./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/up.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/up.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 ff5c10c83c8d29dcc2c2798035fa2754df224d2313ad9c91b6ee5bb6ca3d9a9f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:04:48,763 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:04:48,832 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:04:48,837 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:04:48,838 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:04:48,864 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:04:48,865 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:04:48,865 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:04:48,866 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:04:48,867 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:04:48,867 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:04:48,868 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:04:48,869 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:04:48,869 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:04:48,870 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:04:48,870 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:04:48,871 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:04:48,871 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:04:48,872 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:04:48,872 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:04:48,872 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:04:48,873 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:04:48,873 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:04:48,874 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:04:48,874 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:04:48,875 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:04:48,875 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:04:48,876 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:04:48,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:04:48,877 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:04:48,877 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:04:48,877 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:04:48,878 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:04:48,878 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:04:48,879 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:04:48,879 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:04:48,879 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:04:48,880 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:04:48,880 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:04:48,881 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_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5c10c83c8d29dcc2c2798035fa2754df224d2313ad9c91b6ee5bb6ca3d9a9f [2023-11-06 22:04:49,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:04:49,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:04:49,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:04:49,222 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:04:49,223 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:04:49,224 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/loop-invgen/up.i [2023-11-06 22:04:52,287 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:04:52,584 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:04:52,584 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/sv-benchmarks/c/loop-invgen/up.i [2023-11-06 22:04:52,592 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/data/498a3a353/d7bba8705b474ee38c6fe456823412d1/FLAG6c1885877 [2023-11-06 22:04:52,611 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/data/498a3a353/d7bba8705b474ee38c6fe456823412d1 [2023-11-06 22:04:52,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:04:52,624 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:04:52,627 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:04:52,628 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:04:52,633 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:04:52,637 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:04:52" (1/1) ... [2023-11-06 22:04:52,638 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26d9465d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:52, skipping insertion in model container [2023-11-06 22:04:52,638 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:04:52" (1/1) ... [2023-11-06 22:04:52,662 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:04:52,858 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_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/sv-benchmarks/c/loop-invgen/up.i[893,906] [2023-11-06 22:04:52,869 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:04:52,878 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:04:52,892 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_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/sv-benchmarks/c/loop-invgen/up.i[893,906] [2023-11-06 22:04:52,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:04:52,913 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:04:52,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:52 WrapperNode [2023-11-06 22:04:52,914 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:04:52,915 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:04:52,915 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:04:52,915 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:04:52,923 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:52" (1/1) ... [2023-11-06 22:04:52,928 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:52" (1/1) ... [2023-11-06 22:04:52,947 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2023-11-06 22:04:52,948 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:04:52,948 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:04:52,948 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:04:52,949 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:04:52,958 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:52" (1/1) ... [2023-11-06 22:04:52,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:52" (1/1) ... [2023-11-06 22:04:52,959 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:52" (1/1) ... [2023-11-06 22:04:52,960 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:52" (1/1) ... [2023-11-06 22:04:52,962 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:52" (1/1) ... [2023-11-06 22:04:52,966 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:52" (1/1) ... [2023-11-06 22:04:52,967 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:52" (1/1) ... [2023-11-06 22:04:52,968 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:52" (1/1) ... [2023-11-06 22:04:52,969 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:04:52,970 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:04:52,970 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:04:52,971 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:04:52,971 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:52" (1/1) ... [2023-11-06 22:04:52,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:04:52,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:53,002 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:04:53,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:04:53,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:04:53,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:04:53,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:04:53,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:04:53,106 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:04:53,108 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:04:53,221 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:04:53,227 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:04:53,227 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:04:53,229 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:04:53 BoogieIcfgContainer [2023-11-06 22:04:53,229 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:04:53,232 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:04:53,232 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:04:53,235 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:04:53,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:04:52" (1/3) ... [2023-11-06 22:04:53,237 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f7dbb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:04:53, skipping insertion in model container [2023-11-06 22:04:53,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:52" (2/3) ... [2023-11-06 22:04:53,238 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f7dbb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:04:53, skipping insertion in model container [2023-11-06 22:04:53,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:04:53" (3/3) ... [2023-11-06 22:04:53,239 INFO L112 eAbstractionObserver]: Analyzing ICFG up.i [2023-11-06 22:04:53,259 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:04:53,259 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:04:53,308 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:04:53,314 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=LoopsAndPotentialCycles, 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;@5e09040b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:04:53,315 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:04:53,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 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) [2023-11-06 22:04:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 22:04:53,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:53,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:53,327 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:53,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:53,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1808851121, now seen corresponding path program 1 times [2023-11-06 22:04:53,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:53,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546386103] [2023-11-06 22:04:53,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:53,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:53,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:53,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546386103] [2023-11-06 22:04:53,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546386103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:53,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:53,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:04:53,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357027751] [2023-11-06 22:04:53,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:53,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:04:53,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:53,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:04:53,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:04:53,719 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 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) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2023-11-06 22:04:53,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:53,820 INFO L93 Difference]: Finished difference Result 25 states and 35 transitions. [2023-11-06 22:04:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:04:53,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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 [2023-11-06 22:04:53,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:53,830 INFO L225 Difference]: With dead ends: 25 [2023-11-06 22:04:53,830 INFO L226 Difference]: Without dead ends: 10 [2023-11-06 22:04:53,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:04:53,838 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:53,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 26 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:04:53,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-06 22:04:53,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-06 22:04:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-11-06 22:04:53,887 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2023-11-06 22:04:53,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:53,887 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-11-06 22:04:53,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2023-11-06 22:04:53,888 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-11-06 22:04:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 22:04:53,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:53,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:53,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:04:53,889 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:53,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:53,890 INFO L85 PathProgramCache]: Analyzing trace with hash 291256044, now seen corresponding path program 1 times [2023-11-06 22:04:53,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:53,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023539936] [2023-11-06 22:04:53,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:53,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:54,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:54,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023539936] [2023-11-06 22:04:54,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023539936] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:54,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470612515] [2023-11-06 22:04:54,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:54,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:54,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:54,044 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:54,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:04:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:54,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:04:54,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:54,217 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:04:54,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470612515] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:54,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:04:54,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-06 22:04:54,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435000563] [2023-11-06 22:04:54,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:54,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:04:54,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:54,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:04:54,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:04:54,229 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:54,289 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2023-11-06 22:04:54,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:04:54,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2023-11-06 22:04:54,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:54,292 INFO L225 Difference]: With dead ends: 20 [2023-11-06 22:04:54,292 INFO L226 Difference]: Without dead ends: 18 [2023-11-06 22:04:54,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:04:54,295 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:54,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:04:54,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-06 22:04:54,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2023-11-06 22:04:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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) [2023-11-06 22:04:54,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-11-06 22:04:54,306 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2023-11-06 22:04:54,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:54,307 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-11-06 22:04:54,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:54,307 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-11-06 22:04:54,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 22:04:54,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:54,309 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:54,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:54,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 22:04:54,514 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:54,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:54,515 INFO L85 PathProgramCache]: Analyzing trace with hash 979689165, now seen corresponding path program 1 times [2023-11-06 22:04:54,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:54,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540203456] [2023-11-06 22:04:54,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:54,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:54,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:54,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540203456] [2023-11-06 22:04:54,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540203456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:54,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575789956] [2023-11-06 22:04:54,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:54,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:54,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:54,665 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:54,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:04:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:54,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:04:54,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:54,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:54,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575789956] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:54,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:04:54,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-06 22:04:54,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015579792] [2023-11-06 22:04:54,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:54,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:04:54,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:54,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:04:54,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:04:54,864 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2023-11-06 22:04:54,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:54,928 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2023-11-06 22:04:54,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:04:54,929 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 11 [2023-11-06 22:04:54,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:54,930 INFO L225 Difference]: With dead ends: 23 [2023-11-06 22:04:54,930 INFO L226 Difference]: Without dead ends: 13 [2023-11-06 22:04:54,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:04:54,932 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:54,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 38 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:04:54,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-06 22:04:54,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-06 22:04:54,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:54,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-11-06 22:04:54,938 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2023-11-06 22:04:54,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:54,938 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-11-06 22:04:54,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2023-11-06 22:04:54,939 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-11-06 22:04:54,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 22:04:54,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:54,940 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:54,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:04:55,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:55,145 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:55,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:55,146 INFO L85 PathProgramCache]: Analyzing trace with hash -510353528, now seen corresponding path program 2 times [2023-11-06 22:04:55,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:55,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478758084] [2023-11-06 22:04:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:55,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:55,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:55,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478758084] [2023-11-06 22:04:55,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478758084] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:55,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661322847] [2023-11-06 22:04:55,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:04:55,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:55,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:55,291 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:55,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:04:55,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:04:55,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:04:55,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:04:55,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:55,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:55,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661322847] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:55,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:04:55,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2023-11-06 22:04:55,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031739632] [2023-11-06 22:04:55,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:55,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:04:55,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:55,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:04:55,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:04:55,429 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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) [2023-11-06 22:04:55,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:55,501 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2023-11-06 22:04:55,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:04:55,502 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 12 [2023-11-06 22:04:55,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:55,503 INFO L225 Difference]: With dead ends: 24 [2023-11-06 22:04:55,503 INFO L226 Difference]: Without dead ends: 22 [2023-11-06 22:04:55,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:04:55,505 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:55,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:04:55,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-06 22:04:55,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2023-11-06 22:04:55,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:55,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-11-06 22:04:55,510 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2023-11-06 22:04:55,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:55,510 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-11-06 22:04:55,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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) [2023-11-06 22:04:55,511 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-11-06 22:04:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 22:04:55,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:55,512 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:55,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:55,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:55,717 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:55,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:55,718 INFO L85 PathProgramCache]: Analyzing trace with hash 247095473, now seen corresponding path program 3 times [2023-11-06 22:04:55,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:55,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399410421] [2023-11-06 22:04:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:55,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:55,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:55,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399410421] [2023-11-06 22:04:55,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399410421] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:55,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960642327] [2023-11-06 22:04:55,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:04:55,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:55,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:55,952 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:55,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:04:56,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:04:56,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:04:56,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:04:56,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:56,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:56,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:56,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960642327] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:56,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:04:56,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-06 22:04:56,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902100191] [2023-11-06 22:04:56,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:56,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:04:56,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:56,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:04:56,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:04:56,259 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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) [2023-11-06 22:04:56,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:56,355 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2023-11-06 22:04:56,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:04:56,355 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 15 [2023-11-06 22:04:56,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:56,356 INFO L225 Difference]: With dead ends: 30 [2023-11-06 22:04:56,356 INFO L226 Difference]: Without dead ends: 17 [2023-11-06 22:04:56,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:04:56,358 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:56,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:04:56,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-06 22:04:56,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-06 22:04:56,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 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) [2023-11-06 22:04:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-11-06 22:04:56,363 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2023-11-06 22:04:56,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:56,363 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-11-06 22:04:56,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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) [2023-11-06 22:04:56,364 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-11-06 22:04:56,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 22:04:56,364 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:56,364 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:56,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:56,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:56,565 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:56,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:56,566 INFO L85 PathProgramCache]: Analyzing trace with hash 576015340, now seen corresponding path program 4 times [2023-11-06 22:04:56,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:56,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953729143] [2023-11-06 22:04:56,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:56,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:56,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:56,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953729143] [2023-11-06 22:04:56,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953729143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:56,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610196893] [2023-11-06 22:04:56,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:04:56,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:56,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:56,671 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:56,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:04:56,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:04:56,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:04:56,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:04:56,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:56,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:56,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610196893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:56,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:04:56,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2023-11-06 22:04:56,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347035040] [2023-11-06 22:04:56,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:56,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:04:56,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:56,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:04:56,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:04:56,839 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2023-11-06 22:04:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:56,921 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2023-11-06 22:04:56,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:04:56,921 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) Word has length 16 [2023-11-06 22:04:56,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:56,925 INFO L225 Difference]: With dead ends: 28 [2023-11-06 22:04:56,925 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 22:04:56,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:04:56,928 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:56,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:04:56,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 22:04:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2023-11-06 22:04:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) [2023-11-06 22:04:56,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-11-06 22:04:56,940 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2023-11-06 22:04:56,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:56,940 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-11-06 22:04:56,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2023-11-06 22:04:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-11-06 22:04:56,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 22:04:56,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:56,944 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:56,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:57,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:57,150 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:57,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:57,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1683466701, now seen corresponding path program 5 times [2023-11-06 22:04:57,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:57,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634126261] [2023-11-06 22:04:57,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:57,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:57,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:57,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634126261] [2023-11-06 22:04:57,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634126261] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:57,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634574391] [2023-11-06 22:04:57,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:04:57,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:57,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:57,300 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:57,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:04:57,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 22:04:57,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:04:57,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:04:57,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:57,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:57,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634574391] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:57,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:04:57,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-06 22:04:57,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624557323] [2023-11-06 22:04:57,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:57,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:04:57,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:57,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:04:57,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:04:57,581 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:57,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:57,690 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2023-11-06 22:04:57,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:04:57,690 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-06 22:04:57,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:57,691 INFO L225 Difference]: With dead ends: 37 [2023-11-06 22:04:57,691 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 22:04:57,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:04:57,693 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:57,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 52 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:04:57,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 22:04:57,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-06 22:04:57,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 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) [2023-11-06 22:04:57,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-11-06 22:04:57,698 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2023-11-06 22:04:57,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:57,699 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-11-06 22:04:57,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:57,699 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-11-06 22:04:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 22:04:57,700 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:57,700 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:57,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:57,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:04:57,911 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:57,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:57,912 INFO L85 PathProgramCache]: Analyzing trace with hash 230981512, now seen corresponding path program 6 times [2023-11-06 22:04:57,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:57,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095741772] [2023-11-06 22:04:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:57,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:58,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:58,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095741772] [2023-11-06 22:04:58,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095741772] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:58,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343455469] [2023-11-06 22:04:58,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:04:58,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:58,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:58,041 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:58,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:04:58,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-06 22:04:58,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:04:58,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:04:58,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:58,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:58,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343455469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:58,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:04:58,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2023-11-06 22:04:58,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916948839] [2023-11-06 22:04:58,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:58,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:04:58,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:58,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:04:58,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:04:58,255 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:58,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:58,339 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2023-11-06 22:04:58,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:04:58,339 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-06 22:04:58,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:58,340 INFO L225 Difference]: With dead ends: 32 [2023-11-06 22:04:58,341 INFO L226 Difference]: Without dead ends: 30 [2023-11-06 22:04:58,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:04:58,343 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:58,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 33 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:04:58,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-06 22:04:58,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2023-11-06 22:04:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 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) [2023-11-06 22:04:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-11-06 22:04:58,351 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2023-11-06 22:04:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:58,352 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-11-06 22:04:58,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-11-06 22:04:58,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-06 22:04:58,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:58,354 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:58,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:58,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:58,560 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:58,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:58,560 INFO L85 PathProgramCache]: Analyzing trace with hash 637436081, now seen corresponding path program 7 times [2023-11-06 22:04:58,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:58,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886329183] [2023-11-06 22:04:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:58,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:58,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:58,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886329183] [2023-11-06 22:04:58,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886329183] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:58,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459823702] [2023-11-06 22:04:58,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:04:58,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:58,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:58,724 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:58,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:04:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:58,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:04:58,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:58,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:59,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459823702] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:59,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:04:59,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-11-06 22:04:59,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035890309] [2023-11-06 22:04:59,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:59,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:04:59,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:59,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:04:59,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:04:59,094 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:59,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:59,222 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-11-06 22:04:59,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:04:59,223 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-06 22:04:59,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:59,224 INFO L225 Difference]: With dead ends: 44 [2023-11-06 22:04:59,224 INFO L226 Difference]: Without dead ends: 25 [2023-11-06 22:04:59,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:04:59,225 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:59,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 65 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:04:59,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-06 22:04:59,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-06 22:04:59,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:59,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-11-06 22:04:59,231 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2023-11-06 22:04:59,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:59,231 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-11-06 22:04:59,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:59,232 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-11-06 22:04:59,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 22:04:59,232 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:59,232 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:59,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:59,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:04:59,438 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:59,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:59,439 INFO L85 PathProgramCache]: Analyzing trace with hash -45874964, now seen corresponding path program 8 times [2023-11-06 22:04:59,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:59,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840032842] [2023-11-06 22:04:59,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:59,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:59,581 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:59,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:59,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840032842] [2023-11-06 22:04:59,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840032842] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:59,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010749503] [2023-11-06 22:04:59,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:04:59,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:59,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:59,584 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:59,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:04:59,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:04:59,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:04:59,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:04:59,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:04:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:59,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:59,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010749503] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:04:59,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:04:59,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2023-11-06 22:04:59,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741188039] [2023-11-06 22:04:59,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:59,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:04:59,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:59,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:04:59,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:04:59,797 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:59,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:59,885 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-11-06 22:04:59,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:04:59,886 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2023-11-06 22:04:59,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:59,889 INFO L225 Difference]: With dead ends: 36 [2023-11-06 22:04:59,889 INFO L226 Difference]: Without dead ends: 34 [2023-11-06 22:04:59,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:04:59,891 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:59,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 24 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:04:59,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-06 22:04:59,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2023-11-06 22:04:59,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 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) [2023-11-06 22:04:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-11-06 22:04:59,903 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2023-11-06 22:04:59,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:59,904 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-11-06 22:04:59,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:59,904 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-11-06 22:04:59,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 22:04:59,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:59,905 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-11-06 22:04:59,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:00,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:05:00,111 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:00,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:00,111 INFO L85 PathProgramCache]: Analyzing trace with hash -856632115, now seen corresponding path program 9 times [2023-11-06 22:05:00,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:00,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86502751] [2023-11-06 22:05:00,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:00,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:00,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:00,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86502751] [2023-11-06 22:05:00,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86502751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:00,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776706840] [2023-11-06 22:05:00,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:05:00,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:00,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:00,319 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:00,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:05:00,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 22:05:00,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:00,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:05:00,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:00,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:00,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776706840] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:00,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:00,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-06 22:05:00,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229830494] [2023-11-06 22:05:00,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:00,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:05:00,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:00,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:05:00,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:05:00,712 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:00,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:00,844 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2023-11-06 22:05:00,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:05:00,845 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 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 27 [2023-11-06 22:05:00,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:00,847 INFO L225 Difference]: With dead ends: 51 [2023-11-06 22:05:00,847 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 22:05:00,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2023-11-06 22:05:00,849 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:00,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 57 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:05:00,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 22:05:00,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-06 22:05:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:00,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-11-06 22:05:00,860 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2023-11-06 22:05:00,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:00,861 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-11-06 22:05:00,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:00,862 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-11-06 22:05:00,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 22:05:00,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:00,864 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:00,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:01,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:05:01,069 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:01,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:01,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2001354872, now seen corresponding path program 10 times [2023-11-06 22:05:01,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:01,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885960841] [2023-11-06 22:05:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:01,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:01,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:01,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885960841] [2023-11-06 22:05:01,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885960841] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:01,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465769351] [2023-11-06 22:05:01,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:05:01,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:01,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:01,262 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:01,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:05:01,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:05:01,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:01,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:05:01,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:01,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:01,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465769351] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:01,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:01,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2023-11-06 22:05:01,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571661930] [2023-11-06 22:05:01,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:01,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:05:01,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:01,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:05:01,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:05:01,495 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:01,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:01,614 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2023-11-06 22:05:01,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:05:01,614 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 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 28 [2023-11-06 22:05:01,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:01,617 INFO L225 Difference]: With dead ends: 40 [2023-11-06 22:05:01,617 INFO L226 Difference]: Without dead ends: 38 [2023-11-06 22:05:01,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:05:01,619 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:01,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:01,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-06 22:05:01,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2023-11-06 22:05:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:01,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-11-06 22:05:01,639 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2023-11-06 22:05:01,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:01,639 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-11-06 22:05:01,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-11-06 22:05:01,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-06 22:05:01,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:01,644 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:01,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:01,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:01,849 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:01,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:01,850 INFO L85 PathProgramCache]: Analyzing trace with hash 377831601, now seen corresponding path program 11 times [2023-11-06 22:05:01,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:01,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874214905] [2023-11-06 22:05:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:01,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:02,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:02,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874214905] [2023-11-06 22:05:02,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874214905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:02,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328159514] [2023-11-06 22:05:02,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:05:02,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:02,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:02,076 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:02,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:05:02,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-06 22:05:02,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:02,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:05:02,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:02,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:02,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328159514] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:02,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:02,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-06 22:05:02,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490572933] [2023-11-06 22:05:02,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:02,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:05:02,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:02,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:05:02,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:05:02,523 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:02,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:02,719 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2023-11-06 22:05:02,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:05:02,719 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-06 22:05:02,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:02,720 INFO L225 Difference]: With dead ends: 58 [2023-11-06 22:05:02,720 INFO L226 Difference]: Without dead ends: 33 [2023-11-06 22:05:02,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 40 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:05:02,722 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:02,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 102 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:02,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-06 22:05:02,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-06 22:05:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:02,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-11-06 22:05:02,728 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2023-11-06 22:05:02,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:02,729 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-11-06 22:05:02,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:02,729 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-11-06 22:05:02,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:05:02,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:02,730 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:02,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-06 22:05:02,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:05:02,936 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:02,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:02,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1007703532, now seen corresponding path program 12 times [2023-11-06 22:05:02,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:02,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407127773] [2023-11-06 22:05:02,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:02,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:03,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:03,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407127773] [2023-11-06 22:05:03,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407127773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:03,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249834207] [2023-11-06 22:05:03,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:05:03,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:03,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:03,131 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:03,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:05:03,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-06 22:05:03,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:03,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:05:03,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:03,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:03,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249834207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:03,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:03,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2023-11-06 22:05:03,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288093842] [2023-11-06 22:05:03,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:03,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:05:03,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:03,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:05:03,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:05:03,402 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:03,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:03,545 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2023-11-06 22:05:03,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:05:03,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 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 32 [2023-11-06 22:05:03,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:03,546 INFO L225 Difference]: With dead ends: 44 [2023-11-06 22:05:03,546 INFO L226 Difference]: Without dead ends: 42 [2023-11-06 22:05:03,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 14 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:05:03,547 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:03,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 28 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:03,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-06 22:05:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2023-11-06 22:05:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 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) [2023-11-06 22:05:03,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2023-11-06 22:05:03,554 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2023-11-06 22:05:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:03,554 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2023-11-06 22:05:03,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2023-11-06 22:05:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-06 22:05:03,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:03,555 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:03,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:03,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:05:03,764 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:03,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:03,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1320656947, now seen corresponding path program 13 times [2023-11-06 22:05:03,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:03,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747369350] [2023-11-06 22:05:03,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:03,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:04,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:04,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747369350] [2023-11-06 22:05:04,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747369350] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:04,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042157036] [2023-11-06 22:05:04,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:05:04,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:04,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:04,075 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:04,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:05:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:04,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:05:04,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:04,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:04,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042157036] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:04,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:04,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-06 22:05:04,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345808951] [2023-11-06 22:05:04,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:04,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:05:04,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:04,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:05:04,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:05:04,629 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:04,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:04,851 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2023-11-06 22:05:04,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:05:04,851 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 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 35 [2023-11-06 22:05:04,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:04,851 INFO L225 Difference]: With dead ends: 65 [2023-11-06 22:05:04,852 INFO L226 Difference]: Without dead ends: 37 [2023-11-06 22:05:04,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 15 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 22:05:04,853 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:04,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 85 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:04,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-06 22:05:04,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-06 22:05:04,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2023-11-06 22:05:04,859 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2023-11-06 22:05:04,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:04,859 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2023-11-06 22:05:04,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:04,860 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2023-11-06 22:05:04,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-06 22:05:04,860 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:04,860 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:04,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:05,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:05,061 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:05,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:05,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1149263752, now seen corresponding path program 14 times [2023-11-06 22:05:05,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:05,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333960298] [2023-11-06 22:05:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:05,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:05,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:05,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333960298] [2023-11-06 22:05:05,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333960298] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:05,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598412102] [2023-11-06 22:05:05,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:05:05,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:05,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:05,285 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:05,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:05:05,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:05:05,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:05,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:05:05,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:05,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:05,571 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:05,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598412102] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:05,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:05,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2023-11-06 22:05:05,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63118691] [2023-11-06 22:05:05,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:05,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:05:05,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:05,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:05:05,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:05:05,573 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:05,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:05,720 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2023-11-06 22:05:05,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:05:05,721 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-06 22:05:05,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:05,722 INFO L225 Difference]: With dead ends: 48 [2023-11-06 22:05:05,722 INFO L226 Difference]: Without dead ends: 46 [2023-11-06 22:05:05,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 61 SyntacticMatches, 16 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:05:05,723 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:05,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 31 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:05,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-06 22:05:05,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2023-11-06 22:05:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:05,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2023-11-06 22:05:05,730 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2023-11-06 22:05:05,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:05,731 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2023-11-06 22:05:05,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:05,731 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2023-11-06 22:05:05,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-06 22:05:05,738 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:05,738 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:05,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:05,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:05:05,945 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:05,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:05,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1758027599, now seen corresponding path program 15 times [2023-11-06 22:05:05,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:05,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745511970] [2023-11-06 22:05:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:05,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:06,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:06,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745511970] [2023-11-06 22:05:06,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745511970] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:06,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929299288] [2023-11-06 22:05:06,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:05:06,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:06,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:06,275 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:06,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:05:06,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-06 22:05:06,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:06,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:05:06,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:06,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:06,857 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:06,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929299288] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:06,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:06,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-11-06 22:05:06,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886828989] [2023-11-06 22:05:06,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:06,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:05:06,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:06,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:05:06,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:05:06,860 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:07,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:07,143 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2023-11-06 22:05:07,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:05:07,144 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-06 22:05:07,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:07,144 INFO L225 Difference]: With dead ends: 72 [2023-11-06 22:05:07,145 INFO L226 Difference]: Without dead ends: 41 [2023-11-06 22:05:07,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 17 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=403, Invalid=1319, Unknown=0, NotChecked=0, Total=1722 [2023-11-06 22:05:07,146 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:07,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 126 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:07,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-06 22:05:07,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-06 22:05:07,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:07,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2023-11-06 22:05:07,155 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2023-11-06 22:05:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:07,155 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2023-11-06 22:05:07,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:07,156 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2023-11-06 22:05:07,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-06 22:05:07,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:07,158 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:07,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:07,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:05:07,363 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:07,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:07,364 INFO L85 PathProgramCache]: Analyzing trace with hash -895333652, now seen corresponding path program 16 times [2023-11-06 22:05:07,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:07,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483313444] [2023-11-06 22:05:07,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:07,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:07,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:07,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483313444] [2023-11-06 22:05:07,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483313444] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:07,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024300979] [2023-11-06 22:05:07,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:05:07,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:07,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:07,616 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:07,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:05:07,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:05:07,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:07,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:05:07,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:07,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:07,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024300979] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:07,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:07,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2023-11-06 22:05:07,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939256368] [2023-11-06 22:05:07,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:07,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:05:07,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:07,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:05:07,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:05:07,934 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:08,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:08,090 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2023-11-06 22:05:08,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:05:08,090 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-06 22:05:08,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:08,091 