: Start difference. First operand 8297 states and 9333 transitions. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:47:52,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:47:52,091 INFO L93 Difference]: Finished difference Result 12446 states and 14001 transitions. [2023-11-29 04:47:52,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 04:47:52,092 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 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 8296 [2023-11-29 04:47:52,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:47:52,146 INFO L225 Difference]: With dead ends: 12446 [2023-11-29 04:47:52,146 INFO L226 Difference]: Without dead ends: 12443 [2023-11-29 04:47:52,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16596 GetRequests, 16585 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:47:52,150 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:47:52,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 76 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:47:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12443 states. [2023-11-29 04:47:53,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12443 to 12443. [2023-11-29 04:47:53,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12443 states, 12442 states have (on average 1.1249799067674007) internal successors, (13997), 12442 states have internal predecessors, (13997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:47:53,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12443 states to 12443 states and 13997 transitions. [2023-11-29 04:47:53,446 INFO L78 Accepts]: Start accepts. Automaton has 12443 states and 13997 transitions. Word has length 8296 [2023-11-29 04:47:53,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:47:53,451 INFO L495 AbstractCegarLoop]: Abstraction has 12443 states and 13997 transitions. [2023-11-29 04:47:53,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:47:53,451 INFO L276 IsEmpty]: Start isEmpty. Operand 12443 states and 13997 transitions. [2023-11-29 04:47:54,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12443 [2023-11-29 04:47:54,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:47:54,350 INFO L195 NwaCegarLoop]: trace histogram [7776, 1296, 1296, 1296, 216, 216, 216, 36, 36, 36, 6, 6, 6, 1, 1, 1, 1] [2023-11-29 04:47:54,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:47:54,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:47:54,551 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:47:54,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:47:54,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1231396924, now seen corresponding path program 8 times [2023-11-29 04:47:54,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:47:54,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752272041] [2023-11-29 04:47:54,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:47:54,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:48:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 43183905 backedges. 0 proven. 37020105 refuted. 0 times theorem prover too weak. 6163800 trivial. 0 not checked. [2023-11-29 04:51:10,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:10,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752272041] [2023-11-29 04:51:10,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752272041] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:51:10,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994554203] [2023-11-29 04:51:10,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:51:10,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:10,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:51:10,707 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:51:10,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21d34dce-fe7d-413b-9825-9eef541e359f/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:51:16,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:51:16,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:51:16,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 32686 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-29 04:51:16,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:51:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 43183905 backedges. 0 proven. 37020105 refuted. 0 times theorem prover too weak. 6163800 trivial. 0 not checked. [2023-11-29 04:51:33,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:51:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 43183905 backedges. 0 proven. 37020105 refuted. 0 times theorem prover too weak. 6163800 trivial. 0 not checked. [2023-11-29 04:51:55,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994554203] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:51:55,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:51:55,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 37, 37] total 97 [2023-11-29 04:51:55,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083527160] [2023-11-29 04:51:55,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:51:55,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-11-29 04:51:55,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:55,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-11-29 04:51:55,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=975, Invalid=8531, Unknown=0, NotChecked=0, Total=9506 [2023-11-29 04:51:55,305 INFO L87 Difference]: Start difference. First operand 12443 states and 13997 transitions. Second operand has 98 states, 98 states have (on average 4.510204081632653) internal successors, (442), 97 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)