./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/feedback_diverge.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/feedback_diverge.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6e296367f1fe3cf145b6868ec70c2d770b2281a31a9d7dcae84843c6ed48125 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:57:03,800 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:57:03,917 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:57:03,928 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:57:03,929 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:57:03,966 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:57:03,968 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:57:03,968 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:57:03,969 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:57:03,974 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:57:03,976 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:57:03,976 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:57:03,977 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:57:03,979 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:57:03,979 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:57:03,980 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:57:03,980 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:57:03,981 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:57:03,981 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:57:03,982 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:57:03,982 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:57:03,983 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:57:03,983 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:57:03,984 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:57:03,984 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:57:03,985 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:57:03,986 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:57:03,986 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:57:03,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:57:03,987 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:57:03,989 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:57:03,989 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:57:03,990 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:57:03,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:57:03,990 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:57:03,990 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:57:03,991 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:57:03,991 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:57:03,991 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:57:03,992 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_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6e296367f1fe3cf145b6868ec70c2d770b2281a31a9d7dcae84843c6ed48125 [2023-11-19 07:57:04,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:57:04,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:57:04,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:57:04,344 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:57:04,344 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:57:04,346 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/float-benchs/feedback_diverge.c [2023-11-19 07:57:07,516 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:57:07,772 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:57:07,773 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/sv-benchmarks/c/float-benchs/feedback_diverge.c [2023-11-19 07:57:07,784 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/data/919b9d9c7/f562421e306142d09777bfb7f1530777/FLAG19482f59a [2023-11-19 07:57:07,804 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/data/919b9d9c7/f562421e306142d09777bfb7f1530777 [2023-11-19 07:57:07,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:57:07,813 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:57:07,816 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:57:07,816 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:57:07,822 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:57:07,823 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:07" (1/1) ... [2023-11-19 07:57:07,824 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66000e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:07, skipping insertion in model container [2023-11-19 07:57:07,824 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:07" (1/1) ... [2023-11-19 07:57:07,849 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:57:08,052 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_93a2bc03-3184-4544-b021-ada72b07dd2c/sv-benchmarks/c/float-benchs/feedback_diverge.c[626,639] [2023-11-19 07:57:08,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:57:08,081 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:57:08,095 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_93a2bc03-3184-4544-b021-ada72b07dd2c/sv-benchmarks/c/float-benchs/feedback_diverge.c[626,639] [2023-11-19 07:57:08,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:57:08,117 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:57:08,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:08 WrapperNode [2023-11-19 07:57:08,118 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:57:08,119 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:57:08,119 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:57:08,119 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:57:08,127 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:08" (1/1) ... [2023-11-19 07:57:08,135 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:08" (1/1) ... [2023-11-19 07:57:08,154 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 48 [2023-11-19 07:57:08,155 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:57:08,156 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:57:08,156 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:57:08,156 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:57:08,166 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:08" (1/1) ... [2023-11-19 07:57:08,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:08" (1/1) ... [2023-11-19 07:57:08,167 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:08" (1/1) ... [2023-11-19 07:57:08,168 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:08" (1/1) ... [2023-11-19 07:57:08,172 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:08" (1/1) ... [2023-11-19 07:57:08,176 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:08" (1/1) ... [2023-11-19 07:57:08,177 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:08" (1/1) ... [2023-11-19 07:57:08,178 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:08" (1/1) ... [2023-11-19 07:57:08,180 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:57:08,181 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:57:08,181 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:57:08,182 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:57:08,183 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:08" (1/1) ... [2023-11-19 07:57:08,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:57:08,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:08,217 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:57:08,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:57:08,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:57:08,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:57:08,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:57:08,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:57:08,329 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:57:08,332 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:57:08,451 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:57:08,458 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:57:08,458 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:57:08,462 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:08 BoogieIcfgContainer [2023-11-19 07:57:08,462 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:57:08,465 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:57:08,465 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:57:08,469 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:57:08,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:57:07" (1/3) ... [2023-11-19 07:57:08,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@806f03d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:57:08, skipping insertion in model container [2023-11-19 07:57:08,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:08" (2/3) ... [2023-11-19 07:57:08,471 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@806f03d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:57:08, skipping insertion in model container [2023-11-19 07:57:08,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:08" (3/3) ... [2023-11-19 07:57:08,472 INFO L112 eAbstractionObserver]: Analyzing ICFG feedback_diverge.c [2023-11-19 07:57:08,494 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:57:08,495 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:57:08,555 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:57:08,564 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4c3d6f89, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:57:08,566 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:57:08,573 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:08,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 