INFO L225 Difference]: With dead ends: 52 [2023-11-06 22:05:08,091 INFO L226 Difference]: Without dead ends: 50 [2023-11-06 22:05:08,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 68 SyntacticMatches, 18 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:05:08,100 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:08,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 23 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:08,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-06 22:05:08,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2023-11-06 22:05:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:08,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2023-11-06 22:05:08,107 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2023-11-06 22:05:08,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:08,109 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2023-11-06 22:05:08,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:08,109 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2023-11-06 22:05:08,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-06 22:05:08,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:08,110 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:08,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:08,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:05:08,315 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:08,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:08,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1133098291, now seen corresponding path program 17 times [2023-11-06 22:05:08,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:08,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154667035] [2023-11-06 22:05:08,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:08,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:08,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:08,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154667035] [2023-11-06 22:05:08,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154667035] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:08,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313161840] [2023-11-06 22:05:08,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:05:08,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:08,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:08,728 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:08,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:05:08,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-06 22:05:08,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:08,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:05:08,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:09,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:09,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313161840] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:09,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:09,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-11-06 22:05:09,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082352899] [2023-11-06 22:05:09,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:09,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 22:05:09,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:09,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 22:05:09,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:05:09,463 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:09,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:09,752 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2023-11-06 22:05:09,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:05:09,752 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-06 22:05:09,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:09,753 INFO L225 Difference]: With dead ends: 79 [2023-11-06 22:05:09,753 INFO L226 Difference]: Without dead ends: 45 [2023-11-06 22:05:09,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 55 SyntacticMatches, 19 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=481, Invalid=1589, Unknown=0, NotChecked=0, Total=2070 [2023-11-06 22:05:09,755 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:09,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 130 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:09,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-06 22:05:09,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-06 22:05:09,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:09,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2023-11-06 22:05:09,763 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2023-11-06 22:05:09,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:09,763 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2023-11-06 22:05:09,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:09,763 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2023-11-06 22:05:09,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-06 22:05:09,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:09,764 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:09,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-06 22:05:09,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:09,970 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:09,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:09,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1589878904, now seen corresponding path program 18 times [2023-11-06 22:05:09,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:09,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777518742] [2023-11-06 22:05:09,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:09,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:10,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:10,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777518742] [2023-11-06 22:05:10,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777518742] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:10,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034055159] [2023-11-06 22:05:10,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:05:10,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:10,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:10,264 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:10,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:05:10,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-11-06 22:05:10,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:10,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:05:10,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:10,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:10,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034055159] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:10,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:10,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2023-11-06 22:05:10,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993363719] [2023-11-06 22:05:10,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:10,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:05:10,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:10,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:05:10,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:05:10,648 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:10,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:10,819 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2023-11-06 22:05:10,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:05:10,820 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 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 44 [2023-11-06 22:05:10,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:10,820 INFO L225 Difference]: With dead ends: 56 [2023-11-06 22:05:10,820 INFO L226 Difference]: Without dead ends: 54 [2023-11-06 22:05:10,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 75 SyntacticMatches, 20 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:05:10,822 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:10,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 26 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-06 22:05:10,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2023-11-06 22:05:10,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2023-11-06 22:05:10,830 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2023-11-06 22:05:10,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:10,830 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2023-11-06 22:05:10,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2023-11-06 22:05:10,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-06 22:05:10,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:10,832 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:10,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:11,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:11,038 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:11,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:11,038 INFO L85 PathProgramCache]: Analyzing trace with hash 821731505, now seen corresponding path program 19 times [2023-11-06 22:05:11,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:11,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703821504] [2023-11-06 22:05:11,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:11,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:11,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:11,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703821504] [2023-11-06 22:05:11,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703821504] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:11,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302129198] [2023-11-06 22:05:11,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:05:11,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:11,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:11,492 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:11,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:05:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:11,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:05:11,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:12,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:12,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302129198] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:12,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:12,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-11-06 22:05:12,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380695410] [2023-11-06 22:05:12,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:12,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-06 22:05:12,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:12,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-06 22:05:12,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 22:05:12,333 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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) [2023-11-06 22:05:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:12,657 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2023-11-06 22:05:12,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:05:12,658 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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 47 [2023-11-06 22:05:12,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:12,658 INFO L225 Difference]: With dead ends: 86 [2023-11-06 22:05:12,658 INFO L226 Difference]: Without dead ends: 49 [2023-11-06 22:05:12,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 60 SyntacticMatches, 21 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=566, Invalid=1884, Unknown=0, NotChecked=0, Total=2450 [2023-11-06 22:05:12,660 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:12,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 136 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:12,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-06 22:05:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-06 22:05:12,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2023-11-06 22:05:12,668 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2023-11-06 22:05:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:12,668 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2023-11-06 22:05:12,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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) [2023-11-06 22:05:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2023-11-06 22:05:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-06 22:05:12,669 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:12,670 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:12,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:12,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:12,882 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:12,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:12,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1726078956, now seen corresponding path program 20 times [2023-11-06 22:05:12,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:12,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533566417] [2023-11-06 22:05:12,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:12,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:13,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:13,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533566417] [2023-11-06 22:05:13,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533566417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:13,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773423067] [2023-11-06 22:05:13,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:05:13,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:13,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:13,240 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:13,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:05:13,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:05:13,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:13,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:05:13,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:13,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:13,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773423067] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:13,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:13,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2023-11-06 22:05:13,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704373881] [2023-11-06 22:05:13,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:13,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:05:13,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:13,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:05:13,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:05:13,623 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:13,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:13,821 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2023-11-06 22:05:13,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:05:13,822 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 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 48 [2023-11-06 22:05:13,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:13,823 INFO L225 Difference]: With dead ends: 60 [2023-11-06 22:05:13,823 INFO L226 Difference]: Without dead ends: 58 [2023-11-06 22:05:13,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 82 SyntacticMatches, 22 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:05:13,824 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:13,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 24 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:13,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-06 22:05:13,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2023-11-06 22:05:13,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:13,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2023-11-06 22:05:13,833 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2023-11-06 22:05:13,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:13,834 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2023-11-06 22:05:13,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:13,834 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2023-11-06 22:05:13,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-06 22:05:13,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:13,835 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:13,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:14,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:14,041 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:14,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:14,041 INFO L85 PathProgramCache]: Analyzing trace with hash -2020436531, now seen corresponding path program 21 times [2023-11-06 22:05:14,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:14,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10624298] [2023-11-06 22:05:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:14,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:14,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:14,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10624298] [2023-11-06 22:05:14,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10624298] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:14,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6918212] [2023-11-06 22:05:14,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:05:14,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:14,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:14,549 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:14,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:05:14,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-11-06 22:05:14,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:14,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:05:14,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:15,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:15,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6918212] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:15,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:15,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-11-06 22:05:15,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093806003] [2023-11-06 22:05:15,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:15,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 22:05:15,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:15,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 22:05:15,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1258, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:05:15,456 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:15,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:15,821 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2023-11-06 22:05:15,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:05:15,822 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-11-06 22:05:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:15,822 INFO L225 Difference]: With dead ends: 93 [2023-11-06 22:05:15,822 INFO L226 Difference]: Without dead ends: 53 [2023-11-06 22:05:15,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 65 SyntacticMatches, 23 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=658, Invalid=2204, Unknown=0, NotChecked=0, Total=2862 [2023-11-06 22:05:15,825 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:15,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 114 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:15,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-06 22:05:15,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-06 22:05:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-11-06 22:05:15,849 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 51 [2023-11-06 22:05:15,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:15,850 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-11-06 22:05:15,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-11-06 22:05:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-06 22:05:15,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:15,853 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:15,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-06 22:05:16,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:05:16,054 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:16,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:16,055 INFO L85 PathProgramCache]: Analyzing trace with hash -318652536, now seen corresponding path program 22 times [2023-11-06 22:05:16,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:16,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774916212] [2023-11-06 22:05:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:16,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:16,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:16,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774916212] [2023-11-06 22:05:16,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774916212] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:16,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611103099] [2023-11-06 22:05:16,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:05:16,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:16,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:16,406 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:16,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:05:16,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:05:16,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:16,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:05:16,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:16,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:16,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611103099] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:16,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:16,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2023-11-06 22:05:16,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144251920] [2023-11-06 22:05:16,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:16,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:05:16,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:16,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:05:16,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:05:16,818 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:17,050 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2023-11-06 22:05:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 22:05:17,051 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 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 52 [2023-11-06 22:05:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:17,051 INFO L225 Difference]: With dead ends: 64 [2023-11-06 22:05:17,051 INFO L226 Difference]: Without dead ends: 62 [2023-11-06 22:05:17,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 89 SyntacticMatches, 24 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:05:17,053 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:17,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-06 22:05:17,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2023-11-06 22:05:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2023-11-06 22:05:17,067 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2023-11-06 22:05:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:17,067 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2023-11-06 22:05:17,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2023-11-06 22:05:17,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-06 22:05:17,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:17,068 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:17,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:17,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:05:17,274 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:17,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:17,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1095155535, now seen corresponding path program 23 times [2023-11-06 22:05:17,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:17,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057957856] [2023-11-06 22:05:17,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:17,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:17,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:17,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057957856] [2023-11-06 22:05:17,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057957856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:17,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52267970] [2023-11-06 22:05:17,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:05:17,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:17,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:17,805 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:17,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:05:17,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-06 22:05:17,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:17,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:05:17,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:18,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:18,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52267970] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:18,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:18,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2023-11-06 22:05:18,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656695351] [2023-11-06 22:05:18,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:18,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 22:05:18,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:18,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 22:05:18,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=1453, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 22:05:18,829 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:19,183 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2023-11-06 22:05:19,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:05:19,183 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-06 22:05:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:19,184 INFO L225 Difference]: With dead ends: 100 [2023-11-06 22:05:19,184 INFO L226 Difference]: Without dead ends: 57 [2023-11-06 22:05:19,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 70 SyntacticMatches, 25 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=757, Invalid=2549, Unknown=0, NotChecked=0, Total=3306 [2023-11-06 22:05:19,187 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:19,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 109 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-06 22:05:19,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-06 22:05:19,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-11-06 22:05:19,199 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2023-11-06 22:05:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:19,200 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-11-06 22:05:19,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 44 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:19,200 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-11-06 22:05:19,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-06 22:05:19,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:19,201 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:19,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:19,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 22:05:19,406 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:19,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:19,407 INFO L85 PathProgramCache]: Analyzing trace with hash 548869356, now seen corresponding path program 24 times [2023-11-06 22:05:19,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:19,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126594449] [2023-11-06 22:05:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:19,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:19,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:19,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126594449] [2023-11-06 22:05:19,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126594449] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:19,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473373748] [2023-11-06 22:05:19,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:05:19,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:19,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:19,780 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:19,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:05:19,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-06 22:05:19,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:19,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:05:19,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:19,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:20,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473373748] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:20,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:20,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2023-11-06 22:05:20,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051002106] [2023-11-06 22:05:20,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:20,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:05:20,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:20,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:05:20,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:05:20,262 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:20,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:20,473 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2023-11-06 22:05:20,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:05:20,474 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 56 [2023-11-06 22:05:20,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:20,475 INFO L225 Difference]: With dead ends: 68 [2023-11-06 22:05:20,475 INFO L226 Difference]: Without dead ends: 66 [2023-11-06 22:05:20,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 96 SyntacticMatches, 26 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:05:20,476 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:20,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 23 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:20,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-06 22:05:20,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2023-11-06 22:05:20,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:20,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2023-11-06 22:05:20,487 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2023-11-06 22:05:20,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:20,487 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2023-11-06 22:05:20,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2023-11-06 22:05:20,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 22:05:20,488 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:20,488 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:20,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:20,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 22:05:20,692 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:20,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:20,692 INFO L85 PathProgramCache]: Analyzing trace with hash 431309005, now seen corresponding path program 25 times [2023-11-06 22:05:20,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:20,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076593044] [2023-11-06 22:05:20,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:20,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:21,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:21,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076593044] [2023-11-06 22:05:21,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076593044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:21,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680125540] [2023-11-06 22:05:21,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:05:21,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:21,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:21,316 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:21,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:05:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:21,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:05:21,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:21,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:22,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680125540] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:22,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:22,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-11-06 22:05:22,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084564557] [2023-11-06 22:05:22,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:22,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-06 22:05:22,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:22,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-06 22:05:22,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 22:05:22,365 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:22,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:22,767 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2023-11-06 22:05:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:05:22,768 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 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 59 [2023-11-06 22:05:22,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:22,768 INFO L225 Difference]: With dead ends: 107 [2023-11-06 22:05:22,768 INFO L226 Difference]: Without dead ends: 61 [2023-11-06 22:05:22,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 75 SyntacticMatches, 27 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=863, Invalid=2919, Unknown=0, NotChecked=0, Total=3782 [2023-11-06 22:05:22,771 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:22,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:22,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-06 22:05:22,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-06 22:05:22,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:22,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2023-11-06 22:05:22,784 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2023-11-06 22:05:22,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:22,785 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2023-11-06 22:05:22,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:22,785 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2023-11-06 22:05:22,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-06 22:05:22,786 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:22,786 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:22,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:22,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:05:22,991 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:22,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:22,992 INFO L85 PathProgramCache]: Analyzing trace with hash -471302264, now seen corresponding path program 26 times [2023-11-06 22:05:22,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:22,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655087649] [2023-11-06 22:05:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:22,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:23,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:23,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655087649] [2023-11-06 22:05:23,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655087649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:23,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445485198] [2023-11-06 22:05:23,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:05:23,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:23,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:23,388 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:23,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:05:23,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:05:23,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:23,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:05:23,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:23,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:23,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445485198] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:23,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:23,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2023-11-06 22:05:23,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971283697] [2023-11-06 22:05:23,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:23,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:05:23,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:23,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:05:23,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:05:23,860 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:24,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:24,074 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2023-11-06 22:05:24,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:05:24,075 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 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 60 [2023-11-06 22:05:24,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:24,076 INFO L225 Difference]: With dead ends: 72 [2023-11-06 22:05:24,076 INFO L226 Difference]: Without dead ends: 70 [2023-11-06 22:05:24,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 103 SyntacticMatches, 28 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:05:24,077 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:24,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 32 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:24,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-06 22:05:24,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2023-11-06 22:05:24,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:24,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2023-11-06 22:05:24,087 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2023-11-06 22:05:24,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:24,087 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2023-11-06 22:05:24,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:24,087 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2023-11-06 22:05:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 22:05:24,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:24,094 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:24,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:24,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:05:24,296 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:24,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:24,296 INFO L85 PathProgramCache]: Analyzing trace with hash -312835919, now seen corresponding path program 27 times [2023-11-06 22:05:24,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:24,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360867676] [2023-11-06 22:05:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:24,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:24,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:24,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360867676] [2023-11-06 22:05:24,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360867676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:24,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432250239] [2023-11-06 22:05:24,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:05:24,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:24,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:24,957 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:24,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:05:25,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-11-06 22:05:25,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:25,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:05:25,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:25,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:26,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432250239] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:26,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:26,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-11-06 22:05:26,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978307978] [2023-11-06 22:05:26,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:26,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-06 22:05:26,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:26,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-06 22:05:26,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=1885, Unknown=0, NotChecked=0, Total=2450 [2023-11-06 22:05:26,143 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:26,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:26,591 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2023-11-06 22:05:26,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 22:05:26,591 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-11-06 22:05:26,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:26,592 INFO L225 Difference]: With dead ends: 114 [2023-11-06 22:05:26,592 INFO L226 Difference]: Without dead ends: 65 [2023-11-06 22:05:26,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 80 SyntacticMatches, 29 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1779 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=976, Invalid=3314, Unknown=0, NotChecked=0, Total=4290 [2023-11-06 22:05:26,595 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:26,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 162 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:26,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-06 22:05:26,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-06 22:05:26,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2023-11-06 22:05:26,606 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 63 [2023-11-06 22:05:26,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:26,607 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2023-11-06 22:05:26,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2023-11-06 22:05:26,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-06 22:05:26,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:26,608 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:26,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:26,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:05:26,808 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:26,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:26,808 INFO L85 PathProgramCache]: Analyzing trace with hash -636884500, now seen corresponding path program 28 times [2023-11-06 22:05:26,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:26,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400121841] [2023-11-06 22:05:26,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:26,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 105 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:27,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:27,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400121841] [2023-11-06 22:05:27,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400121841] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:27,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755336376] [2023-11-06 22:05:27,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:05:27,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:27,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:27,241 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:27,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 22:05:27,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:05:27,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:27,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:05:27,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:27,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:27,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755336376] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:27,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:27,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2023-11-06 22:05:27,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769363147] [2023-11-06 22:05:27,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:27,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:05:27,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:27,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:05:27,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:05:27,790 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:28,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:28,056 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2023-11-06 22:05:28,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 22:05:28,056 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 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 64 [2023-11-06 22:05:28,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:28,057 INFO L225 Difference]: With dead ends: 76 [2023-11-06 22:05:28,057 INFO L226 Difference]: Without dead ends: 74 [2023-11-06 22:05:28,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 110 SyntacticMatches, 30 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:05:28,059 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:28,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 34 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:28,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-06 22:05:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2023-11-06 22:05:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:28,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2023-11-06 22:05:28,076 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2023-11-06 22:05:28,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:28,077 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2023-11-06 22:05:28,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:28,077 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2023-11-06 22:05:28,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-06 22:05:28,078 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:28,078 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:28,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:28,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:28,284 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:28,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:28,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1744194509, now seen corresponding path program 29 times [2023-11-06 22:05:28,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:28,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553437073] [2023-11-06 22:05:28,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:28,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:29,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:29,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553437073] [2023-11-06 22:05:29,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553437073] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:29,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661519850] [2023-11-06 22:05:29,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:05:29,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:29,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:29,060 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:29,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 22:05:29,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-11-06 22:05:29,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:29,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:05:29,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:29,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:30,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661519850] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:30,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:30,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2023-11-06 22:05:30,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992565582] [2023-11-06 22:05:30,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:30,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-06 22:05:30,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:30,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-06 22:05:30,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=2122, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 22:05:30,395 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:30,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:30,939 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2023-11-06 22:05:30,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 22:05:30,939 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-06 22:05:30,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:30,940 INFO L225 Difference]: With dead ends: 121 [2023-11-06 22:05:30,940 INFO L226 Difference]: Without dead ends: 69 [2023-11-06 22:05:30,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 85 SyntacticMatches, 31 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1096, Invalid=3734, Unknown=0, NotChecked=0, Total=4830 [2023-11-06 22:05:30,943 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:30,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 235 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:05:30,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-06 22:05:30,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-06 22:05:30,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 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) [2023-11-06 22:05:30,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2023-11-06 22:05:30,955 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 67 [2023-11-06 22:05:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:30,955 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2023-11-06 22:05:30,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2641509433962264) internal successors, (120), 53 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:30,956 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2023-11-06 22:05:30,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-06 22:05:30,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:30,956 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:30,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:31,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-06 22:05:31,163 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:31,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:31,163 INFO L85 PathProgramCache]: Analyzing trace with hash 805871496, now seen corresponding path program 30 times [2023-11-06 22:05:31,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:31,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92307370] [2023-11-06 22:05:31,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:31,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 120 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:31,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:31,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92307370] [2023-11-06 22:05:31,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92307370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:31,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115949297] [2023-11-06 22:05:31,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:05:31,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:31,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:31,648 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:31,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 22:05:31,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2023-11-06 22:05:31,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:31,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 22:05:31,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:31,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:32,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115949297] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:32,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:32,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 22 [2023-11-06 22:05:32,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888753618] [2023-11-06 22:05:32,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:32,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:05:32,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:32,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:05:32,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:05:32,248 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:32,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:32,553 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2023-11-06 22:05:32,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 22:05:32,553 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 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 68 [2023-11-06 22:05:32,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:32,554 INFO L225 Difference]: With dead ends: 80 [2023-11-06 22:05:32,554 INFO L226 Difference]: Without dead ends: 78 [2023-11-06 22:05:32,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 117 SyntacticMatches, 32 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 22:05:32,555 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:32,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 33 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:32,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-06 22:05:32,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2023-11-06 22:05:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2023-11-06 22:05:32,576 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2023-11-06 22:05:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:32,576 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2023-11-06 22:05:32,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2023-11-06 22:05:32,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-06 22:05:32,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:32,577 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:32,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:32,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-06 22:05:32,783 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:32,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:32,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1144627023, now seen corresponding path program 31 times [2023-11-06 22:05:32,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:32,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106861235] [2023-11-06 22:05:32,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:32,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:33,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:33,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106861235] [2023-11-06 22:05:33,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106861235] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:33,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855530813] [2023-11-06 22:05:33,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:05:33,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:33,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:33,665 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:33,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 22:05:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:33,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:05:33,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:34,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:35,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855530813] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:35,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:35,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2023-11-06 22:05:35,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561270317] [2023-11-06 22:05:35,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:35,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-06 22:05:35,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:35,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-06 22:05:35,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=2373, Unknown=0, NotChecked=0, Total=3080 [2023-11-06 22:05:35,116 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:35,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:35,635 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2023-11-06 22:05:35,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:05:35,635 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-06 22:05:35,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:35,636 INFO L225 Difference]: With dead ends: 128 [2023-11-06 22:05:35,636 INFO L226 Difference]: Without dead ends: 73 [2023-11-06 22:05:35,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 90 SyntacticMatches, 33 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1223, Invalid=4179, Unknown=0, NotChecked=0, Total=5402 [2023-11-06 22:05:35,637 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:35,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 177 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:05:35,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-06 22:05:35,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-06 22:05:35,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:35,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2023-11-06 22:05:35,651 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 71 [2023-11-06 22:05:35,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:35,652 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2023-11-06 22:05:35,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.267857142857143) internal successors, (127), 56 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:35,652 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2023-11-06 22:05:35,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-06 22:05:35,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:35,653 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:35,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:35,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-06 22:05:35,858 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:35,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:35,859 INFO L85 PathProgramCache]: Analyzing trace with hash -960340244, now seen corresponding path program 32 times [2023-11-06 22:05:35,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:35,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641087891] [2023-11-06 22:05:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:35,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 136 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:36,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:36,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641087891] [2023-11-06 22:05:36,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641087891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:36,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636756143] [2023-11-06 22:05:36,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:05:36,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:36,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:36,382 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:36,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-06 22:05:36,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:05:36,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:36,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 22:05:36,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:36,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:37,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636756143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:37,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:37,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2023-11-06 22:05:37,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718098679] [2023-11-06 22:05:37,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:37,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:05:37,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:37,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:05:37,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:05:37,031 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:37,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:37,321 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2023-11-06 22:05:37,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 22:05:37,322 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-11-06 22:05:37,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:37,323 INFO L225 Difference]: With dead ends: 84 [2023-11-06 22:05:37,323 INFO L226 Difference]: Without dead ends: 82 [2023-11-06 22:05:37,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 124 SyntacticMatches, 34 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:05:37,324 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:37,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 31 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:37,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-06 22:05:37,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2023-11-06 22:05:37,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:37,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2023-11-06 22:05:37,335 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 72 [2023-11-06 22:05:37,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:37,335 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2023-11-06 22:05:37,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:37,336 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2023-11-06 22:05:37,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-06 22:05:37,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:37,336 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:37,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:37,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-06 22:05:37,542 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:37,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:37,543 INFO L85 PathProgramCache]: Analyzing trace with hash -714230067, now seen corresponding path program 33 times [2023-11-06 22:05:37,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:37,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421540573] [2023-11-06 22:05:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:37,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 393 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:38,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:38,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421540573] [2023-11-06 22:05:38,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421540573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:38,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798033761] [2023-11-06 22:05:38,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:05:38,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:38,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:38,467 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:38,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-06 22:05:38,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-11-06 22:05:38,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:38,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 22:05:38,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:39,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:40,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798033761] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:40,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:40,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2023-11-06 22:05:40,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859337824] [2023-11-06 22:05:40,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:40,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-06 22:05:40,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:40,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-06 22:05:40,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=2638, Unknown=0, NotChecked=0, Total=3422 [2023-11-06 22:05:40,052 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:40,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:40,675 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2023-11-06 22:05:40,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 22:05:40,675 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-11-06 22:05:40,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:40,676 INFO L225 Difference]: With dead ends: 135 [2023-11-06 22:05:40,676 INFO L226 Difference]: Without dead ends: 77 [2023-11-06 22:05:40,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 95 SyntacticMatches, 35 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1357, Invalid=4649, Unknown=0, NotChecked=0, Total=6006 [2023-11-06 22:05:40,678 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:40,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 222 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:05:40,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-06 22:05:40,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-06 22:05:40,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:40,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2023-11-06 22:05:40,693 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 75 [2023-11-06 22:05:40,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:40,694 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2023-11-06 22:05:40,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 59 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:40,694 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2023-11-06 22:05:40,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-06 22:05:40,695 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:40,695 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:40,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:40,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:40,900 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:40,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:40,900 INFO L85 PathProgramCache]: Analyzing trace with hash -377872504, now seen corresponding path program 34 times [2023-11-06 22:05:40,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:40,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132831283] [2023-11-06 22:05:40,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:40,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 153 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:41,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:41,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132831283] [2023-11-06 22:05:41,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132831283] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:41,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272522876] [2023-11-06 22:05:41,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:05:41,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:41,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:41,464 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:41,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-06 22:05:41,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:05:41,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:41,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 22:05:41,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:41,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:42,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272522876] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:42,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:42,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 24 [2023-11-06 22:05:42,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564993875] [2023-11-06 22:05:42,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:42,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:05:42,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:42,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:05:42,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:05:42,169 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:42,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:42,460 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2023-11-06 22:05:42,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-06 22:05:42,461 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 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 76 [2023-11-06 22:05:42,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:42,462 INFO L225 Difference]: With dead ends: 88 [2023-11-06 22:05:42,462 INFO L226 Difference]: Without dead ends: 86 [2023-11-06 22:05:42,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 131 SyntacticMatches, 36 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2023-11-06 22:05:42,463 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:42,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 33 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:42,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-06 22:05:42,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2023-11-06 22:05:42,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:42,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2023-11-06 22:05:42,475 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2023-11-06 22:05:42,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:42,475 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2023-11-06 22:05:42,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:42,475 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2023-11-06 22:05:42,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-06 22:05:42,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:42,476 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:42,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:42,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:42,680 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:42,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:42,680 INFO L85 PathProgramCache]: Analyzing trace with hash -85663567, now seen corresponding path program 35 times [2023-11-06 22:05:42,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:42,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56748861] [2023-11-06 22:05:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:42,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 443 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:43,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:43,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56748861] [2023-11-06 22:05:43,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56748861] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:43,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081959883] [2023-11-06 22:05:43,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:05:43,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:43,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:43,564 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:43,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-06 22:05:43,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2023-11-06 22:05:43,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:43,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 22:05:43,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:44,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:45,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081959883] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:45,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:45,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 62 [2023-11-06 22:05:45,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910186933] [2023-11-06 22:05:45,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:45,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-06 22:05:45,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:45,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-06 22:05:45,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=2917, Unknown=0, NotChecked=0, Total=3782 [2023-11-06 22:05:45,216 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:45,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:45,856 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2023-11-06 22:05:45,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 22:05:45,856 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-11-06 22:05:45,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:45,857 INFO L225 Difference]: With dead ends: 142 [2023-11-06 22:05:45,857 INFO L226 Difference]: Without dead ends: 81 [2023-11-06 22:05:45,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 100 SyntacticMatches, 37 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2791 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2023-11-06 22:05:45,859 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:45,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 213 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:05:45,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-06 22:05:45,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-06 22:05:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:45,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2023-11-06 22:05:45,875 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 79 [2023-11-06 22:05:45,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:45,876 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2023-11-06 22:05:45,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.274193548387097) internal successors, (141), 62 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:45,876 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2023-11-06 22:05:45,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-06 22:05:45,877 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:45,877 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:45,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:46,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-06 22:05:46,083 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:46,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:46,083 INFO L85 PathProgramCache]: Analyzing trace with hash -322407444, now seen corresponding path program 36 times [2023-11-06 22:05:46,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:46,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330159667] [2023-11-06 22:05:46,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:46,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 171 proven. 514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:46,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:46,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330159667] [2023-11-06 22:05:46,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330159667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:46,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659641048] [2023-11-06 22:05:46,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:05:46,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:46,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:46,690 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:46,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-06 22:05:46,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-11-06 22:05:46,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:46,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 22:05:46,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:46,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:47,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659641048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:47,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:47,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 25 [2023-11-06 22:05:47,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678058426] [2023-11-06 22:05:47,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:47,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:05:47,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:47,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:05:47,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:05:47,423 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:47,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:47,751 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2023-11-06 22:05:47,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-06 22:05:47,751 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 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 80 [2023-11-06 22:05:47,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:47,752 INFO L225 Difference]: With dead ends: 92 [2023-11-06 22:05:47,752 INFO L226 Difference]: Without dead ends: 90 [2023-11-06 22:05:47,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 138 SyntacticMatches, 38 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 22:05:47,753 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:47,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 38 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:47,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-06 22:05:47,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2023-11-06 22:05:47,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 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) [2023-11-06 22:05:47,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2023-11-06 22:05:47,771 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 80 [2023-11-06 22:05:47,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:47,771 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2023-11-06 22:05:47,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:47,772 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2023-11-06 22:05:47,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-06 22:05:47,772 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:47,772 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:47,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:47,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-06 22:05:47,978 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:47,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:47,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1288470067, now seen corresponding path program 37 times [2023-11-06 22:05:47,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:47,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797907800] [2023-11-06 22:05:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:47,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 496 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:49,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:49,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797907800] [2023-11-06 22:05:49,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797907800] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:49,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276638795] [2023-11-06 22:05:49,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:05:49,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:49,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:49,025 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:49,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-06 22:05:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:49,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 22:05:49,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:50,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:50,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276638795] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:50,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:50,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2023-11-06 22:05:50,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391022075] [2023-11-06 22:05:50,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:50,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-06 22:05:50,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:50,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-06 22:05:50,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=3210, Unknown=0, NotChecked=0, Total=4160 [2023-11-06 22:05:50,793 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:51,451 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2023-11-06 22:05:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-06 22:05:51,451 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 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 83 [2023-11-06 22:05:51,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:51,452 INFO L225 Difference]: With dead ends: 149 [2023-11-06 22:05:51,452 INFO L226 Difference]: Without dead ends: 85 [2023-11-06 22:05:51,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 105 SyntacticMatches, 39 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3079 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1646, Invalid=5664, Unknown=0, NotChecked=0, Total=7310 [2023-11-06 22:05:51,454 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:51,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 214 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:05:51,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-06 22:05:51,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-11-06 22:05:51,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:51,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2023-11-06 22:05:51,472 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2023-11-06 22:05:51,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:51,472 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2023-11-06 22:05:51,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.276923076923077) internal successors, (148), 65 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:51,473 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2023-11-06 22:05:51,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-06 22:05:51,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:51,474 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:51,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:51,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-06 22:05:51,679 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:51,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:51,679 INFO L85 PathProgramCache]: Analyzing trace with hash 374669192, now seen corresponding path program 38 times [2023-11-06 22:05:51,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:51,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544399110] [2023-11-06 22:05:51,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:51,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 190 proven. 571 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:52,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:52,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544399110] [2023-11-06 22:05:52,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544399110] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:52,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242527405] [2023-11-06 22:05:52,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:05:52,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:52,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:52,338 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:52,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-06 22:05:52,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:05:52,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:52,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 22:05:52,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:52,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:53,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242527405] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:53,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:53,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2023-11-06 22:05:53,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88569591] [2023-11-06 22:05:53,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:53,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:05:53,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:53,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:05:53,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:05:53,098 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:53,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:53,451 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2023-11-06 22:05:53,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 22:05:53,452 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 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 84 [2023-11-06 22:05:53,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:53,453 INFO L225 Difference]: With dead ends: 96 [2023-11-06 22:05:53,453 INFO L226 Difference]: Without dead ends: 94 [2023-11-06 22:05:53,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 145 SyntacticMatches, 40 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=785, Invalid=1377, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 22:05:53,454 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:53,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 37 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-06 22:05:53,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2023-11-06 22:05:53,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:53,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2023-11-06 22:05:53,474 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 84 [2023-11-06 22:05:53,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:53,474 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2023-11-06 22:05:53,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:53,475 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2023-11-06 22:05:53,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-06 22:05:53,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:53,475 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:53,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:53,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-06 22:05:53,681 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:53,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:53,681 INFO L85 PathProgramCache]: Analyzing trace with hash -845283151, now seen corresponding path program 39 times [2023-11-06 22:05:53,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:53,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803756383] [2023-11-06 22:05:53,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:53,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:54,808 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 552 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:54,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:54,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803756383] [2023-11-06 22:05:54,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803756383] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:54,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644851581] [2023-11-06 22:05:54,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:05:54,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:54,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:54,810 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:54,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-06 22:05:54,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2023-11-06 22:05:54,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:54,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 22:05:54,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:55,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:56,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644851581] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:56,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:56,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 68 [2023-11-06 22:05:56,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004288612] [2023-11-06 22:05:56,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:56,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-11-06 22:05:56,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:56,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-11-06 22:05:56,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=3517, Unknown=0, NotChecked=0, Total=4556 [2023-11-06 22:05:56,737 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:57,454 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2023-11-06 22:05:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-06 22:05:57,455 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2023-11-06 22:05:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:57,456 INFO L225 Difference]: With dead ends: 156 [2023-11-06 22:05:57,456 INFO L226 Difference]: Without dead ends: 89 [2023-11-06 22:05:57,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 110 SyntacticMatches, 41 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3381 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1801, Invalid=6209, Unknown=0, NotChecked=0, Total=8010 [2023-11-06 22:05:57,457 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:57,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 259 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:05:57,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-06 22:05:57,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-11-06 22:05:57,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:57,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2023-11-06 22:05:57,473 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 87 [2023-11-06 22:05:57,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:57,474 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2023-11-06 22:05:57,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.2794117647058822) internal successors, (155), 68 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:57,474 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2023-11-06 22:05:57,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-06 22:05:57,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:57,475 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:57,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:57,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:57,681 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:57,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:57,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1543231252, now seen corresponding path program 40 times [2023-11-06 22:05:57,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:57,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584360859] [2023-11-06 22:05:57,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:57,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 210 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:58,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:58,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584360859] [2023-11-06 22:05:58,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584360859] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:58,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332299856] [2023-11-06 22:05:58,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:05:58,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:58,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:58,287 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:58,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-06 22:05:58,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:05:58,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:58,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 22:05:58,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:58,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:59,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332299856] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:59,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:59,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 27 [2023-11-06 22:05:59,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022362718] [2023-11-06 22:05:59,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:59,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:05:59,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:59,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:05:59,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:05:59,131 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:59,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:05:59,502 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2023-11-06 22:05:59,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 22:05:59,504 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 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 88 [2023-11-06 22:05:59,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:05:59,505 INFO L225 Difference]: With dead ends: 100 [2023-11-06 22:05:59,505 INFO L226 Difference]: Without dead ends: 98 [2023-11-06 22:05:59,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 152 SyntacticMatches, 42 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=855, Invalid=1497, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 22:05:59,506 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 48 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:05:59,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 27 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:05:59,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-06 22:05:59,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2023-11-06 22:05:59,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:59,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2023-11-06 22:05:59,525 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2023-11-06 22:05:59,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:05:59,525 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2023-11-06 22:05:59,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:59,525 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2023-11-06 22:05:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-06 22:05:59,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:05:59,526 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:59,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:59,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:59,733 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:05:59,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:59,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1067471667, now seen corresponding path program 41 times [2023-11-06 22:05:59,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:59,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963441155] [2023-11-06 22:05:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:59,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 611 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:00,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:00,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963441155] [2023-11-06 22:06:00,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963441155] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:00,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22182366] [2023-11-06 22:06:00,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:06:00,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:00,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:00,812 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:00,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-06 22:06:00,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-11-06 22:06:00,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:06:00,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 22:06:00,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:02,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:02,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22182366] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:02,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:06:02,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 71 [2023-11-06 22:06:02,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957323257] [2023-11-06 22:06:02,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:02,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-06 22:06:02,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:02,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-06 22:06:02,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=3838, Unknown=0, NotChecked=0, Total=4970 [2023-11-06 22:06:02,874 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:03,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:03,657 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2023-11-06 22:06:03,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-06 22:06:03,658 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2023-11-06 22:06:03,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:03,658 INFO L225 Difference]: With dead ends: 163 [2023-11-06 22:06:03,659 INFO L226 Difference]: Without dead ends: 93 [2023-11-06 22:06:03,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 115 SyntacticMatches, 43 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3697 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1963, Invalid=6779, Unknown=0, NotChecked=0, Total=8742 [2023-11-06 22:06:03,660 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:03,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 280 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:06:03,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-06 22:06:03,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-11-06 22:06:03,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:03,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2023-11-06 22:06:03,681 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2023-11-06 22:06:03,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:03,681 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2023-11-06 22:06:03,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 71 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:03,682 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2023-11-06 22:06:03,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-06 22:06:03,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:03,683 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:03,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-06 22:06:03,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:03,889 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:03,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:03,889 INFO L85 PathProgramCache]: Analyzing trace with hash 716259208, now seen corresponding path program 42 times [2023-11-06 22:06:03,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:03,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089282457] [2023-11-06 22:06:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:03,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:04,511 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 231 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:04,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:04,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089282457] [2023-11-06 22:06:04,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089282457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:04,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163746987] [2023-11-06 22:06:04,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:06:04,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:04,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:04,513 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:04,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-06 22:06:04,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2023-11-06 22:06:04,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:06:04,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 22:06:04,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:04,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:05,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163746987] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:05,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:06:05,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 28 [2023-11-06 22:06:05,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72760997] [2023-11-06 22:06:05,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:05,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:06:05,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:05,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:06:05,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:06:05,368 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:05,779 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2023-11-06 22:06:05,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-06 22:06:05,779 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 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 92 [2023-11-06 22:06:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:05,780 INFO L225 Difference]: With dead ends: 104 [2023-11-06 22:06:05,780 INFO L226 Difference]: Without dead ends: 102 [2023-11-06 22:06:05,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 159 SyntacticMatches, 44 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=928, Invalid=1622, Unknown=0, NotChecked=0, Total=2550 [2023-11-06 22:06:05,781 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:05,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 29 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:06:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-06 22:06:05,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2023-11-06 22:06:05,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:05,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2023-11-06 22:06:05,801 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2023-11-06 22:06:05,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:05,801 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2023-11-06 22:06:05,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:05,801 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2023-11-06 22:06:05,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-06 22:06:05,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:05,802 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:05,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:06,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:06,007 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:06,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:06,008 INFO L85 PathProgramCache]: Analyzing trace with hash 685359281, now seen corresponding path program 43 times [2023-11-06 22:06:06,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:06,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869882645] [2023-11-06 22:06:06,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:06,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 673 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:07,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:07,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869882645] [2023-11-06 22:06:07,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869882645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:07,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051918621] [2023-11-06 22:06:07,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:06:07,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:07,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:07,146 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:07,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-06 22:06:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:07,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 22:06:07,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:08,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:09,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051918621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:09,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:06:09,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 74 [2023-11-06 22:06:09,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398761576] [2023-11-06 22:06:09,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:09,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-11-06 22:06:09,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:09,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-11-06 22:06:09,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=4173, Unknown=0, NotChecked=0, Total=5402 [2023-11-06 22:06:09,416 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:10,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:10,252 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2023-11-06 22:06:10,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-06 22:06:10,252 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 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 95 [2023-11-06 22:06:10,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:10,253 INFO L225 Difference]: With dead ends: 170 [2023-11-06 22:06:10,253 INFO L226 Difference]: Without dead ends: 97 [2023-11-06 22:06:10,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 120 SyntacticMatches, 45 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4027 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2132, Invalid=7374, Unknown=0, NotChecked=0, Total=9506 [2023-11-06 22:06:10,254 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:10,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 319 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:06:10,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-06 22:06:10,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-11-06 22:06:10,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2023-11-06 22:06:10,269 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 95 [2023-11-06 22:06:10,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:10,270 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2023-11-06 22:06:10,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2837837837837838) internal successors, (169), 74 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2023-11-06 22:06:10,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-06 22:06:10,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:10,270 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:10,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-11-06 22:06:10,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:10,471 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:10,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:10,471 INFO L85 PathProgramCache]: Analyzing trace with hash 375225836, now seen corresponding path program 44 times [2023-11-06 22:06:10,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:10,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615400409] [2023-11-06 22:06:10,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:10,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 253 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:11,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:11,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615400409] [2023-11-06 22:06:11,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615400409] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:11,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187390293] [2023-11-06 22:06:11,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:06:11,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:11,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:11,193 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:11,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-06 22:06:11,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:06:11,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:06:11,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-06 22:06:11,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:11,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:12,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187390293] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:12,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:06:12,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 29 [2023-11-06 22:06:12,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958571567] [2023-11-06 22:06:12,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:12,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:06:12,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:12,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:06:12,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:06:12,077 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:12,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:12,490 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2023-11-06 22:06:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-06 22:06:12,491 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 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 96 [2023-11-06 22:06:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:12,491 INFO L225 Difference]: With dead ends: 108 [2023-11-06 22:06:12,491 INFO L226 Difference]: Without dead ends: 106 [2023-11-06 22:06:12,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 166 SyntacticMatches, 46 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1004, Invalid=1752, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 22:06:12,492 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:12,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:06:12,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-06 22:06:12,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2023-11-06 22:06:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2023-11-06 22:06:12,511 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 96 [2023-11-06 22:06:12,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:12,512 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2023-11-06 22:06:12,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2023-11-06 22:06:12,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-06 22:06:12,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:12,512 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:12,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-06 22:06:12,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-06 22:06:12,713 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:12,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:12,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1442170931, now seen corresponding path program 45 times [2023-11-06 22:06:12,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:12,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248764470] [2023-11-06 22:06:12,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:12,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 738 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:13,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:13,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248764470] [2023-11-06 22:06:13,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248764470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:13,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882308722] [2023-11-06 22:06:13,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:06:13,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:13,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:13,928 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:13,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-06 22:06:14,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-11-06 22:06:14,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:06:14,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 22:06:14,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:15,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:16,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882308722] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:16,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:06:16,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 77 [2023-11-06 22:06:16,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733945191] [2023-11-06 22:06:16,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:16,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-11-06 22:06:16,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:16,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-11-06 22:06:16,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=4522, Unknown=0, NotChecked=0, Total=5852 [2023-11-06 22:06:16,262 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:17,146 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2023-11-06 22:06:17,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-06 22:06:17,146 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2023-11-06 22:06:17,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:17,147 INFO L225 Difference]: With dead ends: 177 [2023-11-06 22:06:17,147 INFO L226 Difference]: Without dead ends: 101 [2023-11-06 22:06:17,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 125 SyntacticMatches, 47 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4371 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2308, Invalid=7994, Unknown=0, NotChecked=0, Total=10302 [2023-11-06 22:06:17,149 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:17,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 293 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:06:17,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-06 22:06:17,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-11-06 22:06:17,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:17,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2023-11-06 22:06:17,167 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 99 [2023-11-06 22:06:17,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:17,167 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2023-11-06 22:06:17,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:17,168 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2023-11-06 22:06:17,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-06 22:06:17,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:17,169 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:17,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:17,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-06 22:06:17,375 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:17,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:17,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2002329720, now seen corresponding path program 46 times [2023-11-06 22:06:17,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:17,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573456844] [2023-11-06 22:06:17,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:17,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 276 proven. 829 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:18,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:18,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573456844] [2023-11-06 22:06:18,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573456844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:18,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791927690] [2023-11-06 22:06:18,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:06:18,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:18,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:18,060 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:18,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-06 22:06:18,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:06:18,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:06:18,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-06 22:06:18,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:18,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:18,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791927690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:18,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:06:18,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 30 [2023-11-06 22:06:18,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781401671] [2023-11-06 22:06:18,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:18,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 22:06:18,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:18,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 22:06:18,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2023-11-06 22:06:18,973 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:19,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:19,419 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2023-11-06 22:06:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-06 22:06:19,420 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 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 100 [2023-11-06 22:06:19,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:19,421 INFO L225 Difference]: With dead ends: 112 [2023-11-06 22:06:19,421 INFO L226 Difference]: Without dead ends: 110 [2023-11-06 22:06:19,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 173 SyntacticMatches, 48 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1887, Unknown=0, NotChecked=0, Total=2970 [2023-11-06 22:06:19,422 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:19,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:06:19,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-06 22:06:19,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2023-11-06 22:06:19,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:19,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2023-11-06 22:06:19,440 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 100 [2023-11-06 22:06:19,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:19,440 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2023-11-06 22:06:19,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:19,440 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2023-11-06 22:06:19,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-06 22:06:19,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:19,441 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:19,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:19,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-06 22:06:19,641 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:19,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:19,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1400905905, now seen corresponding path program 47 times [2023-11-06 22:06:19,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:19,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482092465] [2023-11-06 22:06:19,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:19,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 806 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:20,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:20,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482092465] [2023-11-06 22:06:20,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482092465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:20,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105809259] [2023-11-06 22:06:20,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:06:20,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:20,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:20,951 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:20,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-06 22:06:21,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2023-11-06 22:06:21,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:06:21,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-06 22:06:21,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:22,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:23,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105809259] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:23,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:06:23,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 80 [2023-11-06 22:06:23,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855971627] [2023-11-06 22:06:23,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:23,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-11-06 22:06:23,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:23,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-11-06 22:06:23,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=4885, Unknown=0, NotChecked=0, Total=6320 [2023-11-06 22:06:23,427 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:24,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:24,408 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2023-11-06 22:06:24,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-06 22:06:24,412 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-11-06 22:06:24,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:24,413 INFO L225 Difference]: With dead ends: 184 [2023-11-06 22:06:24,413 INFO L226 Difference]: Without dead ends: 105 [2023-11-06 22:06:24,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 130 SyntacticMatches, 49 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4729 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2491, Invalid=8639, Unknown=0, NotChecked=0, Total=11130 [2023-11-06 22:06:24,415 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:24,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 342 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:06:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-06 22:06:24,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-11-06 22:06:24,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:24,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2023-11-06 22:06:24,441 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 103 [2023-11-06 22:06:24,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:24,441 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2023-11-06 22:06:24,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.2875) internal successors, (183), 80 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:24,442 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2023-11-06 22:06:24,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-06 22:06:24,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:24,442 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:24,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:24,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-06 22:06:24,648 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:24,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:24,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1078168852, now seen corresponding path program 48 times [2023-11-06 22:06:24,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:24,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402936673] [2023-11-06 22:06:24,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:24,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 300 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:25,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:25,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402936673] [2023-11-06 22:06:25,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402936673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:25,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377309641] [2023-11-06 22:06:25,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:06:25,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:25,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:25,392 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:25,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-06 22:06:25,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2023-11-06 22:06:25,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:06:25,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-06 22:06:25,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:25,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:26,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377309641] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:26,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:06:26,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 31 [2023-11-06 22:06:26,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277413199] [2023-11-06 22:06:26,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:26,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 22:06:26,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:26,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 22:06:26,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:06:26,374 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:26,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:26,834 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2023-11-06 22:06:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-06 22:06:26,834 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2023-11-06 22:06:26,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:26,836 INFO L225 Difference]: With dead ends: 116 [2023-11-06 22:06:26,836 INFO L226 Difference]: Without dead ends: 114 [2023-11-06 22:06:26,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 180 SyntacticMatches, 50 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1165, Invalid=2027, Unknown=0, NotChecked=0, Total=3192 [2023-11-06 22:06:26,837 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:26,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 35 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:06:26,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-06 22:06:26,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2023-11-06 22:06:26,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:26,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2023-11-06 22:06:26,862 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2023-11-06 22:06:26,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:26,863 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2023-11-06 22:06:26,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:26,863 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2023-11-06 22:06:26,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-06 22:06:26,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:26,864 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:26,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:27,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-06 22:06:27,070 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:27,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:27,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1958010163, now seen corresponding path program 49 times [2023-11-06 22:06:27,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:27,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433632248] [2023-11-06 22:06:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:27,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 877 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:28,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:28,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433632248] [2023-11-06 22:06:28,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433632248] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:28,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008619031] [2023-11-06 22:06:28,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:06:28,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:28,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:28,507 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:28,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-06 22:06:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:28,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-06 22:06:28,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:30,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:30,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:31,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008619031] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:31,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:06:31,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 83 [2023-11-06 22:06:31,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238792606] [2023-11-06 22:06:31,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:31,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-11-06 22:06:31,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:31,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-11-06 22:06:31,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=5262, Unknown=0, NotChecked=0, Total=6806 [2023-11-06 22:06:31,259 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:32,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:32,297 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2023-11-06 22:06:32,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-06 22:06:32,297 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 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 107 [2023-11-06 22:06:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:32,298 INFO L225 Difference]: With dead ends: 191 [2023-11-06 22:06:32,298 INFO L226 Difference]: Without dead ends: 109 [2023-11-06 22:06:32,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 135 SyntacticMatches, 51 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5101 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2681, Invalid=9309, Unknown=0, NotChecked=0, Total=11990 [2023-11-06 22:06:32,300 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:32,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 334 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:06:32,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-06 22:06:32,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-11-06 22:06:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2023-11-06 22:06:32,328 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 107 [2023-11-06 22:06:32,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:32,328 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2023-11-06 22:06:32,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.289156626506024) internal successors, (190), 83 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:32,328 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2023-11-06 22:06:32,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-06 22:06:32,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:32,329 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:32,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:32,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:32,532 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:32,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:32,532 INFO L85 PathProgramCache]: Analyzing trace with hash 5103496, now seen corresponding path program 50 times [2023-11-06 22:06:32,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:32,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833909700] [2023-11-06 22:06:32,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:32,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 325 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:33,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:33,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833909700] [2023-11-06 22:06:33,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833909700] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:33,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769878502] [2023-11-06 22:06:33,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:06:33,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:33,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:33,333 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:33,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-06 22:06:33,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:06:33,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:06:33,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-06 22:06:33,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:33,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:34,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769878502] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:34,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:06:34,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 32 [2023-11-06 22:06:34,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292428817] [2023-11-06 22:06:34,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:34,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:06:34,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:34,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:06:34,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:06:34,346 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:34,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:34,817 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2023-11-06 22:06:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-06 22:06:34,817 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 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 108 [2023-11-06 22:06:34,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:34,818 INFO L225 Difference]: With dead ends: 120 [2023-11-06 22:06:34,818 INFO L226 Difference]: Without dead ends: 118 [2023-11-06 22:06:34,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 187 SyntacticMatches, 52 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1250, Invalid=2172, Unknown=0, NotChecked=0, Total=3422 [2023-11-06 22:06:34,821 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:34,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 30 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:06:34,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-06 22:06:34,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2023-11-06 22:06:34,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:34,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2023-11-06 22:06:34,848 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 108 [2023-11-06 22:06:34,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:34,848 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2023-11-06 22:06:34,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:34,849 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2023-11-06 22:06:34,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-06 22:06:34,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:34,849 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:34,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-06 22:06:35,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:35,052 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:35,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:35,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1719214257, now seen corresponding path program 51 times [2023-11-06 22:06:35,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:35,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564450275] [2023-11-06 22:06:35,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:35,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 951 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:36,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:36,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564450275] [2023-11-06 22:06:36,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564450275] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:36,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122545983] [2023-11-06 22:06:36,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:06:36,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:36,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:36,548 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:36,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-06 22:06:36,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2023-11-06 22:06:36,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:06:36,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-06 22:06:36,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:38,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:39,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122545983] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:39,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:06:39,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 86 [2023-11-06 22:06:39,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937865306] [2023-11-06 22:06:39,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:39,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-11-06 22:06:39,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:39,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-11-06 22:06:39,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=5653, Unknown=0, NotChecked=0, Total=7310 [2023-11-06 22:06:39,451 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:40,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:40,533 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2023-11-06 22:06:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-06 22:06:40,534 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2023-11-06 22:06:40,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:40,534 INFO L225 Difference]: With dead ends: 198 [2023-11-06 22:06:40,535 INFO L226 Difference]: Without dead ends: 113 [2023-11-06 22:06:40,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 140 SyntacticMatches, 53 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5487 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2878, Invalid=10004, Unknown=0, NotChecked=0, Total=12882 [2023-11-06 22:06:40,536 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:40,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 359 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:06:40,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-06 22:06:40,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-11-06 22:06:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:40,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2023-11-06 22:06:40,566 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 111 [2023-11-06 22:06:40,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:40,566 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2023-11-06 22:06:40,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 86 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:40,567 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2023-11-06 22:06:40,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-06 22:06:40,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:40,567 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:40,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:40,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-11-06 22:06:40,773 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:40,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:40,773 INFO L85 PathProgramCache]: Analyzing trace with hash -301398036, now seen corresponding path program 52 times [2023-11-06 22:06:40,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:40,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123131345] [2023-11-06 22:06:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:40,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 351 proven. 1054 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:41,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:41,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123131345] [2023-11-06 22:06:41,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123131345] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:41,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300022492] [2023-11-06 22:06:41,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:06:41,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:41,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:41,599 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:41,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-06 22:06:41,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:06:41,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:06:41,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-06 22:06:41,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:41,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:42,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300022492] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:42,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:06:42,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 33 [2023-11-06 22:06:42,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141238140] [2023-11-06 22:06:42,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:42,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 22:06:42,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:42,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 22:06:42,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:06:42,653 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:43,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:43,167 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2023-11-06 22:06:43,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-06 22:06:43,168 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2023-11-06 22:06:43,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:43,169 INFO L225 Difference]: With dead ends: 124 [2023-11-06 22:06:43,169 INFO L226 Difference]: Without dead ends: 122 [2023-11-06 22:06:43,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 194 SyntacticMatches, 54 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1338, Invalid=2322, Unknown=0, NotChecked=0, Total=3660 [2023-11-06 22:06:43,170 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:43,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 36 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:06:43,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-06 22:06:43,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2023-11-06 22:06:43,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2023-11-06 22:06:43,200 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 112 [2023-11-06 22:06:43,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:43,200 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2023-11-06 22:06:43,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:43,200 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2023-11-06 22:06:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-06 22:06:43,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:43,201 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:43,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:43,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-11-06 22:06:43,408 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:43,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:43,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1832545741, now seen corresponding path program 53 times [2023-11-06 22:06:43,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:43,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221539532] [2023-11-06 22:06:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:43,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1028 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:45,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:45,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221539532] [2023-11-06 22:06:45,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221539532] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:45,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560818717] [2023-11-06 22:06:45,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:06:45,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:45,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:45,067 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:45,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-06 22:06:45,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2023-11-06 22:06:45,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:06:45,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-06 22:06:45,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:46,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:48,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560818717] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:48,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:06:48,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 89 [2023-11-06 22:06:48,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83969181] [2023-11-06 22:06:48,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:48,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-11-06 22:06:48,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:48,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-11-06 22:06:48,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=6058, Unknown=0, NotChecked=0, Total=7832 [2023-11-06 22:06:48,079 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:49,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:49,210 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2023-11-06 22:06:49,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-06 22:06:49,210 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2023-11-06 22:06:49,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:49,211 INFO L225 Difference]: With dead ends: 205 [2023-11-06 22:06:49,211 INFO L226 Difference]: Without dead ends: 117 [2023-11-06 22:06:49,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 145 SyntacticMatches, 55 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5887 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3082, Invalid=10724, Unknown=0, NotChecked=0, Total=13806 [2023-11-06 22:06:49,212 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:49,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 362 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:06:49,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-06 22:06:49,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-11-06 22:06:49,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:49,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2023-11-06 22:06:49,237 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 115 [2023-11-06 22:06:49,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:49,238 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2023-11-06 22:06:49,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.292134831460674) internal successors, (204), 89 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:49,238 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2023-11-06 22:06:49,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-06 22:06:49,239 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:49,239 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:49,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:49,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-11-06 22:06:49,445 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:49,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:49,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1337868168, now seen corresponding path program 54 times [2023-11-06 22:06:49,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:49,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422948983] [2023-11-06 22:06:49,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:49,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 378 proven. 1135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:50,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:50,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422948983] [2023-11-06 22:06:50,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422948983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:50,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799939366] [2023-11-06 22:06:50,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:06:50,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:50,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:50,398 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:50,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-06 22:06:50,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2023-11-06 22:06:50,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:06:50,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-06 22:06:50,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:50,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:51,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799939366] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:51,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:06:51,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 34 [2023-11-06 22:06:51,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692330237] [2023-11-06 22:06:51,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:51,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 22:06:51,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:51,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 22:06:51,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:06:51,554 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:52,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:52,090 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2023-11-06 22:06:52,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-06 22:06:52,091 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 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 116 [2023-11-06 22:06:52,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:52,092 INFO L225 Difference]: With dead ends: 128 [2023-11-06 22:06:52,092 INFO L226 Difference]: Without dead ends: 126 [2023-11-06 22:06:52,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 201 SyntacticMatches, 56 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1429, Invalid=2477, Unknown=0, NotChecked=0, Total=3906 [2023-11-06 22:06:52,093 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:52,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 33 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:06:52,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-06 22:06:52,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2023-11-06 22:06:52,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:52,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2023-11-06 22:06:52,126 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2023-11-06 22:06:52,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:52,126 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2023-11-06 22:06:52,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:52,127 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2023-11-06 22:06:52,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-06 22:06:52,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:52,128 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:52,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:52,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-11-06 22:06:52,334 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:52,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:52,334 INFO L85 PathProgramCache]: Analyzing trace with hash -861093711, now seen corresponding path program 55 times [2023-11-06 22:06:52,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:52,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171563542] [2023-11-06 22:06:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:52,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1108 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:54,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:54,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171563542] [2023-11-06 22:06:54,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171563542] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:54,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160488566] [2023-11-06 22:06:54,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:06:54,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:54,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:54,032 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:54,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-06 22:06:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:54,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-06 22:06:54,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:55,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:57,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160488566] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:57,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:06:57,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 92 [2023-11-06 22:06:57,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732436380] [2023-11-06 22:06:57,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:57,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-11-06 22:06:57,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:57,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-11-06 22:06:57,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1895, Invalid=6477, Unknown=0, NotChecked=0, Total=8372 [2023-11-06 22:06:57,187 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:58,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:58,304 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2023-11-06 22:06:58,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-06 22:06:58,304 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2023-11-06 22:06:58,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:58,305 INFO L225 Difference]: With dead ends: 212 [2023-11-06 22:06:58,305 INFO L226 Difference]: Without dead ends: 121 [2023-11-06 22:06:58,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 150 SyntacticMatches, 57 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6301 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3293, Invalid=11469, Unknown=0, NotChecked=0, Total=14762 [2023-11-06 22:06:58,306 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:58,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 299 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:06:58,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-06 22:06:58,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-11-06 22:06:58,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:58,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2023-11-06 22:06:58,335 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 119 [2023-11-06 22:06:58,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:58,335 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2023-11-06 22:06:58,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.2934782608695654) internal successors, (211), 92 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:58,335 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2023-11-06 22:06:58,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-06 22:06:58,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:58,336 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:58,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:58,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:58,537 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:58,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:58,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1093352684, now seen corresponding path program 56 times [2023-11-06 22:06:58,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:58,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547699887] [2023-11-06 22:06:58,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:58,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 406 proven. 1219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:59,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:59,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547699887] [2023-11-06 22:06:59,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547699887] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:59,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683291804] [2023-11-06 22:06:59,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:06:59,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:59,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:59,562 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:59,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-06 22:06:59,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:06:59,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:06:59,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-06 22:06:59,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:59,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:07:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:00,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683291804] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:07:00,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:07:00,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 35 [2023-11-06 22:07:00,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952145827] [2023-11-06 22:07:00,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:07:00,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 22:07:00,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:00,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 22:07:00,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:07:00,747 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:01,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:01,293 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2023-11-06 22:07:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-06 22:07:01,294 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 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 120 [2023-11-06 22:07:01,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:01,295 INFO L225 Difference]: With dead ends: 132 [2023-11-06 22:07:01,295 INFO L226 Difference]: Without dead ends: 130 [2023-11-06 22:07:01,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 208 SyntacticMatches, 58 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1523, Invalid=2637, Unknown=0, NotChecked=0, Total=4160 [2023-11-06 22:07:01,295 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 64 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:01,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 38 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:07:01,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-06 22:07:01,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2023-11-06 22:07:01,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2023-11-06 22:07:01,324 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 120 [2023-11-06 22:07:01,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:01,325 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2023-11-06 22:07:01,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:01,325 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2023-11-06 22:07:01,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-06 22:07:01,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:01,326 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:01,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-11-06 22:07:01,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-11-06 22:07:01,532 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:01,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:01,532 INFO L85 PathProgramCache]: Analyzing trace with hash -957343539, now seen corresponding path program 57 times [2023-11-06 22:07:01,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:01,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930367509] [2023-11-06 22:07:01,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:01,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1191 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:03,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:03,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930367509] [2023-11-06 22:07:03,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930367509] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:07:03,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809884721] [2023-11-06 22:07:03,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:07:03,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:03,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:03,365 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:03,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-06 22:07:03,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2023-11-06 22:07:03,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:07:03,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-06 22:07:03,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:05,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:07:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:06,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809884721] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:07:06,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:07:06,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 95 [2023-11-06 22:07:06,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251406474] [2023-11-06 22:07:06,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:07:06,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-11-06 22:07:06,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:06,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-11-06 22:07:06,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2020, Invalid=6910, Unknown=0, NotChecked=0, Total=8930 [2023-11-06 22:07:06,782 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:07,985 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2023-11-06 22:07:07,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-06 22:07:07,986 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2023-11-06 22:07:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:07,987 INFO L225 Difference]: With dead ends: 219 [2023-11-06 22:07:07,987 INFO L226 Difference]: Without dead ends: 125 [2023-11-06 22:07:07,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 155 SyntacticMatches, 59 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6729 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3511, Invalid=12239, Unknown=0, NotChecked=0, Total=15750 [2023-11-06 22:07:07,989 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:07,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 347 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:07:07,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-06 22:07:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-11-06 22:07:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2023-11-06 22:07:08,024 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 123 [2023-11-06 22:07:08,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:08,024 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2023-11-06 22:07:08,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.294736842105263) internal successors, (218), 95 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:08,025 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2023-11-06 22:07:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-06 22:07:08,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:08,026 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:08,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-11-06 22:07:08,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-06 22:07:08,231 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:08,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:08,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1559232632, now seen corresponding path program 58 times [2023-11-06 22:07:08,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:08,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982987450] [2023-11-06 22:07:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:08,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 435 proven. 1306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:09,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:09,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982987450] [2023-11-06 22:07:09,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982987450] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:07:09,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002437767] [2023-11-06 22:07:09,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:07:09,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:09,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:09,236 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:09,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-11-06 22:07:09,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:07:09,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:07:09,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-06 22:07:09,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:09,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:07:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:10,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002437767] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:07:10,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:07:10,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 36 [2023-11-06 22:07:10,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184022695] [2023-11-06 22:07:10,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:07:10,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 22:07:10,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:10,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 22:07:10,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 22:07:10,475 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:11,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:11,045 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2023-11-06 22:07:11,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-06 22:07:11,046 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2023-11-06 22:07:11,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:11,047 INFO L225 Difference]: With dead ends: 136 [2023-11-06 22:07:11,047 INFO L226 Difference]: Without dead ends: 134 [2023-11-06 22:07:11,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 215 SyntacticMatches, 60 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1620, Invalid=2802, Unknown=0, NotChecked=0, Total=4422 [2023-11-06 22:07:11,048 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:11,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 33 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:07:11,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-06 22:07:11,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2023-11-06 22:07:11,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2023-11-06 22:07:11,085 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2023-11-06 22:07:11,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:11,085 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2023-11-06 22:07:11,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:11,085 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2023-11-06 22:07:11,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-06 22:07:11,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:11,086 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:11,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-11-06 22:07:11,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:11,292 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:11,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:11,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1023213391, now seen corresponding path program 59 times [2023-11-06 22:07:11,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:11,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917189833] [2023-11-06 22:07:11,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:11,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1277 proven. 553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:13,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:13,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917189833] [2023-11-06 22:07:13,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917189833] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:07:13,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908074156] [2023-11-06 22:07:13,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:07:13,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:13,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:13,299 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:13,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-11-06 22:07:13,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2023-11-06 22:07:13,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:07:13,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-06 22:07:13,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:15,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:07:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:17,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908074156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:07:17,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:07:17,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 98 [2023-11-06 22:07:17,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796735891] [2023-11-06 22:07:17,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:07:17,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-11-06 22:07:17,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:17,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-11-06 22:07:17,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=7357, Unknown=0, NotChecked=0, Total=9506 [2023-11-06 22:07:17,017 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:18,346 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2023-11-06 22:07:18,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-06 22:07:18,346 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2023-11-06 22:07:18,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:18,347 INFO L225 Difference]: With dead ends: 226 [2023-11-06 22:07:18,347 INFO L226 Difference]: Without dead ends: 129 [2023-11-06 22:07:18,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 160 SyntacticMatches, 61 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7171 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3736, Invalid=13034, Unknown=0, NotChecked=0, Total=16770 [2023-11-06 22:07:18,348 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:18,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 403 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:07:18,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-06 22:07:18,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-11-06 22:07:18,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:18,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2023-11-06 22:07:18,385 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 127 [2023-11-06 22:07:18,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:18,385 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2023-11-06 22:07:18,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.295918367346939) internal successors, (225), 98 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2023-11-06 22:07:18,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-06 22:07:18,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:18,387 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:18,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-11-06 22:07:18,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:18,593 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:18,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:18,593 INFO L85 PathProgramCache]: Analyzing trace with hash 722145772, now seen corresponding path program 60 times [2023-11-06 22:07:18,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:18,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619632706] [2023-11-06 22:07:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:18,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 465 proven. 1396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:19,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:19,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619632706] [2023-11-06 22:07:19,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619632706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:07:19,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640859207] [2023-11-06 22:07:19,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:07:19,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:19,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:19,748 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:19,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-11-06 22:07:19,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2023-11-06 22:07:19,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:07:19,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-06 22:07:19,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:20,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:07:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:21,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640859207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:07:21,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:07:21,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 37 [2023-11-06 22:07:21,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389554419] [2023-11-06 22:07:21,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:07:21,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-06 22:07:21,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:21,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-06 22:07:21,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:07:21,172 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:21,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:21,767 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2023-11-06 22:07:21,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-06 22:07:21,767 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 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 128 [2023-11-06 22:07:21,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:21,768 INFO L225 Difference]: With dead ends: 140 [2023-11-06 22:07:21,768 INFO L226 Difference]: Without dead ends: 138 [2023-11-06 22:07:21,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 222 SyntacticMatches, 62 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1720, Invalid=2972, Unknown=0, NotChecked=0, Total=4692 [2023-11-06 22:07:21,769 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 68 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:21,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 30 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:07:21,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-06 22:07:21,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2023-11-06 22:07:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2023-11-06 22:07:21,794 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2023-11-06 22:07:21,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:21,794 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2023-11-06 22:07:21,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:21,794 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2023-11-06 22:07:21,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-06 22:07:21,795 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:21,795 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:21,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-11-06 22:07:21,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-11-06 22:07:21,996 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:21,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:21,996 INFO L85 PathProgramCache]: Analyzing trace with hash -41671731, now seen corresponding path program 61 times [2023-11-06 22:07:21,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:21,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838503977] [2023-11-06 22:07:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:21,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1366 proven. 587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:24,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:24,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838503977] [2023-11-06 22:07:24,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838503977] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:07:24,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495099401] [2023-11-06 22:07:24,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:07:24,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:24,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:24,097 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:24,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-06 22:07:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:24,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-06 22:07:24,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:26,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:07:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:27,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495099401] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:07:27,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:07:27,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 101 [2023-11-06 22:07:27,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624065380] [2023-11-06 22:07:27,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:07:27,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-06 22:07:27,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:27,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-06 22:07:27,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2282, Invalid=7818, Unknown=0, NotChecked=0, Total=10100 [2023-11-06 22:07:27,911 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:29,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:29,288 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2023-11-06 22:07:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-06 22:07:29,288 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 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 131 [2023-11-06 22:07:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:29,289 INFO L225 Difference]: With dead ends: 233 [2023-11-06 22:07:29,289 INFO L226 Difference]: Without dead ends: 133 [2023-11-06 22:07:29,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 165 SyntacticMatches, 63 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7627 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3968, Invalid=13854, Unknown=0, NotChecked=0, Total=17822 [2023-11-06 22:07:29,291 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:29,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 368 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:07:29,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-06 22:07:29,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2023-11-06 22:07:29,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:29,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2023-11-06 22:07:29,329 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 131 [2023-11-06 22:07:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:29,329 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2023-11-06 22:07:29,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.297029702970297) internal successors, (232), 101 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:29,330 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2023-11-06 22:07:29,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-06 22:07:29,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:29,331 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:29,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-11-06 22:07:29,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:29,537 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:29,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:29,537 INFO L85 PathProgramCache]: Analyzing trace with hash 341516168, now seen corresponding path program 62 times [2023-11-06 22:07:29,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:29,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869437427] [2023-11-06 22:07:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:29,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 496 proven. 1489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:30,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:30,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869437427] [2023-11-06 22:07:30,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869437427] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:07:30,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815264972] [2023-11-06 22:07:30,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:07:30,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:30,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:30,674 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:30,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-11-06 22:07:30,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:07:30,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:07:30,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-06 22:07:30,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:30,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:07:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:32,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815264972] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:07:32,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:07:32,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 38 [2023-11-06 22:07:32,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023667208] [2023-11-06 22:07:32,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:07:32,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-06 22:07:32,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:32,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-06 22:07:32,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 22:07:32,092 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:32,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:32,754 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2023-11-06 22:07:32,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-06 22:07:32,755 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-11-06 22:07:32,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:32,756 INFO L225 Difference]: With dead ends: 144 [2023-11-06 22:07:32,756 INFO L226 Difference]: Without dead ends: 142 [2023-11-06 22:07:32,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 229 SyntacticMatches, 64 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1823, Invalid=3147, Unknown=0, NotChecked=0, Total=4970 [2023-11-06 22:07:32,757 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:32,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 37 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:07:32,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-06 22:07:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2023-11-06 22:07:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2023-11-06 22:07:32,797 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 132 [2023-11-06 22:07:32,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:32,798 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2023-11-06 22:07:32,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:32,798 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2023-11-06 22:07:32,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-06 22:07:32,799 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:32,799 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:32,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-11-06 22:07:33,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:33,005 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:33,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:33,006 INFO L85 PathProgramCache]: Analyzing trace with hash -664543055, now seen corresponding path program 63 times [2023-11-06 22:07:33,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:33,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119535396] [2023-11-06 22:07:33,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:33,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1458 proven. 622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:35,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:35,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119535396] [2023-11-06 22:07:35,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119535396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:07:35,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160512983] [2023-11-06 22:07:35,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:07:35,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:35,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:35,266 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:35,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-11-06 22:07:35,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2023-11-06 22:07:35,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:07:35,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-06 22:07:35,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:37,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:07:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:39,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160512983] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:07:39,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:07:39,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 104 [2023-11-06 22:07:39,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108458758] [2023-11-06 22:07:39,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:07:39,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2023-11-06 22:07:39,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:39,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2023-11-06 22:07:39,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=8293, Unknown=0, NotChecked=0, Total=10712 [2023-11-06 22:07:39,419 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 104 states, 104 states have (on average 2.298076923076923) internal successors, (239), 104 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:40,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:40,881 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2023-11-06 22:07:40,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-06 22:07:40,882 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.298076923076923) internal successors, (239), 104 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2023-11-06 22:07:40,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:40,883 INFO L225 Difference]: With dead ends: 240 [2023-11-06 22:07:40,883 INFO L226 Difference]: Without dead ends: 137 [2023-11-06 22:07:40,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 170 SyntacticMatches, 65 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8097 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4207, Invalid=14699, Unknown=0, NotChecked=0, Total=18906 [2023-11-06 22:07:40,884 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:40,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 375 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:07:40,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-06 22:07:40,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-11-06 22:07:40,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:40,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2023-11-06 22:07:40,912 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 135 [2023-11-06 22:07:40,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:40,912 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2023-11-06 22:07:40,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.298076923076923) internal successors, (239), 104 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:40,912 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2023-11-06 22:07:40,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-06 22:07:40,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:40,913 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:40,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-11-06 22:07:41,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:41,116 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:41,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:41,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1871742700, now seen corresponding path program 64 times [2023-11-06 22:07:41,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:41,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405741241] [2023-11-06 22:07:41,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:41,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 528 proven. 1585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:42,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:42,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405741241] [2023-11-06 22:07:42,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405741241] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:07:42,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913235641] [2023-11-06 22:07:42,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:07:42,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:42,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:42,344 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:42,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-11-06 22:07:42,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:07:42,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:07:42,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-06 22:07:42,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:42,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:07:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:43,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913235641] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:07:43,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:07:43,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 39 [2023-11-06 22:07:43,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432291941] [2023-11-06 22:07:43,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:07:43,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-06 22:07:43,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:43,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-06 22:07:43,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 22:07:43,952 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:44,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:44,651 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2023-11-06 22:07:44,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-06 22:07:44,651 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 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 136 [2023-11-06 22:07:44,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:44,652 INFO L225 Difference]: With dead ends: 148 [2023-11-06 22:07:44,652 INFO L226 Difference]: Without dead ends: 146 [2023-11-06 22:07:44,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 236 SyntacticMatches, 66 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2469 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1929, Invalid=3327, Unknown=0, NotChecked=0, Total=5256 [2023-11-06 22:07:44,653 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 41 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:44,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 37 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:07:44,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-06 22:07:44,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2023-11-06 22:07:44,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:44,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2023-11-06 22:07:44,682 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 136 [2023-11-06 22:07:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:44,682 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2023-11-06 22:07:44,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:44,682 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2023-11-06 22:07:44,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-06 22:07:44,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:44,683 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:44,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2023-11-06 22:07:44,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:44,883 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:44,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:44,884 INFO L85 PathProgramCache]: Analyzing trace with hash -468807987, now seen corresponding path program 65 times [2023-11-06 22:07:44,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:44,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691910708] [2023-11-06 22:07:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:44,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1553 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:47,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:47,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691910708] [2023-11-06 22:07:47,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691910708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:07:47,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106371359] [2023-11-06 22:07:47,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:07:47,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:47,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:47,256 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:47,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-11-06 22:07:47,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2023-11-06 22:07:47,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:07:47,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-06 22:07:47,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:49,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:07:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:51,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106371359] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:07:51,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:07:51,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 107 [2023-11-06 22:07:51,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765625393] [2023-11-06 22:07:51,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:07:51,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-11-06 22:07:51,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:51,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-11-06 22:07:51,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2560, Invalid=8782, Unknown=0, NotChecked=0, Total=11342 [2023-11-06 22:07:51,611 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:53,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:53,091 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2023-11-06 22:07:53,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-06 22:07:53,091 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2023-11-06 22:07:53,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:53,093 INFO L225 Difference]: With dead ends: 247 [2023-11-06 22:07:53,094 INFO L226 Difference]: Without dead ends: 141 [2023-11-06 22:07:53,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 175 SyntacticMatches, 67 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8581 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4453, Invalid=15569, Unknown=0, NotChecked=0, Total=20022 [2023-11-06 22:07:53,095 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:53,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 321 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:07:53,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-06 22:07:53,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2023-11-06 22:07:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:53,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2023-11-06 22:07:53,124 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 139 [2023-11-06 22:07:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:53,124 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2023-11-06 22:07:53,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.2990654205607477) internal successors, (246), 107 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2023-11-06 22:07:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-06 22:07:53,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:53,125 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:53,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-11-06 22:07:53,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:53,326 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:53,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:53,326 INFO L85 PathProgramCache]: Analyzing trace with hash 733454216, now seen corresponding path program 66 times [2023-11-06 22:07:53,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:53,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008641244] [2023-11-06 22:07:53,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:53,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 561 proven. 1684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:54,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:54,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008641244] [2023-11-06 22:07:54,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008641244] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:07:54,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125568443] [2023-11-06 22:07:54,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:07:54,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:54,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:54,606 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:54,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-11-06 22:07:54,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2023-11-06 22:07:54,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:07:54,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-06 22:07:54,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:55,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:07:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:56,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125568443] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:07:56,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:07:56,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 40 [2023-11-06 22:07:56,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382049677] [2023-11-06 22:07:56,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:07:56,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-06 22:07:56,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:56,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-06 22:07:56,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 22:07:56,200 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:56,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:56,901 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2023-11-06 22:07:56,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-06 22:07:56,902 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 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 140 [2023-11-06 22:07:56,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:56,903 INFO L225 Difference]: With dead ends: 152 [2023-11-06 22:07:56,903 INFO L226 Difference]: Without dead ends: 150 [2023-11-06 22:07:56,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 243 SyntacticMatches, 68 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2612 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2038, Invalid=3512, Unknown=0, NotChecked=0, Total=5550 [2023-11-06 22:07:56,904 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 74 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:56,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 30 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:07:56,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-06 22:07:56,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2023-11-06 22:07:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:56,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2023-11-06 22:07:56,937 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2023-11-06 22:07:56,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:56,938 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2023-11-06 22:07:56,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:07:56,938 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2023-11-06 22:07:56,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-06 22:07:56,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:56,939 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:56,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-11-06 22:07:57,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:57,146 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:57,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:57,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1840734385, now seen corresponding path program 67 times [2023-11-06 22:07:57,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:57,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124224421] [2023-11-06 22:07:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:57,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1651 proven. 695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:59,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:59,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124224421] [2023-11-06 22:07:59,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124224421] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:07:59,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169391832] [2023-11-06 22:07:59,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:07:59,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:59,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:59,629 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:59,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-11-06 22:07:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:59,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-06 22:07:59,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:02,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:08:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:04,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169391832] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:08:04,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:08:04,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 110 [2023-11-06 22:08:04,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584795341] [2023-11-06 22:08:04,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:08:04,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2023-11-06 22:08:04,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:04,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2023-11-06 22:08:04,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=9285, Unknown=0, NotChecked=0, Total=11990 [2023-11-06 22:08:04,098 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:08:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:05,860 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2023-11-06 22:08:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-06 22:08:05,860 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 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 143 [2023-11-06 22:08:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:05,861 INFO L225 Difference]: With dead ends: 254 [2023-11-06 22:08:05,861 INFO L226 Difference]: Without dead ends: 145 [2023-11-06 22:08:05,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 180 SyntacticMatches, 69 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9079 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=4706, Invalid=16464, Unknown=0, NotChecked=0, Total=21170 [2023-11-06 22:08:05,862 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:05,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 575 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:08:05,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-06 22:08:05,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-06 22:08:05,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:08:05,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2023-11-06 22:08:05,925 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 143 [2023-11-06 22:08:05,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:05,926 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2023-11-06 22:08:05,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:08:05,926 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2023-11-06 22:08:05,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-06 22:08:05,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:05,927 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2023-11-06 22:08:05,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-11-06 22:08:06,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-11-06 22:08:06,134 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:06,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:06,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1532781588, now seen corresponding path program 68 times [2023-11-06 22:08:06,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:06,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613656104] [2023-11-06 22:08:06,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:06,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 595 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:07,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:07,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613656104] [2023-11-06 22:08:07,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613656104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:08:07,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558567813] [2023-11-06 22:08:07,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:08:07,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:07,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:07,539 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:07,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-11-06 22:08:07,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:08:07,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:08:07,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-06 22:08:07,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:07,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:08:09,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:09,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558567813] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:08:09,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:08:09,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 41 [2023-11-06 22:08:09,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642826224] [2023-11-06 22:08:09,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:08:09,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 22:08:09,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:09,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 22:08:09,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:08:09,188 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:08:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:09,918 INFO L93 Difference]: Finished difference Result 156 states and 157 transitions. [2023-11-06 22:08:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-06 22:08:09,918 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 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 144 [2023-11-06 22:08:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:09,919 INFO L225 Difference]: With dead ends: 156 [2023-11-06 22:08:09,919 INFO L226 Difference]: Without dead ends: 154 [2023-11-06 22:08:09,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 250 SyntacticMatches, 70 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2759 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2150, Invalid=3702, Unknown=0, NotChecked=0, Total=5852 [2023-11-06 22:08:09,920 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 78 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:09,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 34 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:08:09,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-06 22:08:09,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2023-11-06 22:08:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:08:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2023-11-06 22:08:09,951 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 144 [2023-11-06 22:08:09,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:09,951 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2023-11-06 22:08:09,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:08:09,951 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2023-11-06 22:08:09,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-06 22:08:09,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:09,952 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2023-11-06 22:08:09,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-11-06 22:08:10,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-11-06 22:08:10,158 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:10,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:10,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1000823245, now seen corresponding path program 69 times [2023-11-06 22:08:10,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:10,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418414419] [2023-11-06 22:08:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:10,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1752 proven. 733 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:12,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:12,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418414419] [2023-11-06 22:08:12,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418414419] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:08:12,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28036690] [2023-11-06 22:08:12,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:08:12,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:12,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:12,760 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:12,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-11-06 22:08:12,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2023-11-06 22:08:12,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:08:12,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-06 22:08:12,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:15,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:08:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:17,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28036690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:08:17,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:08:17,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 113 [2023-11-06 22:08:17,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809258268] [2023-11-06 22:08:17,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:08:17,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-11-06 22:08:17,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:17,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-11-06 22:08:17,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2854, Invalid=9802, Unknown=0, NotChecked=0, Total=12656 [2023-11-06 22:08:17,647 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:08:19,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:19,324 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2023-11-06 22:08:19,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-11-06 22:08:19,325 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2023-11-06 22:08:19,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:19,325 INFO L225 Difference]: With dead ends: 261 [2023-11-06 22:08:19,325 INFO L226 Difference]: Without dead ends: 149 [2023-11-06 22:08:19,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 185 SyntacticMatches, 71 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9591 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4966, Invalid=17384, Unknown=0, NotChecked=0, Total=22350 [2023-11-06 22:08:19,327 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:19,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 439 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:08:19,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-06 22:08:19,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-11-06 22:08:19,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:08:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2023-11-06 22:08:19,375 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 147 [2023-11-06 22:08:19,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:19,375 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2023-11-06 22:08:19,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.3008849557522124) internal successors, (260), 113 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:08:19,376 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2023-11-06 22:08:19,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-06 22:08:19,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:19,377 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2023-11-06 22:08:19,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-11-06 22:08:19,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:19,583 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:19,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:19,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1597865864, now seen corresponding path program 70 times [2023-11-06 22:08:19,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:19,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957213485] [2023-11-06 22:08:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:19,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 630 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:21,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:21,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957213485] [2023-11-06 22:08:21,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957213485] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:08:21,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195656675] [2023-11-06 22:08:21,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:08:21,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:21,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:21,013 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:21,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-11-06 22:08:21,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:08:21,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:08:21,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-06 22:08:21,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:21,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:08:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:22,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195656675] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:08:22,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:08:22,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 42 [2023-11-06 22:08:22,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514072939] [2023-11-06 22:08:22,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:08:22,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-06 22:08:22,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:22,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-06 22:08:22,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=973, Unknown=0, NotChecked=0, Total=1722 [2023-11-06 22:08:22,707 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:08:23,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:23,469 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2023-11-06 22:08:23,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-06 22:08:23,470 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 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 148 [2023-11-06 22:08:23,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:23,471 INFO L225 Difference]: With dead ends: 160 [2023-11-06 22:08:23,471 INFO L226 Difference]: Without dead ends: 158 [2023-11-06 22:08:23,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 257 SyntacticMatches, 72 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2910 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2265, Invalid=3897, Unknown=0, NotChecked=0, Total=6162 [2023-11-06 22:08:23,472 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 78 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:23,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 24 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:08:23,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-06 22:08:23,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2023-11-06 22:08:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:08:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2023-11-06 22:08:23,510 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 148 [2023-11-06 22:08:23,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:23,510 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2023-11-06 22:08:23,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:08:23,511 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2023-11-06 22:08:23,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-06 22:08:23,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:23,512 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2023-11-06 22:08:23,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-11-06 22:08:23,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:23,712 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:23,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:23,712 INFO L85 PathProgramCache]: Analyzing trace with hash 904233137, now seen corresponding path program 71 times [2023-11-06 22:08:23,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:23,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978292010] [2023-11-06 22:08:23,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:23,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1856 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:26,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:26,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978292010] [2023-11-06 22:08:26,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978292010] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:08:26,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587406120] [2023-11-06 22:08:26,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:08:26,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:26,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:26,491 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:26,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-11-06 22:08:26,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2023-11-06 22:08:26,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:08:26,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-06 22:08:26,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:29,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:08:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:31,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587406120] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:08:31,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:08:31,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 116 [2023-11-06 22:08:31,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834155393] [2023-11-06 22:08:31,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:08:31,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2023-11-06 22:08:31,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:31,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2023-11-06 22:08:31,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3007, Invalid=10333, Unknown=0, NotChecked=0, Total=13340 [2023-11-06 22:08:31,584 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:08:33,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:33,308 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2023-11-06 22:08:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-06 22:08:33,308 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2023-11-06 22:08:33,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:33,309 INFO L225 Difference]: With dead ends: 268 [2023-11-06 22:08:33,309 INFO L226 Difference]: Without dead ends: 153 [2023-11-06 22:08:33,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 190 SyntacticMatches, 73 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10117 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=5233, Invalid=18329, Unknown=0, NotChecked=0, Total=23562 [2023-11-06 22:08:33,311 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:33,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 383 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:08:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-06 22:08:33,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2023-11-06 22:08:33,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:08:33,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2023-11-06 22:08:33,344 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 151 [2023-11-06 22:08:33,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:33,344 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2023-11-06 22:08:33,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.3017241379310347) internal successors, (267), 116 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:08:33,345 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2023-11-06 22:08:33,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-06 22:08:33,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:33,345 INFO L195 NwaCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2023-11-06 22:08:33,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2023-11-06 22:08:33,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:33,546 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:33,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:33,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1305718548, now seen corresponding path program 72 times [2023-11-06 22:08:33,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:33,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559315106] [2023-11-06 22:08:33,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:33,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 666 proven. 1999 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:35,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:35,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559315106] [2023-11-06 22:08:35,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559315106] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:08:35,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013696697] [2023-11-06 22:08:35,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:08:35,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:35,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:35,062 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:35,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c4c50e-a7c6-47a0-95ea-55a17fbe45a5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-11-06 22:08:35,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2023-11-06 22:08:35,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:08:35,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-06 22:08:35,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:35,476 INFO L327 TraceCheckSpWp]: Computing backward predicates...