07:57:08,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:08,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:57:08,583 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:08,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:08,594 INFO L85 PathProgramCache]: Analyzing trace with hash 889620925, now seen corresponding path program 1 times [2023-11-19 07:57:08,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:08,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746320617] [2023-11-19 07:57:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:08,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:08,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:08,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:08,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746320617] [2023-11-19 07:57:08,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746320617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:57:08,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:57:08,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:57:08,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512123251] [2023-11-19 07:57:08,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:57:08,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:57:08,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:08,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:57:08,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:08,955 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:08,993 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2023-11-19 07:57:08,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:57:08,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2023-11-19 07:57:08,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:09,002 INFO L225 Difference]: With dead ends: 39 [2023-11-19 07:57:09,003 INFO L226 Difference]: Without dead ends: 20 [2023-11-19 07:57:09,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:57:09,010 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:09,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:57:09,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-19 07:57:09,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2023-11-19 07:57:09,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:09,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-11-19 07:57:09,045 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 6 [2023-11-19 07:57:09,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:09,045 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-11-19 07:57:09,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:09,046 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-11-19 07:57:09,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 07:57:09,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:09,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:09,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:57:09,048 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:09,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:09,048 INFO L85 PathProgramCache]: Analyzing trace with hash -875759451, now seen corresponding path program 1 times [2023-11-19 07:57:09,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:09,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895649160] [2023-11-19 07:57:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:09,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:09,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:09,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895649160] [2023-11-19 07:57:09,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895649160] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:09,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624367892] [2023-11-19 07:57:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:09,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:09,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:09,131 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:09,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:57:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:09,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:57:09,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:09,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:09,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624367892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:09,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:09,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 07:57:09,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626513846] [2023-11-19 07:57:09,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:09,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:57:09,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:09,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:57:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:57:09,317 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2023-11-19 07:57:09,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:09,352 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-11-19 07:57:09,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:57:09,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 11 [2023-11-19 07:57:09,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:09,354 INFO L225 Difference]: With dead ends: 39 [2023-11-19 07:57:09,354 INFO L226 Difference]: Without dead ends: 35 [2023-11-19 07:57:09,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:57:09,356 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:09,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 44 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:57:09,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-19 07:57:09,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-19 07:57:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-11-19 07:57:09,364 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 11 [2023-11-19 07:57:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:09,365 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-11-19 07:57:09,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2023-11-19 07:57:09,366 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-11-19 07:57:09,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 07:57:09,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:09,367 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:09,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:09,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:09,572 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:09,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:09,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1424528451, now seen corresponding path program 2 times [2023-11-19 07:57:09,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:09,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596097979] [2023-11-19 07:57:09,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:09,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:09,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:09,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596097979] [2023-11-19 07:57:09,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596097979] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:09,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569006268] [2023-11-19 07:57:09,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:57:09,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:09,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:09,876 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:09,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:57:09,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:57:09,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:09,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:57:09,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:10,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:10,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569006268] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:10,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:10,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-19 07:57:10,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967745712] [2023-11-19 07:57:10,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:10,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:57:10,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:10,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:57:10,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:57:10,112 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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) [2023-11-19 07:57:10,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:10,177 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2023-11-19 07:57:10,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:57:10,178 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-19 07:57:10,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:10,179 INFO L225 Difference]: With dead ends: 81 [2023-11-19 07:57:10,180 INFO L226 Difference]: Without dead ends: 77 [2023-11-19 07:57:10,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:57:10,182 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:10,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 88 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:57:10,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-19 07:57:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-19 07:57:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:10,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2023-11-19 07:57:10,196 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 26 [2023-11-19 07:57:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:10,196 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2023-11-19 07:57:10,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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) [2023-11-19 07:57:10,197 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2023-11-19 07:57:10,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-19 07:57:10,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:10,199 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:10,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:10,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:10,417 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:10,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:10,418 INFO L85 PathProgramCache]: Analyzing trace with hash -998809923, now seen corresponding path program 3 times [2023-11-19 07:57:10,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:10,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992530437] [2023-11-19 07:57:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:10,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:10,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:10,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992530437] [2023-11-19 07:57:10,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992530437] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:10,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855223663] [2023-11-19 07:57:10,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:57:10,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:10,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:10,884 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:10,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:57:10,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-19 07:57:10,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:10,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:57:11,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:11,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:11,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855223663] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:11,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:11,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-19 07:57:11,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472033538] [2023-11-19 07:57:11,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:11,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 07:57:11,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:11,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 07:57:11,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:57:11,536 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 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) [2023-11-19 07:57:11,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:11,705 INFO L93 Difference]: Finished difference Result 165 states and 198 transitions. [2023-11-19 07:57:11,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:57:11,709 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-19 07:57:11,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:11,718 INFO L225 Difference]: With dead ends: 165 [2023-11-19 07:57:11,718 INFO L226 Difference]: Without dead ends: 161 [2023-11-19 07:57:11,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:57:11,723 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 161 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:11,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 160 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:57:11,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-19 07:57:11,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2023-11-19 07:57:11,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.14375) internal successors, (183), 160 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) [2023-11-19 07:57:11,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2023-11-19 07:57:11,749 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 56 [2023-11-19 07:57:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:11,750 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2023-11-19 07:57:11,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 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) [2023-11-19 07:57:11,750 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2023-11-19 07:57:11,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-19 07:57:11,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:11,756 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:11,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:11,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:11,969 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:11,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:11,970 INFO L85 PathProgramCache]: Analyzing trace with hash 870679741, now seen corresponding path program 4 times [2023-11-19 07:57:11,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:11,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423525360] [2023-11-19 07:57:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:11,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:12,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:12,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423525360] [2023-11-19 07:57:12,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423525360] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:12,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77219227] [2023-11-19 07:57:12,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:57:12,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:12,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:12,876 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:12,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:57:12,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:57:12,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:12,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 07:57:12,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:13,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:14,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77219227] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:14,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:14,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-11-19 07:57:14,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286519951] [2023-11-19 07:57:14,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:14,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-19 07:57:14,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:14,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-19 07:57:14,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-19 07:57:14,227 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 49 states, 49 states have (on average 4.775510204081633) internal successors, (234), 49 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:14,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:14,559 INFO L93 Difference]: Finished difference Result 333 states and 402 transitions. [2023-11-19 07:57:14,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-19 07:57:14,564 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.775510204081633) internal successors, (234), 49 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2023-11-19 07:57:14,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:14,568 INFO L225 Difference]: With dead ends: 333 [2023-11-19 07:57:14,575 INFO L226 Difference]: Without dead ends: 329 [2023-11-19 07:57:14,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-19 07:57:14,577 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 515 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:14,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 302 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:57:14,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-11-19 07:57:14,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2023-11-19 07:57:14,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.1432926829268293) internal successors, (375), 328 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 375 transitions. [2023-11-19 07:57:14,619 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 375 transitions. Word has length 116 [2023-11-19 07:57:14,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:14,620 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 375 transitions. [2023-11-19 07:57:14,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.775510204081633) internal successors, (234), 49 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 375 transitions. [2023-11-19 07:57:14,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2023-11-19 07:57:14,628 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:14,629 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:14,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:14,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:14,850 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:14,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:14,851 INFO L85 PathProgramCache]: Analyzing trace with hash 582668477, now seen corresponding path program 5 times [2023-11-19 07:57:14,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:14,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791442165] [2023-11-19 07:57:14,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:14,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:17,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:17,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791442165] [2023-11-19 07:57:17,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791442165] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:17,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729937678] [2023-11-19 07:57:17,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:57:17,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:17,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:17,391 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:17,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:57:17,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2023-11-19 07:57:17,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:17,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-19 07:57:17,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:17,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:21,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729937678] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:21,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:21,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-11-19 07:57:21,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333618004] [2023-11-19 07:57:21,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:21,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-19 07:57:21,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:21,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-19 07:57:21,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-11-19 07:57:21,460 INFO L87 Difference]: Start difference. First operand 329 states and 375 transitions. Second operand has 97 states, 97 states have (on average 4.88659793814433) internal successors, (474), 97 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:23,119 INFO L93 Difference]: Finished difference Result 669 states and 810 transitions. [2023-11-19 07:57:23,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-19 07:57:23,125 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.88659793814433) internal successors, (474), 97 states have internal predecessors, (474), 0 states have call successors, (0), 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 236 [2023-11-19 07:57:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:23,130 INFO L225 Difference]: With dead ends: 669 [2023-11-19 07:57:23,130 INFO L226 Difference]: Without dead ends: 665 [2023-11-19 07:57:23,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-11-19 07:57:23,135 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1202 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1202 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:23,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1202 Valid, 600 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:57:23,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2023-11-19 07:57:23,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2023-11-19 07:57:23,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 1.1430722891566265) internal successors, (759), 664 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 759 transitions. [2023-11-19 07:57:23,164 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 759 transitions. Word has length 236 [2023-11-19 07:57:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:23,165 INFO L495 AbstractCegarLoop]: Abstraction has 665 states and 759 transitions. [2023-11-19 07:57:23,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.88659793814433) internal successors, (474), 97 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:23,166 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 759 transitions. [2023-11-19 07:57:23,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-11-19 07:57:23,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:23,180 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:23,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:57:23,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:57:23,402 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:23,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:23,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1974900547, now seen corresponding path program 6 times [2023-11-19 07:57:23,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:23,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787480164] [2023-11-19 07:57:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:23,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:57:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:31,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:57:31,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787480164] [2023-11-19 07:57:31,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787480164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:57:31,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039570295] [2023-11-19 07:57:31,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:57:31,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:57:31,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:57:31,961 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:57:31,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:57:32,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2023-11-19 07:57:32,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:57:32,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-19 07:57:32,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:57:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:33,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:57:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:57:44,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039570295] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:57:44,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:57:44,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2023-11-19 07:57:44,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624057722] [2023-11-19 07:57:44,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:57:44,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-11-19 07:57:44,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:57:44,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-11-19 07:57:44,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-11-19 07:57:44,900 INFO L87 Difference]: Start difference. First operand 665 states and 759 transitions. Second operand has 193 states, 193 states have (on average 4.94300518134715) internal successors, (954), 193 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:57:59,028 INFO L93 Difference]: Finished difference Result 1341 states and 1626 transitions. [2023-11-19 07:57:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-11-19 07:57:59,029 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 4.94300518134715) internal successors, (954), 193 states have internal predecessors, (954), 0 states have call successors, (0), 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 476 [2023-11-19 07:57:59,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:57:59,037 INFO L225 Difference]: With dead ends: 1341 [2023-11-19 07:57:59,037 INFO L226 Difference]: Without dead ends: 1337 [2023-11-19 07:57:59,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 856 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-11-19 07:57:59,043 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2930 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2930 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:57:59,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2930 Valid, 1154 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:57:59,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2023-11-19 07:57:59,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1337. [2023-11-19 07:57:59,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 1.1429640718562875) internal successors, (1527), 1336 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1527 transitions. [2023-11-19 07:57:59,076 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1527 transitions. Word has length 476 [2023-11-19 07:57:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:57:59,077 INFO L495 AbstractCegarLoop]: Abstraction has 1337 states and 1527 transitions. [2023-11-19 07:57:59,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 4.94300518134715) internal successors, (954), 193 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:57:59,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1527 transitions. [2023-11-19 07:57:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2023-11-19 07:57:59,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:57:59,115 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 190, 190, 190, 1, 1, 1, 1, 1, 1] [2023-11-19 07:57:59,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-19 07:57:59,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93a2bc03-3184-4544-b021-ada72b07dd2c/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:57:59,331 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:57:59,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:57:59,332 INFO L85 PathProgramCache]: Analyzing trace with hash -789145411, now seen corresponding path program 7 times [2023-11-19 07:57:59,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:57:59,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396193667] [2023-11-19 07:57:59,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:57:59,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:57:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat