./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/watermelon.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/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_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/watermelon.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/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_1743d641-a6e1-44c9-88ab-c786ebcb8e02/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 dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:16:05,224 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:16:05,332 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:16:05,340 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:16:05,341 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:16:05,382 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:16:05,383 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:16:05,383 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:16:05,384 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:16:05,389 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:16:05,391 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:16:05,391 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:16:05,392 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:16:05,394 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:16:05,394 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:16:05,395 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:16:05,395 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:16:05,396 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:16:05,396 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:16:05,397 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:16:05,397 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:16:05,398 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:16:05,399 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:16:05,400 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:16:05,401 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:16:05,402 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:16:05,402 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:16:05,403 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:16:05,403 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:16:05,404 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:16:05,405 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:16:05,406 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:16:05,406 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:16:05,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:16:05,406 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:16:05,407 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:16:05,407 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:16:05,407 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:16:05,408 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:16:05,408 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_1743d641-a6e1-44c9-88ab-c786ebcb8e02/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 [2023-11-06 21:16:05,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:16:05,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:16:05,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:16:05,779 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:16:05,779 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:16:05,781 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/loops-crafted-1/watermelon.c [2023-11-06 21:16:08,880 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:16:09,139 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:16:09,140 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/sv-benchmarks/c/loops-crafted-1/watermelon.c [2023-11-06 21:16:09,149 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/data/55ef075b1/6bbff0d398bd49c1bb4dfe76d05ca302/FLAG0182a6502 [2023-11-06 21:16:09,164 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/data/55ef075b1/6bbff0d398bd49c1bb4dfe76d05ca302 [2023-11-06 21:16:09,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:16:09,168 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:16:09,170 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:16:09,170 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:16:09,176 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:16:09,177 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:16:09" (1/1) ... [2023-11-06 21:16:09,178 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a6513fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:16:09, skipping insertion in model container [2023-11-06 21:16:09,178 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:16:09" (1/1) ... [2023-11-06 21:16:09,201 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:16:09,351 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_1743d641-a6e1-44c9-88ab-c786ebcb8e02/sv-benchmarks/c/loops-crafted-1/watermelon.c[373,386] [2023-11-06 21:16:09,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:16:09,390 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:16:09,405 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_1743d641-a6e1-44c9-88ab-c786ebcb8e02/sv-benchmarks/c/loops-crafted-1/watermelon.c[373,386] [2023-11-06 21:16:09,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:16:09,434 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:16:09,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:16:09 WrapperNode [2023-11-06 21:16:09,435 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:16:09,436 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:16:09,437 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:16:09,437 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:16:09,445 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:16:09" (1/1) ... [2023-11-06 21:16:09,451 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:16:09" (1/1) ... [2023-11-06 21:16:09,471 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2023-11-06 21:16:09,471 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:16:09,472 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:16:09,472 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:16:09,472 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:16:09,483 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:16:09" (1/1) ... [2023-11-06 21:16:09,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:16:09" (1/1) ... [2023-11-06 21:16:09,499 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:16:09" (1/1) ... [2023-11-06 21:16:09,499 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:16:09" (1/1) ... [2023-11-06 21:16:09,503 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:16:09" (1/1) ... [2023-11-06 21:16:09,506 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:16:09" (1/1) ... [2023-11-06 21:16:09,509 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:16:09" (1/1) ... [2023-11-06 21:16:09,511 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:16:09" (1/1) ... [2023-11-06 21:16:09,513 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:16:09,514 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:16:09,514 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:16:09,514 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:16:09,515 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:16:09" (1/1) ... [2023-11-06 21:16:09,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:16:09,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:09,552 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:16:09,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:16:09,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:16:09,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:16:09,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:16:09,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:16:09,673 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:16:09,676 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:16:09,835 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:16:09,842 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:16:09,842 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 21:16:09,844 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:16:09 BoogieIcfgContainer [2023-11-06 21:16:09,845 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:16:09,847 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:16:09,847 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:16:09,851 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:16:09,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:16:09" (1/3) ... [2023-11-06 21:16:09,852 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257c283c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:16:09, skipping insertion in model container [2023-11-06 21:16:09,852 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:16:09" (2/3) ... [2023-11-06 21:16:09,853 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257c283c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:16:09, skipping insertion in model container [2023-11-06 21:16:09,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:16:09" (3/3) ... [2023-11-06 21:16:09,855 INFO L112 eAbstractionObserver]: Analyzing ICFG watermelon.c [2023-11-06 21:16:09,875 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:16:09,875 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:16:09,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:16:09,956 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;@51dd8914, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:16:09,957 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:16:09,961 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 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 21:16:09,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 21:16:09,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:09,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:09,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:09,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:09,998 INFO L85 PathProgramCache]: Analyzing trace with hash -308913183, now seen corresponding path program 1 times [2023-11-06 21:16:10,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:10,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147579025] [2023-11-06 21:16:10,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:10,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:10,594 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 21:16:10,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:10,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147579025] [2023-11-06 21:16:10,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147579025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:16:10,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:16:10,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 21:16:10,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874102850] [2023-11-06 21:16:10,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:16:10,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:16:10,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:10,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:16:10,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:16:10,650 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 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) Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 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 21:16:10,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:10,904 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2023-11-06 21:16:10,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:16:10,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 21:16:10,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:10,916 INFO L225 Difference]: With dead ends: 69 [2023-11-06 21:16:10,917 INFO L226 Difference]: Without dead ends: 33 [2023-11-06 21:16:10,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:16:10,927 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 55 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:10,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 169 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:16:10,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-06 21:16:10,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2023-11-06 21:16:10,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 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 21:16:10,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-11-06 21:16:10,973 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 11 [2023-11-06 21:16:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:10,974 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-11-06 21:16:10,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 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 21:16:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-11-06 21:16:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 21:16:10,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:10,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:10,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:16:10,980 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:10,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:10,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1020608492, now seen corresponding path program 1 times [2023-11-06 21:16:10,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:10,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093229215] [2023-11-06 21:16:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:10,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:11,138 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 21:16:11,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:11,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093229215] [2023-11-06 21:16:11,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093229215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:16:11,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:16:11,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:16:11,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403408054] [2023-11-06 21:16:11,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:16:11,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:16:11,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:11,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:16:11,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:16:11,144 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 21:16:11,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:11,174 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2023-11-06 21:16:11,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:16:11,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) Word has length 14 [2023-11-06 21:16:11,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:11,177 INFO L225 Difference]: With dead ends: 39 [2023-11-06 21:16:11,178 INFO L226 Difference]: Without dead ends: 31 [2023-11-06 21:16:11,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:16:11,180 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:11,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 38 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:16:11,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-06 21:16:11,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-11-06 21:16:11,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:11,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-11-06 21:16:11,190 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 14 [2023-11-06 21:16:11,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:11,191 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-11-06 21:16:11,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 21:16:11,191 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-11-06 21:16:11,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 21:16:11,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:11,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:11,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:16:11,194 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:11,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:11,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1347327971, now seen corresponding path program 1 times [2023-11-06 21:16:11,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:11,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063843052] [2023-11-06 21:16:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:11,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:11,247 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 21:16:11,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:11,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063843052] [2023-11-06 21:16:11,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063843052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:16:11,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:16:11,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:16:11,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189872735] [2023-11-06 21:16:11,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:16:11,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:16:11,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:11,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:16:11,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:16:11,250 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 21:16:11,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:11,272 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2023-11-06 21:16:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:16:11,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) Word has length 14 [2023-11-06 21:16:11,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:11,273 INFO L225 Difference]: With dead ends: 54 [2023-11-06 21:16:11,273 INFO L226 Difference]: Without dead ends: 31 [2023-11-06 21:16:11,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:16:11,276 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:11,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 38 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:16:11,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-06 21:16:11,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-11-06 21:16:11,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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 21:16:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-11-06 21:16:11,283 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2023-11-06 21:16:11,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:11,283 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-11-06 21:16:11,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 21:16:11,284 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-11-06 21:16:11,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 21:16:11,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:11,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:11,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:16:11,285 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:11,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:11,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1588251726, now seen corresponding path program 1 times [2023-11-06 21:16:11,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:11,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579522519] [2023-11-06 21:16:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:11,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:11,346 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 21:16:11,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:11,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579522519] [2023-11-06 21:16:11,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579522519] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:11,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347196804] [2023-11-06 21:16:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:11,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:11,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:11,352 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:11,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:16:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:11,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:16:11,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:16:11,799 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:16:11,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347196804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:16:11,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:16:11,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-11-06 21:16:11,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647089652] [2023-11-06 21:16:11,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:16:11,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:16:11,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:11,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:16:11,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:16:11,807 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 21:16:11,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:11,893 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2023-11-06 21:16:11,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:16:11,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-06 21:16:11,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:11,895 INFO L225 Difference]: With dead ends: 45 [2023-11-06 21:16:11,895 INFO L226 Difference]: Without dead ends: 32 [2023-11-06 21:16:11,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:16:11,897 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:11,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 58 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:16:11,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-06 21:16:11,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2023-11-06 21:16:11,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-11-06 21:16:11,906 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 16 [2023-11-06 21:16:11,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:11,906 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-11-06 21:16:11,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 21:16:11,906 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-11-06 21:16:11,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 21:16:11,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:11,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:11,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:12,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:12,114 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:12,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:12,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1821914591, now seen corresponding path program 1 times [2023-11-06 21:16:12,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:12,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497129996] [2023-11-06 21:16:12,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:12,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:12,168 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 21:16:12,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:12,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497129996] [2023-11-06 21:16:12,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497129996] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:12,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360339281] [2023-11-06 21:16:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:12,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:12,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:12,171 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:12,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:16:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:12,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:16:12,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:12,274 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 21:16:12,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:12,300 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 21:16:12,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360339281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:12,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:12,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-06 21:16:12,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401099818] [2023-11-06 21:16:12,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:12,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:16:12,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:12,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:16:12,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:16:12,302 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 21:16:12,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:12,328 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2023-11-06 21:16:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:16:12,329 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 16 [2023-11-06 21:16:12,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:12,330 INFO L225 Difference]: With dead ends: 56 [2023-11-06 21:16:12,330 INFO L226 Difference]: Without dead ends: 33 [2023-11-06 21:16:12,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:16:12,331 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:12,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 52 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:16:12,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-06 21:16:12,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2023-11-06 21:16:12,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:12,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-11-06 21:16:12,339 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 16 [2023-11-06 21:16:12,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:12,339 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-11-06 21:16:12,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 21:16:12,340 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-11-06 21:16:12,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 21:16:12,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:12,341 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:12,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:12,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:12,547 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:12,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:12,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1962763487, now seen corresponding path program 2 times [2023-11-06 21:16:12,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:12,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905967482] [2023-11-06 21:16:12,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:12,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:16:12,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:12,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905967482] [2023-11-06 21:16:12,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905967482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:16:12,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:16:12,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:16:12,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009894889] [2023-11-06 21:16:12,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:16:12,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:16:12,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:12,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:16:12,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:16:12,769 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 21:16:12,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:12,828 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2023-11-06 21:16:12,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:16:12,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 18 [2023-11-06 21:16:12,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:12,830 INFO L225 Difference]: With dead ends: 37 [2023-11-06 21:16:12,830 INFO L226 Difference]: Without dead ends: 32 [2023-11-06 21:16:12,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:16:12,831 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:12,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 35 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:16:12,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-06 21:16:12,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-06 21:16:12,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 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 21:16:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-11-06 21:16:12,842 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 18 [2023-11-06 21:16:12,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:12,843 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-11-06 21:16:12,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 21:16:12,843 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-11-06 21:16:12,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-06 21:16:12,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:12,844 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:12,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:16:12,845 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:12,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:12,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1305286348, now seen corresponding path program 1 times [2023-11-06 21:16:12,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:12,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627202848] [2023-11-06 21:16:12,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:12,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:16:12,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:12,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627202848] [2023-11-06 21:16:12,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627202848] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:12,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560518312] [2023-11-06 21:16:12,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:12,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:12,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:12,923 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:12,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:16:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:12,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:16:12,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:16:13,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:16:13,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560518312] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:13,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:13,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2023-11-06 21:16:13,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923957157] [2023-11-06 21:16:13,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:13,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:16:13,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:13,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:16:13,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:16:13,045 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2023-11-06 21:16:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:13,104 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2023-11-06 21:16:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:16:13,105 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) Word has length 23 [2023-11-06 21:16:13,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:13,105 INFO L225 Difference]: With dead ends: 56 [2023-11-06 21:16:13,106 INFO L226 Difference]: Without dead ends: 41 [2023-11-06 21:16:13,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:16:13,107 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 5 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:13,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 49 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:16:13,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-06 21:16:13,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2023-11-06 21:16:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 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 21:16:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2023-11-06 21:16:13,121 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 23 [2023-11-06 21:16:13,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:13,122 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2023-11-06 21:16:13,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2023-11-06 21:16:13,122 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2023-11-06 21:16:13,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 21:16:13,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:13,124 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:13,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:13,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:13,330 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:13,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:13,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1364091054, now seen corresponding path program 1 times [2023-11-06 21:16:13,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:13,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258907036] [2023-11-06 21:16:13,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:13,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:16:13,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:13,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258907036] [2023-11-06 21:16:13,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258907036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:13,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561841026] [2023-11-06 21:16:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:13,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:13,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:13,448 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:13,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:16:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:13,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:16:13,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:16:13,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:16:13,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561841026] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:13,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:13,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-06 21:16:13,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080447835] [2023-11-06 21:16:13,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:13,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 21:16:13,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:13,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 21:16:13,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:16:13,625 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 21:16:13,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:13,671 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2023-11-06 21:16:13,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:16:13,672 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-06 21:16:13,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:13,673 INFO L225 Difference]: With dead ends: 55 [2023-11-06 21:16:13,673 INFO L226 Difference]: Without dead ends: 49 [2023-11-06 21:16:13,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:16:13,674 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:13,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 75 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:16:13,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-06 21:16:13,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2023-11-06 21:16:13,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:13,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-11-06 21:16:13,688 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 25 [2023-11-06 21:16:13,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:13,689 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-11-06 21:16:13,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 21:16:13,689 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-11-06 21:16:13,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 21:16:13,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:13,690 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:13,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:13,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 21:16:13,896 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:13,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:13,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1306832752, now seen corresponding path program 1 times [2023-11-06 21:16:13,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:13,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123365897] [2023-11-06 21:16:13,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:13,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 21:16:14,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:14,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123365897] [2023-11-06 21:16:14,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123365897] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:16:14,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:16:14,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 21:16:14,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299273995] [2023-11-06 21:16:14,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:16:14,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:16:14,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:14,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:16:14,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:16:14,026 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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 21:16:14,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:14,093 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2023-11-06 21:16:14,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:16:14,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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) Word has length 25 [2023-11-06 21:16:14,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:14,094 INFO L225 Difference]: With dead ends: 54 [2023-11-06 21:16:14,094 INFO L226 Difference]: Without dead ends: 47 [2023-11-06 21:16:14,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:16:14,097 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:14,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 99 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:16:14,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-06 21:16:14,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2023-11-06 21:16:14,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 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 21:16:14,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2023-11-06 21:16:14,117 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 25 [2023-11-06 21:16:14,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:14,119 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2023-11-06 21:16:14,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 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 21:16:14,119 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2023-11-06 21:16:14,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 21:16:14,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:14,120 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:14,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 21:16:14,120 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:14,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:14,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1829116944, now seen corresponding path program 2 times [2023-11-06 21:16:14,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:14,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264970537] [2023-11-06 21:16:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:14,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:14,560 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 21:16:14,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:14,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264970537] [2023-11-06 21:16:14,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264970537] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:14,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749456906] [2023-11-06 21:16:14,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:16:14,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:14,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:14,563 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:14,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:16:14,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:16:14,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:14,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:16:14,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:15,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:15,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749456906] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:15,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:15,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2023-11-06 21:16:15,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229311894] [2023-11-06 21:16:15,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:15,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:16:15,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:15,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:16:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:16:15,469 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:15,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:15,778 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2023-11-06 21:16:15,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 21:16:15,778 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-06 21:16:15,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:15,779 INFO L225 Difference]: With dead ends: 60 [2023-11-06 21:16:15,779 INFO L226 Difference]: Without dead ends: 41 [2023-11-06 21:16:15,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:16:15,781 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:15,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 85 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:16:15,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-06 21:16:15,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-11-06 21:16:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-11-06 21:16:15,795 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 27 [2023-11-06 21:16:15,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:15,796 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-11-06 21:16:15,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:15,796 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-11-06 21:16:15,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 21:16:15,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:15,797 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:15,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:16,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:16:16,003 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:16,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:16,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1549662672, now seen corresponding path program 2 times [2023-11-06 21:16:16,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:16,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578948987] [2023-11-06 21:16:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:16,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:16,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:16,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578948987] [2023-11-06 21:16:16,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578948987] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:16,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993644352] [2023-11-06 21:16:16,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:16:16,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:16,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:16,371 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:16,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:16:16,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:16:16,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:16,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:16:16,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:16,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:17,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993644352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:17,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:17,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2023-11-06 21:16:17,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714896832] [2023-11-06 21:16:17,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:17,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:16:17,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:17,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:16:17,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:16:17,083 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 21:16:17,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:17,324 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2023-11-06 21:16:17,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 21:16:17,325 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) Word has length 27 [2023-11-06 21:16:17,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:17,325 INFO L225 Difference]: With dead ends: 51 [2023-11-06 21:16:17,325 INFO L226 Difference]: Without dead ends: 44 [2023-11-06 21:16:17,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:16:17,327 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 59 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:17,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 67 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:16:17,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-06 21:16:17,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2023-11-06 21:16:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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 21:16:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2023-11-06 21:16:17,342 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 27 [2023-11-06 21:16:17,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:17,342 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2023-11-06 21:16:17,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 21:16:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2023-11-06 21:16:17,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 21:16:17,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:17,344 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:17,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:17,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:17,550 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:17,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1163858322, now seen corresponding path program 3 times [2023-11-06 21:16:17,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:17,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459246618] [2023-11-06 21:16:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:17,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:17,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:17,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459246618] [2023-11-06 21:16:17,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459246618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:17,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129695935] [2023-11-06 21:16:17,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:16:17,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:17,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:17,991 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:18,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:16:18,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 21:16:18,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:18,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 21:16:18,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:18,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:19,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129695935] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:19,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:19,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2023-11-06 21:16:19,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960235138] [2023-11-06 21:16:19,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:19,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 21:16:19,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:19,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 21:16:19,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2023-11-06 21:16:19,073 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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 21:16:19,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:19,628 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2023-11-06 21:16:19,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:16:19,629 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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) Word has length 29 [2023-11-06 21:16:19,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:19,630 INFO L225 Difference]: With dead ends: 68 [2023-11-06 21:16:19,630 INFO L226 Difference]: Without dead ends: 47 [2023-11-06 21:16:19,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=306, Invalid=1254, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 21:16:19,632 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:19,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 118 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:16:19,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-06 21:16:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-11-06 21:16:19,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 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 21:16:19,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2023-11-06 21:16:19,651 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 29 [2023-11-06 21:16:19,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:19,652 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2023-11-06 21:16:19,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 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 21:16:19,652 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2023-11-06 21:16:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 21:16:19,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:19,655 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:19,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:19,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 21:16:19,861 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:19,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:19,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1079705966, now seen corresponding path program 3 times [2023-11-06 21:16:19,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:19,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610916271] [2023-11-06 21:16:19,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:19,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:20,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:20,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610916271] [2023-11-06 21:16:20,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610916271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:20,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986390382] [2023-11-06 21:16:20,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:16:20,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:20,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:20,264 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:20,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:16:20,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 21:16:20,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:20,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 21:16:20,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:20,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:21,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986390382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:21,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:21,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2023-11-06 21:16:21,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185934543] [2023-11-06 21:16:21,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:21,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 21:16:21,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:21,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 21:16:21,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:16:21,177 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 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 21:16:21,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:21,530 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2023-11-06 21:16:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:16:21,531 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 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) Word has length 29 [2023-11-06 21:16:21,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:21,532 INFO L225 Difference]: With dead ends: 61 [2023-11-06 21:16:21,532 INFO L226 Difference]: Without dead ends: 54 [2023-11-06 21:16:21,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=319, Invalid=1241, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 21:16:21,534 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:21,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 57 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:16:21,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-06 21:16:21,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2023-11-06 21:16:21,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:21,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-11-06 21:16:21,549 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 29 [2023-11-06 21:16:21,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:21,549 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-11-06 21:16:21,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 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 21:16:21,550 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-11-06 21:16:21,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-06 21:16:21,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:21,551 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:21,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:21,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 21:16:21,761 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:21,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:21,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1607675660, now seen corresponding path program 4 times [2023-11-06 21:16:21,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:21,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657652273] [2023-11-06 21:16:21,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:21,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:22,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:22,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657652273] [2023-11-06 21:16:22,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657652273] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:22,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610036929] [2023-11-06 21:16:22,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:16:22,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:22,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:22,240 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:22,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:16:22,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:16:22,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:22,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 21:16:22,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:22,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:23,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610036929] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:23,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:23,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2023-11-06 21:16:23,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484044005] [2023-11-06 21:16:23,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:23,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 21:16:23,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:23,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 21:16:23,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2023-11-06 21:16:23,221 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 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 21:16:23,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:23,594 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2023-11-06 21:16:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:16:23,595 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 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) Word has length 31 [2023-11-06 21:16:23,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:23,595 INFO L225 Difference]: With dead ends: 68 [2023-11-06 21:16:23,596 INFO L226 Difference]: Without dead ends: 47 [2023-11-06 21:16:23,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 21:16:23,597 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:23,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 116 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:16:23,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-06 21:16:23,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-11-06 21:16:23,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 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 21:16:23,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2023-11-06 21:16:23,624 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 31 [2023-11-06 21:16:23,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:23,624 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2023-11-06 21:16:23,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 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 21:16:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2023-11-06 21:16:23,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-06 21:16:23,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:23,631 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:23,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:23,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:23,838 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:23,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:23,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1808751508, now seen corresponding path program 4 times [2023-11-06 21:16:23,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:23,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145113566] [2023-11-06 21:16:23,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:23,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:24,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:24,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145113566] [2023-11-06 21:16:24,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145113566] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:24,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059650533] [2023-11-06 21:16:24,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:16:24,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:24,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:24,340 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:24,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:16:24,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:16:24,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:24,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 21:16:24,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:24,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:25,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059650533] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:25,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:25,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2023-11-06 21:16:25,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819812146] [2023-11-06 21:16:25,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:25,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 21:16:25,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:25,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 21:16:25,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2023-11-06 21:16:25,283 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 21:16:25,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:25,601 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2023-11-06 21:16:25,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:16:25,601 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 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 21:16:25,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:25,602 INFO L225 Difference]: With dead ends: 57 [2023-11-06 21:16:25,602 INFO L226 Difference]: Without dead ends: 50 [2023-11-06 21:16:25,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 21:16:25,604 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 79 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:25,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 69 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:16:25,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-06 21:16:25,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2023-11-06 21:16:25,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:25,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2023-11-06 21:16:25,621 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 31 [2023-11-06 21:16:25,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:25,622 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2023-11-06 21:16:25,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 21:16:25,622 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2023-11-06 21:16:25,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-06 21:16:25,623 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:25,623 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:25,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:25,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 21:16:25,824 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:25,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:25,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1215521290, now seen corresponding path program 5 times [2023-11-06 21:16:25,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:25,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217937477] [2023-11-06 21:16:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:25,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:26,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:26,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217937477] [2023-11-06 21:16:26,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217937477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:26,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849806327] [2023-11-06 21:16:26,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:16:26,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:26,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:26,395 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:26,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:16:26,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-06 21:16:26,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:26,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 21:16:26,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:27,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:27,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849806327] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:27,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:27,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2023-11-06 21:16:27,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847532687] [2023-11-06 21:16:27,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:27,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 21:16:27,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:27,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 21:16:27,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 21:16:27,601 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 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 21:16:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:28,206 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2023-11-06 21:16:28,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 21:16:28,207 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 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 33 [2023-11-06 21:16:28,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:28,207 INFO L225 Difference]: With dead ends: 76 [2023-11-06 21:16:28,208 INFO L226 Difference]: Without dead ends: 53 [2023-11-06 21:16:28,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=396, Invalid=1674, Unknown=0, NotChecked=0, Total=2070 [2023-11-06 21:16:28,210 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 74 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:28,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 99 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:16:28,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-06 21:16:28,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2023-11-06 21:16:28,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.1) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:28,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-11-06 21:16:28,226 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 33 [2023-11-06 21:16:28,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:28,226 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-11-06 21:16:28,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 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 21:16:28,227 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-11-06 21:16:28,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-06 21:16:28,227 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:28,227 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:28,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-06 21:16:28,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:28,434 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:28,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:28,434 INFO L85 PathProgramCache]: Analyzing trace with hash 340614538, now seen corresponding path program 5 times [2023-11-06 21:16:28,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:28,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529498118] [2023-11-06 21:16:28,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:28,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:28,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:28,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529498118] [2023-11-06 21:16:28,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529498118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:28,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617858879] [2023-11-06 21:16:28,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:16:28,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:28,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:28,968 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:28,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:16:29,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-06 21:16:29,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:29,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 21:16:29,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:29,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:30,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617858879] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:30,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:30,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2023-11-06 21:16:30,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792544333] [2023-11-06 21:16:30,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:30,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 21:16:30,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:30,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 21:16:30,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 21:16:30,142 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 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 21:16:30,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:30,649 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2023-11-06 21:16:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 21:16:30,649 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 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 33 [2023-11-06 21:16:30,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:30,650 INFO L225 Difference]: With dead ends: 67 [2023-11-06 21:16:30,650 INFO L226 Difference]: Without dead ends: 60 [2023-11-06 21:16:30,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=415, Invalid=1655, Unknown=0, NotChecked=0, Total=2070 [2023-11-06 21:16:30,653 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 121 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:30,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 96 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:16:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-06 21:16:30,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2023-11-06 21:16:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 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 21:16:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-11-06 21:16:30,675 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 33 [2023-11-06 21:16:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:30,675 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-11-06 21:16:30,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 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 21:16:30,676 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-11-06 21:16:30,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-06 21:16:30,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:30,677 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:30,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-06 21:16:30,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:30,882 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:30,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:30,883 INFO L85 PathProgramCache]: Analyzing trace with hash 10417192, now seen corresponding path program 6 times [2023-11-06 21:16:30,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:30,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002598409] [2023-11-06 21:16:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:30,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:31,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002598409] [2023-11-06 21:16:31,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002598409] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862863777] [2023-11-06 21:16:31,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:16:31,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:31,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:31,392 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:31,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:16:31,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-06 21:16:31,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:31,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 21:16:31,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:32,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:32,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862863777] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:32,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:32,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2023-11-06 21:16:32,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474386837] [2023-11-06 21:16:32,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:32,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 21:16:32,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:32,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 21:16:32,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 21:16:32,577 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 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 21:16:33,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:33,054 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2023-11-06 21:16:33,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:16:33,055 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 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 35 [2023-11-06 21:16:33,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:33,055 INFO L225 Difference]: With dead ends: 76 [2023-11-06 21:16:33,055 INFO L226 Difference]: Without dead ends: 53 [2023-11-06 21:16:33,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=355, Invalid=1367, Unknown=0, NotChecked=0, Total=1722 [2023-11-06 21:16:33,057 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:33,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 98 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:16:33,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-06 21:16:33,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-11-06 21:16:33,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:33,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2023-11-06 21:16:33,073 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 35 [2023-11-06 21:16:33,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:33,073 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2023-11-06 21:16:33,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 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 21:16:33,074 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2023-11-06 21:16:33,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-06 21:16:33,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:33,074 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:33,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:33,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:33,283 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:33,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:33,284 INFO L85 PathProgramCache]: Analyzing trace with hash -954472184, now seen corresponding path program 6 times [2023-11-06 21:16:33,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:33,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353241891] [2023-11-06 21:16:33,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:33,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:33,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:33,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353241891] [2023-11-06 21:16:33,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353241891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:33,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586315839] [2023-11-06 21:16:33,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:16:33,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:33,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:33,747 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:33,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 21:16:33,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-06 21:16:33,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:33,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 21:16:33,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:34,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:34,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586315839] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:34,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:34,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2023-11-06 21:16:34,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469837064] [2023-11-06 21:16:34,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:34,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 21:16:34,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:34,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 21:16:34,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 21:16:34,759 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 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 21:16:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:35,046 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2023-11-06 21:16:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:16:35,046 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 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) Word has length 35 [2023-11-06 21:16:35,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:35,047 INFO L225 Difference]: With dead ends: 63 [2023-11-06 21:16:35,047 INFO L226 Difference]: Without dead ends: 56 [2023-11-06 21:16:35,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2023-11-06 21:16:35,050 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 114 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:35,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 62 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:16:35,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-06 21:16:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2023-11-06 21:16:35,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:35,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2023-11-06 21:16:35,068 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 35 [2023-11-06 21:16:35,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:35,069 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2023-11-06 21:16:35,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 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 21:16:35,070 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2023-11-06 21:16:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 21:16:35,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:35,071 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:35,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:35,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:35,276 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:35,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:35,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1839198118, now seen corresponding path program 7 times [2023-11-06 21:16:35,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:35,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904306363] [2023-11-06 21:16:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:35,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:35,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:35,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904306363] [2023-11-06 21:16:35,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904306363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:35,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054862878] [2023-11-06 21:16:35,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:16:35,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:35,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:35,895 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:35,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 21:16:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:35,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 21:16:35,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:36,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:37,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054862878] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:37,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:37,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 41 [2023-11-06 21:16:37,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882061652] [2023-11-06 21:16:37,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:37,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 21:16:37,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:37,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 21:16:37,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 21:16:37,326 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 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 21:16:37,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:37,960 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2023-11-06 21:16:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 21:16:37,960 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 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) Word has length 37 [2023-11-06 21:16:37,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:37,961 INFO L225 Difference]: With dead ends: 84 [2023-11-06 21:16:37,961 INFO L226 Difference]: Without dead ends: 59 [2023-11-06 21:16:37,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=500, Invalid=2152, Unknown=0, NotChecked=0, Total=2652 [2023-11-06 21:16:37,963 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 66 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:37,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 127 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:16:37,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-06 21:16:37,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2023-11-06 21:16:37,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 56 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 21:16:37,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-11-06 21:16:37,980 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 37 [2023-11-06 21:16:37,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:37,980 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-11-06 21:16:37,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 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 21:16:37,981 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-11-06 21:16:37,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 21:16:37,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:37,982 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:37,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:38,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:38,188 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:38,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:38,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2000794534, now seen corresponding path program 7 times [2023-11-06 21:16:38,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:38,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248755607] [2023-11-06 21:16:38,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:38,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:38,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:38,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248755607] [2023-11-06 21:16:38,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248755607] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:38,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518989447] [2023-11-06 21:16:38,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:16:38,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:38,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:38,779 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:38,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 21:16:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:38,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 21:16:38,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:39,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:39,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518989447] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:39,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:39,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 40 [2023-11-06 21:16:39,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245718007] [2023-11-06 21:16:39,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:39,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-06 21:16:39,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:39,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-06 21:16:39,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 21:16:39,936 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 40 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 21:16:40,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:40,437 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2023-11-06 21:16:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 21:16:40,438 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 40 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) Word has length 37 [2023-11-06 21:16:40,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:40,439 INFO L225 Difference]: With dead ends: 73 [2023-11-06 21:16:40,439 INFO L226 Difference]: Without dead ends: 66 [2023-11-06 21:16:40,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=525, Invalid=2127, Unknown=0, NotChecked=0, Total=2652 [2023-11-06 21:16:40,441 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:40,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 79 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:16:40,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-06 21:16:40,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2023-11-06 21:16:40,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 21:16:40,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2023-11-06 21:16:40,461 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 37 [2023-11-06 21:16:40,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:40,461 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2023-11-06 21:16:40,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 40 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 21:16:40,462 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2023-11-06 21:16:40,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-06 21:16:40,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:40,462 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:40,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:40,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:40,676 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:40,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:40,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2010526532, now seen corresponding path program 8 times [2023-11-06 21:16:40,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:40,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580497753] [2023-11-06 21:16:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:40,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:41,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:41,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580497753] [2023-11-06 21:16:41,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580497753] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:41,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712793059] [2023-11-06 21:16:41,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:16:41,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:41,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:41,169 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:41,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 21:16:41,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:16:41,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:41,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:16:41,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:41,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:42,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712793059] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:42,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:42,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2023-11-06 21:16:42,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554398359] [2023-11-06 21:16:42,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:42,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-06 21:16:42,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:42,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-06 21:16:42,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1189, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 21:16:42,312 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 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 21:16:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:42,769 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2023-11-06 21:16:42,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 21:16:42,769 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 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) Word has length 39 [2023-11-06 21:16:42,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:42,770 INFO L225 Difference]: With dead ends: 84 [2023-11-06 21:16:42,770 INFO L226 Difference]: Without dead ends: 59 [2023-11-06 21:16:42,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=458, Invalid=1798, Unknown=0, NotChecked=0, Total=2256 [2023-11-06 21:16:42,772 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:42,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 107 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:16:42,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-06 21:16:42,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2023-11-06 21:16:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 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 21:16:42,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2023-11-06 21:16:42,793 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 39 [2023-11-06 21:16:42,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:42,794 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2023-11-06 21:16:42,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 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 21:16:42,794 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2023-11-06 21:16:42,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-06 21:16:42,795 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:42,795 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:42,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-06 21:16:42,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 21:16:42,996 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:42,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:42,996 INFO L85 PathProgramCache]: Analyzing trace with hash -963590236, now seen corresponding path program 8 times [2023-11-06 21:16:42,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:42,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522466561] [2023-11-06 21:16:42,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:42,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:43,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:43,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522466561] [2023-11-06 21:16:43,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522466561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:43,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495780101] [2023-11-06 21:16:43,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:16:43,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:43,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:43,533 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:43,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 21:16:43,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:16:43,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:43,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:16:43,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:44,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:44,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495780101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:44,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:44,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2023-11-06 21:16:44,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795921874] [2023-11-06 21:16:44,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:44,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-06 21:16:44,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:44,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-06 21:16:44,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1184, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 21:16:44,670 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:45,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:45,010 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2023-11-06 21:16:45,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 21:16:45,011 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-06 21:16:45,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:45,012 INFO L225 Difference]: With dead ends: 69 [2023-11-06 21:16:45,012 INFO L226 Difference]: Without dead ends: 62 [2023-11-06 21:16:45,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=482, Invalid=1774, Unknown=0, NotChecked=0, Total=2256 [2023-11-06 21:16:45,014 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:45,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 58 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:16:45,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-06 21:16:45,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2023-11-06 21:16:45,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 21:16:45,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2023-11-06 21:16:45,028 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 39 [2023-11-06 21:16:45,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:45,028 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2023-11-06 21:16:45,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:45,028 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2023-11-06 21:16:45,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-06 21:16:45,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:45,029 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:45,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:45,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:45,229 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:45,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:45,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1666684738, now seen corresponding path program 9 times [2023-11-06 21:16:45,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:45,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106367905] [2023-11-06 21:16:45,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:45,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:45,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:45,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106367905] [2023-11-06 21:16:45,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106367905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:45,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915502858] [2023-11-06 21:16:45,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:16:45,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:45,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:45,899 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:45,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 21:16:45,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-06 21:16:45,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:45,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:16:45,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:46,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:47,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915502858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:47,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:47,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 46 [2023-11-06 21:16:47,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353977707] [2023-11-06 21:16:47,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:47,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-06 21:16:47,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:47,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-06 21:16:47,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1696, Unknown=0, NotChecked=0, Total=2070 [2023-11-06 21:16:47,376 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:48,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:48,018 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2023-11-06 21:16:48,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 21:16:48,019 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-06 21:16:48,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:48,020 INFO L225 Difference]: With dead ends: 92 [2023-11-06 21:16:48,020 INFO L226 Difference]: Without dead ends: 65 [2023-11-06 21:16:48,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 46 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=618, Invalid=2688, Unknown=0, NotChecked=0, Total=3306 [2023-11-06 21:16:48,022 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 66 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:48,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 105 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:16:48,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-06 21:16:48,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2023-11-06 21:16:48,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2023-11-06 21:16:48,039 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 41 [2023-11-06 21:16:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:48,040 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2023-11-06 21:16:48,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2023-11-06 21:16:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-06 21:16:48,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:48,041 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:48,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-06 21:16:48,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 21:16:48,244 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:48,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:48,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1475412930, now seen corresponding path program 9 times [2023-11-06 21:16:48,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:48,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719960383] [2023-11-06 21:16:48,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:48,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:48,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:48,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719960383] [2023-11-06 21:16:48,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719960383] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:48,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550344406] [2023-11-06 21:16:48,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:16:48,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:48,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:48,948 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:48,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 21:16:49,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-06 21:16:49,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:49,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:16:49,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:49,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:50,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550344406] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:50,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:50,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 45 [2023-11-06 21:16:50,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229531863] [2023-11-06 21:16:50,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:50,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-06 21:16:50,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:50,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-06 21:16:50,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 21:16:50,461 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:50,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:50,956 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2023-11-06 21:16:50,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 21:16:50,957 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-06 21:16:50,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:50,958 INFO L225 Difference]: With dead ends: 79 [2023-11-06 21:16:50,958 INFO L226 Difference]: Without dead ends: 72 [2023-11-06 21:16:50,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 48 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2023-11-06 21:16:50,959 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 183 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:50,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 73 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:16:50,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-06 21:16:50,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2023-11-06 21:16:50,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.078125) internal successors, (69), 64 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 21:16:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2023-11-06 21:16:50,976 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 41 [2023-11-06 21:16:50,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:50,976 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2023-11-06 21:16:50,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2023-11-06 21:16:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-06 21:16:50,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:50,978 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:50,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:51,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 21:16:51,184 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:51,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:51,184 INFO L85 PathProgramCache]: Analyzing trace with hash -370021280, now seen corresponding path program 10 times [2023-11-06 21:16:51,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:51,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204382312] [2023-11-06 21:16:51,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:51,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:51,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:51,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204382312] [2023-11-06 21:16:51,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204382312] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:51,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410551917] [2023-11-06 21:16:51,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:16:51,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:51,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:51,787 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:51,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 21:16:51,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:16:51,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:51,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:16:51,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:52,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:53,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410551917] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:53,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:53,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 44 [2023-11-06 21:16:53,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602126159] [2023-11-06 21:16:53,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:53,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 21:16:53,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:53,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 21:16:53,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 21:16:53,081 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:53,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:53,653 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2023-11-06 21:16:53,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 21:16:53,654 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-06 21:16:53,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:53,655 INFO L225 Difference]: With dead ends: 92 [2023-11-06 21:16:53,655 INFO L226 Difference]: Without dead ends: 65 [2023-11-06 21:16:53,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=575, Invalid=2287, Unknown=0, NotChecked=0, Total=2862 [2023-11-06 21:16:53,657 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:53,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 110 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:16:53,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-06 21:16:53,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2023-11-06 21:16:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2023-11-06 21:16:53,679 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 43 [2023-11-06 21:16:53,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:53,680 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2023-11-06 21:16:53,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:16:53,680 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2023-11-06 21:16:53,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-06 21:16:53,680 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:53,681 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:53,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-06 21:16:53,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 21:16:53,881 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:53,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:53,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1476378560, now seen corresponding path program 10 times [2023-11-06 21:16:53,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:53,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046639101] [2023-11-06 21:16:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:53,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:54,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:54,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046639101] [2023-11-06 21:16:54,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046639101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:54,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303938457] [2023-11-06 21:16:54,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:16:54,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:54,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:54,489 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:54,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 21:16:54,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:16:54,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:54,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:16:54,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:55,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:55,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303938457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:55,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:55,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 44 [2023-11-06 21:16:55,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397608230] [2023-11-06 21:16:55,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:55,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 21:16:55,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:55,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 21:16:55,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 21:16:55,772 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 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 21:16:56,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:56,161 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2023-11-06 21:16:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 21:16:56,162 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 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) Word has length 43 [2023-11-06 21:16:56,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:56,162 INFO L225 Difference]: With dead ends: 75 [2023-11-06 21:16:56,163 INFO L226 Difference]: Without dead ends: 68 [2023-11-06 21:16:56,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 53 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=604, Invalid=2258, Unknown=0, NotChecked=0, Total=2862 [2023-11-06 21:16:56,165 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 139 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:56,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 67 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:16:56,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-06 21:16:56,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2023-11-06 21:16:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 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 21:16:56,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2023-11-06 21:16:56,183 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 43 [2023-11-06 21:16:56,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:56,183 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2023-11-06 21:16:56,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 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 21:16:56,184 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2023-11-06 21:16:56,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-06 21:16:56,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:56,185 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:56,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-06 21:16:56,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 21:16:56,388 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:56,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:56,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1496622882, now seen corresponding path program 11 times [2023-11-06 21:16:56,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:56,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204890855] [2023-11-06 21:16:56,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:56,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:57,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:57,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204890855] [2023-11-06 21:16:57,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204890855] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:16:57,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199658915] [2023-11-06 21:16:57,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:16:57,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:57,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:57,095 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:57,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 21:16:57,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-06 21:16:57,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:16:57,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 21:16:57,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:58,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:16:58,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199658915] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:58,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:16:58,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 51 [2023-11-06 21:16:58,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246048056] [2023-11-06 21:16:58,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:58,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-06 21:16:58,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:58,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-06 21:16:58,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=2092, Unknown=0, NotChecked=0, Total=2550 [2023-11-06 21:16:58,834 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 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 21:16:59,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:59,459 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2023-11-06 21:16:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 21:16:59,460 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 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) Word has length 45 [2023-11-06 21:16:59,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:59,461 INFO L225 Difference]: With dead ends: 100 [2023-11-06 21:16:59,461 INFO L226 Difference]: Without dead ends: 71 [2023-11-06 21:16:59,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 51 SyntacticMatches, 10 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=750, Invalid=3282, Unknown=0, NotChecked=0, Total=4032 [2023-11-06 21:16:59,463 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 65 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:59,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 92 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:16:59,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-06 21:16:59,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2023-11-06 21:16:59,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 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 21:16:59,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2023-11-06 21:16:59,490 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 45 [2023-11-06 21:16:59,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:59,491 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2023-11-06 21:16:59,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 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 21:16:59,491 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2023-11-06 21:16:59,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-06 21:16:59,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:59,492 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:59,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:59,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 21:16:59,699 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:59,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:59,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1491841570, now seen corresponding path program 11 times [2023-11-06 21:16:59,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:59,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833945009] [2023-11-06 21:16:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:59,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:00,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:00,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833945009] [2023-11-06 21:17:00,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833945009] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:00,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917145072] [2023-11-06 21:17:00,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:17:00,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:00,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:00,391 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:00,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 21:17:00,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-06 21:17:00,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:17:00,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 21:17:00,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:01,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:01,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917145072] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:01,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:01,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 50 [2023-11-06 21:17:01,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199166399] [2023-11-06 21:17:01,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:01,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-06 21:17:01,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:01,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-06 21:17:01,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1994, Unknown=0, NotChecked=0, Total=2450 [2023-11-06 21:17:01,893 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 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 21:17:02,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:17:02,406 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2023-11-06 21:17:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 21:17:02,407 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 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) Word has length 45 [2023-11-06 21:17:02,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:17:02,408 INFO L225 Difference]: With dead ends: 85 [2023-11-06 21:17:02,408 INFO L226 Difference]: Without dead ends: 78 [2023-11-06 21:17:02,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 10 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=787, Invalid=3245, Unknown=0, NotChecked=0, Total=4032 [2023-11-06 21:17:02,409 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 181 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:17:02,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 70 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:17:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-06 21:17:02,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2023-11-06 21:17:02,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 21:17:02,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2023-11-06 21:17:02,431 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 45 [2023-11-06 21:17:02,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:17:02,432 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2023-11-06 21:17:02,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 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 21:17:02,432 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2023-11-06 21:17:02,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-06 21:17:02,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:17:02,433 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:02,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:02,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 21:17:02,633 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:17:02,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:02,634 INFO L85 PathProgramCache]: Analyzing trace with hash -43311236, now seen corresponding path program 12 times [2023-11-06 21:17:02,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:02,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327128610] [2023-11-06 21:17:02,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:02,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:03,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:03,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327128610] [2023-11-06 21:17:03,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327128610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:03,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860830693] [2023-11-06 21:17:03,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:17:03,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:03,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:03,269 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:03,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 21:17:03,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-06 21:17:03,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:17:03,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 21:17:03,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:04,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:04,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860830693] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:04,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:04,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 49 [2023-11-06 21:17:04,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542678829] [2023-11-06 21:17:04,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:04,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-06 21:17:04,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:04,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-06 21:17:04,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=1898, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 21:17:04,730 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 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 21:17:05,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:17:05,240 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2023-11-06 21:17:05,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 21:17:05,241 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 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) Word has length 47 [2023-11-06 21:17:05,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:17:05,241 INFO L225 Difference]: With dead ends: 100 [2023-11-06 21:17:05,241 INFO L226 Difference]: Without dead ends: 71 [2023-11-06 21:17:05,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=706, Invalid=2834, Unknown=0, NotChecked=0, Total=3540 [2023-11-06 21:17:05,243 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:17:05,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 121 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:17:05,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-06 21:17:05,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2023-11-06 21:17:05,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 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 21:17:05,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2023-11-06 21:17:05,264 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 47 [2023-11-06 21:17:05,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:17:05,265 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2023-11-06 21:17:05,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 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 21:17:05,265 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2023-11-06 21:17:05,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-06 21:17:05,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:17:05,265 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:05,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:05,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:05,470 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:17:05,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:05,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1529130276, now seen corresponding path program 12 times [2023-11-06 21:17:05,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:05,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146253508] [2023-11-06 21:17:05,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:05,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:06,175 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 21:17:06,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:06,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146253508] [2023-11-06 21:17:06,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146253508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:06,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676974471] [2023-11-06 21:17:06,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:17:06,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:06,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:06,177 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:06,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 21:17:06,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-06 21:17:06,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:17:06,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 21:17:06,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:06,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:07,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676974471] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:07,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:07,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 49 [2023-11-06 21:17:07,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919460248] [2023-11-06 21:17:07,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:07,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-06 21:17:07,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:07,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-06 21:17:07,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1891, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 21:17:07,641 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 49 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:17:08,096 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2023-11-06 21:17:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 21:17:08,097 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 49 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-06 21:17:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:17:08,097 INFO L225 Difference]: With dead ends: 81 [2023-11-06 21:17:08,098 INFO L226 Difference]: Without dead ends: 74 [2023-11-06 21:17:08,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 57 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1811 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=740, Invalid=2800, Unknown=0, NotChecked=0, Total=3540 [2023-11-06 21:17:08,099 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 165 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:17:08,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 78 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:17:08,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-06 21:17:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2023-11-06 21:17:08,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 21:17:08,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2023-11-06 21:17:08,122 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 47 [2023-11-06 21:17:08,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:17:08,122 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2023-11-06 21:17:08,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 49 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:08,123 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2023-11-06 21:17:08,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-06 21:17:08,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:17:08,123 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:08,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:08,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:08,329 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:17:08,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:08,329 INFO L85 PathProgramCache]: Analyzing trace with hash -651414406, now seen corresponding path program 13 times [2023-11-06 21:17:08,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:08,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086566968] [2023-11-06 21:17:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:08,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:09,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:09,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086566968] [2023-11-06 21:17:09,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086566968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:09,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080800109] [2023-11-06 21:17:09,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:17:09,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:09,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:09,116 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:09,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 21:17:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:09,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 21:17:09,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:10,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:10,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080800109] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:10,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:10,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 56 [2023-11-06 21:17:10,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091698450] [2023-11-06 21:17:10,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:10,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-06 21:17:10,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:10,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-06 21:17:10,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=2529, Unknown=0, NotChecked=0, Total=3080 [2023-11-06 21:17:10,942 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 56 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 21:17:11,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:17:11,690 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2023-11-06 21:17:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 21:17:11,690 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 56 states have internal predecessors, (111), 0 states have call successors, (0), 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 49 [2023-11-06 21:17:11,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:17:11,693 INFO L225 Difference]: With dead ends: 108 [2023-11-06 21:17:11,693 INFO L226 Difference]: Without dead ends: 77 [2023-11-06 21:17:11,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 55 SyntacticMatches, 11 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=896, Invalid=3934, Unknown=0, NotChecked=0, Total=4830 [2023-11-06 21:17:11,695 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:17:11,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 134 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:17:11,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-06 21:17:11,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2023-11-06 21:17:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 74 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:11,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2023-11-06 21:17:11,727 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 49 [2023-11-06 21:17:11,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:17:11,727 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2023-11-06 21:17:11,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 56 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 21:17:11,728 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2023-11-06 21:17:11,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-06 21:17:11,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:17:11,728 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:11,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:11,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:11,929 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:17:11,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:11,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1218145798, now seen corresponding path program 13 times [2023-11-06 21:17:11,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:11,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677789597] [2023-11-06 21:17:11,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:11,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:12,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:12,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677789597] [2023-11-06 21:17:12,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677789597] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:12,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4390235] [2023-11-06 21:17:12,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:17:12,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:12,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:12,762 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:12,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 21:17:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:12,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 21:17:12,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:13,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:14,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4390235] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:14,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:14,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 55 [2023-11-06 21:17:14,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370287736] [2023-11-06 21:17:14,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:14,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-06 21:17:14,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:14,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-06 21:17:14,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=2420, Unknown=0, NotChecked=0, Total=2970 [2023-11-06 21:17:14,460 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 21:17:15,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:17:15,075 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2023-11-06 21:17:15,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 21:17:15,076 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 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 49 [2023-11-06 21:17:15,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:17:15,077 INFO L225 Difference]: With dead ends: 91 [2023-11-06 21:17:15,077 INFO L226 Difference]: Without dead ends: 84 [2023-11-06 21:17:15,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 56 SyntacticMatches, 11 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=939, Invalid=3891, Unknown=0, NotChecked=0, Total=4830 [2023-11-06 21:17:15,078 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:17:15,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 93 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:17:15,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-06 21:17:15,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2023-11-06 21:17:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 76 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 21:17:15,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2023-11-06 21:17:15,107 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 49 [2023-11-06 21:17:15,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:17:15,107 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2023-11-06 21:17:15,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 21:17:15,107 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2023-11-06 21:17:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-06 21:17:15,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:17:15,108 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:15,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:15,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-06 21:17:15,309 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:17:15,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:15,309 INFO L85 PathProgramCache]: Analyzing trace with hash 985320600, now seen corresponding path program 14 times [2023-11-06 21:17:15,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:15,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481568219] [2023-11-06 21:17:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:15,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:15,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:15,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481568219] [2023-11-06 21:17:15,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481568219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:15,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455194016] [2023-11-06 21:17:15,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:17:15,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:15,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:15,977 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:15,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 21:17:16,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:17:16,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:17:16,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 21:17:16,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:16,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:17,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455194016] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:17,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:17,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 54 [2023-11-06 21:17:17,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386775600] [2023-11-06 21:17:17,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:17,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-06 21:17:17,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:17,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-06 21:17:17,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2314, Unknown=0, NotChecked=0, Total=2862 [2023-11-06 21:17:17,612 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 21:17:18,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:17:18,244 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2023-11-06 21:17:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 21:17:18,244 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 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 21:17:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:17:18,245 INFO L225 Difference]: With dead ends: 108 [2023-11-06 21:17:18,245 INFO L226 Difference]: Without dead ends: 77 [2023-11-06 21:17:18,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 10 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=851, Invalid=3439, Unknown=0, NotChecked=0, Total=4290 [2023-11-06 21:17:18,246 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:17:18,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 104 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:17:18,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-06 21:17:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2023-11-06 21:17:18,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2023-11-06 21:17:18,282 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 51 [2023-11-06 21:17:18,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:17:18,282 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2023-11-06 21:17:18,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 21:17:18,283 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2023-11-06 21:17:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-06 21:17:18,283 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:17:18,284 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:18,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:18,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:18,490 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:17:18,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:18,490 INFO L85 PathProgramCache]: Analyzing trace with hash -91029640, now seen corresponding path program 14 times [2023-11-06 21:17:18,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:18,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836085761] [2023-11-06 21:17:18,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:18,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:19,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:19,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836085761] [2023-11-06 21:17:19,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836085761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:19,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543715047] [2023-11-06 21:17:19,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:17:19,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:19,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:19,356 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:19,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 21:17:19,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:17:19,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:17:19,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 21:17:19,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:20,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:21,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543715047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:21,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:21,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 54 [2023-11-06 21:17:21,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806780551] [2023-11-06 21:17:21,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:21,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-06 21:17:21,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:21,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-06 21:17:21,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=2306, Unknown=0, NotChecked=0, Total=2862 [2023-11-06 21:17:21,090 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 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 21:17:21,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:17:21,633 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2023-11-06 21:17:21,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 21:17:21,633 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 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 51 [2023-11-06 21:17:21,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:17:21,634 INFO L225 Difference]: With dead ends: 87 [2023-11-06 21:17:21,634 INFO L226 Difference]: Without dead ends: 80 [2023-11-06 21:17:21,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 61 SyntacticMatches, 11 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=890, Invalid=3400, Unknown=0, NotChecked=0, Total=4290 [2023-11-06 21:17:21,636 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:17:21,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 74 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:17:21,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-06 21:17:21,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2023-11-06 21:17:21,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 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 21:17:21,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2023-11-06 21:17:21,670 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 51 [2023-11-06 21:17:21,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:17:21,670 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2023-11-06 21:17:21,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 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 21:17:21,670 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2023-11-06 21:17:21,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-06 21:17:21,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:17:21,671 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:21,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:21,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:21,871 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:17:21,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:21,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1616172522, now seen corresponding path program 15 times [2023-11-06 21:17:21,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:21,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125342068] [2023-11-06 21:17:21,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:21,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:22,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:22,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125342068] [2023-11-06 21:17:22,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125342068] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:22,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397048679] [2023-11-06 21:17:22,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:17:22,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:22,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:22,755 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:22,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 21:17:22,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-06 21:17:22,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:17:22,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 21:17:22,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:23,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:24,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397048679] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:24,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:24,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 61 [2023-11-06 21:17:24,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369506838] [2023-11-06 21:17:24,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:24,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-06 21:17:24,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:24,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-06 21:17:24,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=3007, Unknown=0, NotChecked=0, Total=3660 [2023-11-06 21:17:24,842 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 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 21:17:25,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:17:25,698 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2023-11-06 21:17:25,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 21:17:25,698 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 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) Word has length 53 [2023-11-06 21:17:25,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:17:25,699 INFO L225 Difference]: With dead ends: 116 [2023-11-06 21:17:25,699 INFO L226 Difference]: Without dead ends: 83 [2023-11-06 21:17:25,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 58 SyntacticMatches, 13 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1056, Invalid=4644, Unknown=0, NotChecked=0, Total=5700 [2023-11-06 21:17:25,701 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 40 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:17:25,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 166 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:17:25,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-06 21:17:25,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2023-11-06 21:17:25,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0625) internal successors, (85), 80 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 21:17:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2023-11-06 21:17:25,747 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 53 [2023-11-06 21:17:25,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:17:25,747 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2023-11-06 21:17:25,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 61 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 21:17:25,748 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2023-11-06 21:17:25,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-06 21:17:25,748 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:17:25,748 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:25,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:25,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:25,955 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:17:25,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:25,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1650798570, now seen corresponding path program 15 times [2023-11-06 21:17:25,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:25,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825749258] [2023-11-06 21:17:25,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:25,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:26,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:26,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825749258] [2023-11-06 21:17:26,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825749258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:26,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885102914] [2023-11-06 21:17:26,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:17:26,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:26,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:26,953 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:26,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 21:17:27,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-06 21:17:27,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:17:27,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 21:17:27,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:28,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:28,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885102914] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:28,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:28,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 60 [2023-11-06 21:17:28,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376501622] [2023-11-06 21:17:28,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:28,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-06 21:17:28,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:28,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-06 21:17:28,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=2887, Unknown=0, NotChecked=0, Total=3540 [2023-11-06 21:17:28,938 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 60 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 21:17:29,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:17:29,619 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2023-11-06 21:17:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 21:17:29,619 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 60 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) Word has length 53 [2023-11-06 21:17:29,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:17:29,620 INFO L225 Difference]: With dead ends: 97 [2023-11-06 21:17:29,620 INFO L226 Difference]: Without dead ends: 90 [2023-11-06 21:17:29,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 60 SyntacticMatches, 12 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1105, Invalid=4595, Unknown=0, NotChecked=0, Total=5700 [2023-11-06 21:17:29,621 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 135 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:17:29,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 87 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:17:29,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-06 21:17:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2023-11-06 21:17:29,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 82 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) [2023-11-06 21:17:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2023-11-06 21:17:29,659 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 53 [2023-11-06 21:17:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:17:29,659 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2023-11-06 21:17:29,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 60 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 21:17:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2023-11-06 21:17:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-06 21:17:29,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:17:29,660 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:29,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:29,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-06 21:17:29,864 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:17:29,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:29,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1817834420, now seen corresponding path program 16 times [2023-11-06 21:17:29,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:29,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942610044] [2023-11-06 21:17:29,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:29,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:30,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:30,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942610044] [2023-11-06 21:17:30,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942610044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:30,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693611867] [2023-11-06 21:17:30,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:17:30,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:30,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:30,625 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:30,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-06 21:17:30,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:17:30,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:17:30,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 21:17:30,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:31,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:32,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693611867] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:32,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:32,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 59 [2023-11-06 21:17:32,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922680554] [2023-11-06 21:17:32,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:32,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-06 21:17:32,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:32,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-06 21:17:32,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2771, Unknown=0, NotChecked=0, Total=3422 [2023-11-06 21:17:32,533 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 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 21:17:33,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:17:33,153 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2023-11-06 21:17:33,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 21:17:33,154 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 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) Word has length 55 [2023-11-06 21:17:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:17:33,155 INFO L225 Difference]: With dead ends: 116 [2023-11-06 21:17:33,155 INFO L226 Difference]: Without dead ends: 83 [2023-11-06 21:17:33,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 65 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2705 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1010, Invalid=4102, Unknown=0, NotChecked=0, Total=5112 [2023-11-06 21:17:33,156 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:17:33,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 96 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:17:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-06 21:17:33,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2023-11-06 21:17:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 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 21:17:33,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2023-11-06 21:17:33,190 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 55 [2023-11-06 21:17:33,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:17:33,191 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2023-11-06 21:17:33,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 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 21:17:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2023-11-06 21:17:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-06 21:17:33,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:17:33,192 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:33,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:33,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:33,396 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:17:33,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:33,396 INFO L85 PathProgramCache]: Analyzing trace with hash -895990252, now seen corresponding path program 16 times [2023-11-06 21:17:33,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:33,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100253984] [2023-11-06 21:17:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:33,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:34,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:34,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100253984] [2023-11-06 21:17:34,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100253984] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:34,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688881373] [2023-11-06 21:17:34,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:17:34,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:34,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:34,379 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:34,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-06 21:17:34,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:17:34,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:17:34,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 21:17:34,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:35,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:36,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688881373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:36,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:36,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 59 [2023-11-06 21:17:36,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003292673] [2023-11-06 21:17:36,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:36,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-06 21:17:36,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:36,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-06 21:17:36,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=2762, Unknown=0, NotChecked=0, Total=3422 [2023-11-06 21:17:36,300 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 21:17:36,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:17:36,906 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2023-11-06 21:17:36,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 21:17:36,907 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 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 21:17:36,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:17:36,907 INFO L225 Difference]: With dead ends: 93 [2023-11-06 21:17:36,907 INFO L226 Difference]: Without dead ends: 86 [2023-11-06 21:17:36,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 65 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2712 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1054, Invalid=4058, Unknown=0, NotChecked=0, Total=5112 [2023-11-06 21:17:36,909 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 196 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:17:36,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 86 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:17:36,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-06 21:17:36,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2023-11-06 21:17:36,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 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) [2023-11-06 21:17:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2023-11-06 21:17:36,953 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 55 [2023-11-06 21:17:36,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:17:36,954 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2023-11-06 21:17:36,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 21:17:36,954 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2023-11-06 21:17:36,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-06 21:17:36,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:17:36,955 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:36,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:37,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-06 21:17:37,158 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:17:37,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:37,158 INFO L85 PathProgramCache]: Analyzing trace with hash -2089207374, now seen corresponding path program 17 times [2023-11-06 21:17:37,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:37,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558779933] [2023-11-06 21:17:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:37,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:38,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:38,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558779933] [2023-11-06 21:17:38,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558779933] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:38,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170157963] [2023-11-06 21:17:38,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:17:38,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:38,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:38,180 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:38,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-06 21:17:38,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-06 21:17:38,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:17:38,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 21:17:38,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:39,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:40,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170157963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:40,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:40,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 66 [2023-11-06 21:17:40,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233056083] [2023-11-06 21:17:40,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:40,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-11-06 21:17:40,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:40,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-11-06 21:17:40,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=3526, Unknown=0, NotChecked=0, Total=4290 [2023-11-06 21:17:40,564 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 66 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:41,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:17:41,398 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2023-11-06 21:17:41,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 21:17:41,399 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 66 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-06 21:17:41,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:17:41,401 INFO L225 Difference]: With dead ends: 124 [2023-11-06 21:17:41,401 INFO L226 Difference]: Without dead ends: 89 [2023-11-06 21:17:41,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 62 SyntacticMatches, 14 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3465 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1230, Invalid=5412, Unknown=0, NotChecked=0, Total=6642 [2023-11-06 21:17:41,403 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:17:41,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 122 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:17:41,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-06 21:17:41,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2023-11-06 21:17:41,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.058139534883721) internal successors, (91), 86 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:41,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2023-11-06 21:17:41,453 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 57 [2023-11-06 21:17:41,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:17:41,454 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2023-11-06 21:17:41,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 66 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2023-11-06 21:17:41,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-06 21:17:41,456 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:17:41,456 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:41,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:41,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-06 21:17:41,663 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:17:41,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:41,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1871706062, now seen corresponding path program 17 times [2023-11-06 21:17:41,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:41,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426843206] [2023-11-06 21:17:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:41,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:42,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:42,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426843206] [2023-11-06 21:17:42,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426843206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:42,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193336022] [2023-11-06 21:17:42,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:17:42,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:42,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:42,661 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:42,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-06 21:17:42,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-06 21:17:42,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:17:42,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 21:17:42,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:43,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:44,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193336022] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:44,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:44,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 65 [2023-11-06 21:17:44,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791400063] [2023-11-06 21:17:44,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:44,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-06 21:17:44,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:44,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-06 21:17:44,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3395, Unknown=0, NotChecked=0, Total=4160 [2023-11-06 21:17:44,897 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 65 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:45,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:17:45,755 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2023-11-06 21:17:45,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 21:17:45,756 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 65 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-11-06 21:17:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:17:45,756 INFO L225 Difference]: With dead ends: 103 [2023-11-06 21:17:45,757 INFO L226 Difference]: Without dead ends: 96 [2023-11-06 21:17:45,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 64 SyntacticMatches, 13 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3394 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1285, Invalid=5357, Unknown=0, NotChecked=0, Total=6642 [2023-11-06 21:17:45,758 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 112 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:17:45,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 104 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:17:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-06 21:17:45,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2023-11-06 21:17:45,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 88 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 21:17:45,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2023-11-06 21:17:45,792 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 57 [2023-11-06 21:17:45,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:17:45,793 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2023-11-06 21:17:45,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 65 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:45,793 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2023-11-06 21:17:45,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 21:17:45,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:17:45,794 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:45,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:45,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:45,995 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:17:45,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:45,996 INFO L85 PathProgramCache]: Analyzing trace with hash -20867888, now seen corresponding path program 18 times [2023-11-06 21:17:45,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:45,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446125282] [2023-11-06 21:17:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:45,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 102 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:46,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:46,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446125282] [2023-11-06 21:17:46,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446125282] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:46,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216795141] [2023-11-06 21:17:46,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:17:46,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:46,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:46,935 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:46,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-06 21:17:47,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-11-06 21:17:47,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:17:47,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 21:17:47,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:48,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:49,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216795141] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:49,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:49,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 64 [2023-11-06 21:17:49,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181741541] [2023-11-06 21:17:49,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:49,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-06 21:17:49,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:49,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-06 21:17:49,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=3269, Unknown=0, NotChecked=0, Total=4032 [2023-11-06 21:17:49,243 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:49,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:17:49,924 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2023-11-06 21:17:49,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 21:17:49,924 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-06 21:17:49,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:17:49,925 INFO L225 Difference]: With dead ends: 124 [2023-11-06 21:17:49,925 INFO L226 Difference]: Without dead ends: 89 [2023-11-06 21:17:49,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 70 SyntacticMatches, 12 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3187 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1183, Invalid=4823, Unknown=0, NotChecked=0, Total=6006 [2023-11-06 21:17:49,926 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:17:49,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 134 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:17:49,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-06 21:17:49,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2023-11-06 21:17:49,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:49,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2023-11-06 21:17:49,967 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 59 [2023-11-06 21:17:49,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:17:49,967 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2023-11-06 21:17:49,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2023-11-06 21:17:49,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 21:17:49,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:17:49,968 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:49,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:50,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:50,172 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:17:50,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:50,172 INFO L85 PathProgramCache]: Analyzing trace with hash -94624080, now seen corresponding path program 18 times [2023-11-06 21:17:50,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:50,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135068600] [2023-11-06 21:17:50,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:50,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:51,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:51,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135068600] [2023-11-06 21:17:51,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135068600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:51,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935073295] [2023-11-06 21:17:51,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:17:51,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:51,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:51,127 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:51,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-06 21:17:51,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-11-06 21:17:51,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:17:51,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 21:17:51,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:52,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:53,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935073295] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:53,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:53,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 64 [2023-11-06 21:17:53,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073512741] [2023-11-06 21:17:53,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:53,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-06 21:17:53,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:53,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-06 21:17:53,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=3259, Unknown=0, NotChecked=0, Total=4032 [2023-11-06 21:17:53,286 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 64 states, 64 states have (on average 2.078125) internal successors, (133), 64 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 21:17:53,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:17:53,936 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2023-11-06 21:17:53,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 21:17:53,937 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 64 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) Word has length 59 [2023-11-06 21:17:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:17:53,938 INFO L225 Difference]: With dead ends: 99 [2023-11-06 21:17:53,938 INFO L226 Difference]: Without dead ends: 92 [2023-11-06 21:17:53,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 69 SyntacticMatches, 13 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3230 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1232, Invalid=4774, Unknown=0, NotChecked=0, Total=6006 [2023-11-06 21:17:53,939 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 96 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:17:53,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 81 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:17:53,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-06 21:17:53,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2023-11-06 21:17:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:17:53,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2023-11-06 21:17:53,994 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 59 [2023-11-06 21:17:53,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:17:53,994 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2023-11-06 21:17:53,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 64 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 21:17:53,995 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2023-11-06 21:17:53,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-06 21:17:53,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:17:53,996 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:54,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:54,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:54,202 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:17:54,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:54,202 INFO L85 PathProgramCache]: Analyzing trace with hash -775462066, now seen corresponding path program 19 times [2023-11-06 21:17:54,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:54,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917765244] [2023-11-06 21:17:54,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:54,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:55,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:17:55,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917765244] [2023-11-06 21:17:55,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917765244] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:17:55,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738621607] [2023-11-06 21:17:55,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:17:55,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:17:55,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:17:55,236 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:17:55,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-06 21:17:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:17:55,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 21:17:55,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:17:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:56,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:17:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:17:57,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738621607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:17:57,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:17:57,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 71 [2023-11-06 21:17:57,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738981212] [2023-11-06 21:17:57,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:17:57,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-06 21:17:57,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:17:57,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-06 21:17:57,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=4086, Unknown=0, NotChecked=0, Total=4970 [2023-11-06 21:17:57,724 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 71 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 21:17:58,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:17:58,792 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2023-11-06 21:17:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 21:17:58,793 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 71 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 61 [2023-11-06 21:17:58,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:17:58,794 INFO L225 Difference]: With dead ends: 132 [2023-11-06 21:17:58,794 INFO L226 Difference]: Without dead ends: 95 [2023-11-06 21:17:58,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 66 SyntacticMatches, 15 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4049 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1418, Invalid=6238, Unknown=0, NotChecked=0, Total=7656 [2023-11-06 21:17:58,795 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:17:58,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 167 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:17:58,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-06 21:17:58,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2023-11-06 21:17:58,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0543478260869565) internal successors, (97), 92 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 21:17:58,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2023-11-06 21:17:58,838 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 61 [2023-11-06 21:17:58,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:17:58,838 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2023-11-06 21:17:58,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 71 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 21:17:58,839 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2023-11-06 21:17:58,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-06 21:17:58,839 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:17:58,839 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:17:58,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-06 21:17:59,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-06 21:17:59,040 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:17:59,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:17:59,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1218263630, now seen corresponding path program 19 times [2023-11-06 21:17:59,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:17:59,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079870614] [2023-11-06 21:17:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:17:59,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:17:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:18:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:00,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:18:00,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079870614] [2023-11-06 21:18:00,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079870614] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:18:00,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548639500] [2023-11-06 21:18:00,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:18:00,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:18:00,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:18:00,100 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:18:00,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-06 21:18:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:18:00,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 21:18:00,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:18:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:01,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:18:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:02,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548639500] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:18:02,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:18:02,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 70 [2023-11-06 21:18:02,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619251853] [2023-11-06 21:18:02,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:18:02,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-06 21:18:02,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:18:02,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-06 21:18:02,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=886, Invalid=3944, Unknown=0, NotChecked=0, Total=4830 [2023-11-06 21:18:02,758 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 70 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 21:18:03,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:18:03,731 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2023-11-06 21:18:03,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 21:18:03,732 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 70 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 61 [2023-11-06 21:18:03,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:18:03,733 INFO L225 Difference]: With dead ends: 109 [2023-11-06 21:18:03,733 INFO L226 Difference]: Without dead ends: 102 [2023-11-06 21:18:03,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 68 SyntacticMatches, 14 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3971 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1479, Invalid=6177, Unknown=0, NotChecked=0, Total=7656 [2023-11-06 21:18:03,734 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:18:03,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 128 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:18:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-06 21:18:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2023-11-06 21:18:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.053191489361702) internal successors, (99), 94 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 21:18:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2023-11-06 21:18:03,780 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 61 [2023-11-06 21:18:03,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:18:03,781 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2023-11-06 21:18:03,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 70 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 21:18:03,781 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2023-11-06 21:18:03,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 21:18:03,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:18:03,782 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:18:03,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-06 21:18:03,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-06 21:18:03,989 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:18:03,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:18:03,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1617604588, now seen corresponding path program 20 times [2023-11-06 21:18:03,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:18:03,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664859118] [2023-11-06 21:18:03,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:18:03,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:18:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:18:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 123 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:04,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:18:04,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664859118] [2023-11-06 21:18:04,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664859118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:18:04,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011626119] [2023-11-06 21:18:04,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:18:04,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:18:04,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:18:04,973 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:18:04,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-06 21:18:05,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:18:05,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:18:05,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 21:18:05,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:18:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:06,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:18:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:07,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011626119] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:18:07,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:18:07,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 69 [2023-11-06 21:18:07,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180090926] [2023-11-06 21:18:07,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:18:07,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-11-06 21:18:07,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:18:07,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-11-06 21:18:07,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=3808, Unknown=0, NotChecked=0, Total=4692 [2023-11-06 21:18:07,538 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 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 21:18:08,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:18:08,372 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2023-11-06 21:18:08,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 21:18:08,373 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 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 63 [2023-11-06 21:18:08,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:18:08,374 INFO L225 Difference]: With dead ends: 132 [2023-11-06 21:18:08,374 INFO L226 Difference]: Without dead ends: 95 [2023-11-06 21:18:08,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 74 SyntacticMatches, 13 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3747 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1370, Invalid=5602, Unknown=0, NotChecked=0, Total=6972 [2023-11-06 21:18:08,377 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 65 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:18:08,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 99 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:18:08,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-06 21:18:08,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2023-11-06 21:18:08,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.043010752688172) internal successors, (97), 93 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 21:18:08,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2023-11-06 21:18:08,438 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 63 [2023-11-06 21:18:08,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:18:08,438 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2023-11-06 21:18:08,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0434782608695654) internal successors, (141), 69 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 21:18:08,439 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2023-11-06 21:18:08,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 21:18:08,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:18:08,440 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:18:08,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-06 21:18:08,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-06 21:18:08,646 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:18:08,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:18:08,647 INFO L85 PathProgramCache]: Analyzing trace with hash 323985740, now seen corresponding path program 20 times [2023-11-06 21:18:08,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:18:08,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594572577] [2023-11-06 21:18:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:18:08,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:18:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:18:09,782 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 100 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:09,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:18:09,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594572577] [2023-11-06 21:18:09,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594572577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:18:09,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101936898] [2023-11-06 21:18:09,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:18:09,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:18:09,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:18:09,784 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:18:09,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-06 21:18:09,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:18:09,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:18:09,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 21:18:09,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:18:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:11,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:18:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:12,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101936898] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:18:12,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:18:12,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 69 [2023-11-06 21:18:12,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555020603] [2023-11-06 21:18:12,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:18:12,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-11-06 21:18:12,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:18:12,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-11-06 21:18:12,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=895, Invalid=3797, Unknown=0, NotChecked=0, Total=4692 [2023-11-06 21:18:12,178 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 69 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:18:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:18:12,971 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2023-11-06 21:18:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 21:18:12,972 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 69 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-11-06 21:18:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:18:12,973 INFO L225 Difference]: With dead ends: 105 [2023-11-06 21:18:12,973 INFO L226 Difference]: Without dead ends: 98 [2023-11-06 21:18:12,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 73 SyntacticMatches, 14 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3793 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1424, Invalid=5548, Unknown=0, NotChecked=0, Total=6972 [2023-11-06 21:18:12,977 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 160 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:18:12,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 96 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:18:12,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-06 21:18:13,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2023-11-06 21:18:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 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 21:18:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2023-11-06 21:18:13,046 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 63 [2023-11-06 21:18:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:18:13,046 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2023-11-06 21:18:13,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 69 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:18:13,047 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2023-11-06 21:18:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-06 21:18:13,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:18:13,048 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:18:13,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-06 21:18:13,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-06 21:18:13,254 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:18:13,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:18:13,255 INFO L85 PathProgramCache]: Analyzing trace with hash 2076616426, now seen corresponding path program 21 times [2023-11-06 21:18:13,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:18:13,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658540218] [2023-11-06 21:18:13,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:18:13,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:18:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:18:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:14,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:18:14,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658540218] [2023-11-06 21:18:14,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658540218] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:18:14,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793965978] [2023-11-06 21:18:14,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:18:14,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:18:14,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:18:14,420 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:18:14,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-06 21:18:14,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-11-06 21:18:14,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:18:14,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 21:18:14,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:18:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:15,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:18:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:17,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793965978] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:18:17,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:18:17,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 76 [2023-11-06 21:18:17,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130357334] [2023-11-06 21:18:17,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:18:17,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-11-06 21:18:17,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:18:17,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-11-06 21:18:17,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1013, Invalid=4687, Unknown=0, NotChecked=0, Total=5700 [2023-11-06 21:18:17,348 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:18:18,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:18:18,461 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2023-11-06 21:18:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 21:18:18,461 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-06 21:18:18,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:18:18,462 INFO L225 Difference]: With dead ends: 140 [2023-11-06 21:18:18,462 INFO L226 Difference]: Without dead ends: 101 [2023-11-06 21:18:18,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 70 SyntacticMatches, 16 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4678 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1620, Invalid=7122, Unknown=0, NotChecked=0, Total=8742 [2023-11-06 21:18:18,464 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:18:18,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 134 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:18:18,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-06 21:18:18,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2023-11-06 21:18:18,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0510204081632653) internal successors, (103), 98 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:18:18,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2023-11-06 21:18:18,527 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 65 [2023-11-06 21:18:18,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:18:18,528 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2023-11-06 21:18:18,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:18:18,528 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2023-11-06 21:18:18,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-06 21:18:18,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:18:18,529 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:18:18,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-06 21:18:18,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-06 21:18:18,733 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:18:18,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:18:18,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1624991338, now seen corresponding path program 21 times [2023-11-06 21:18:18,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:18:18,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926001122] [2023-11-06 21:18:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:18:18,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:18:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:18:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 121 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:19,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:18:19,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926001122] [2023-11-06 21:18:19,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926001122] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:18:19,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448327870] [2023-11-06 21:18:19,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:18:19,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:18:19,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:18:19,969 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:18:19,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-06 21:18:20,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-11-06 21:18:20,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:18:20,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 21:18:20,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:18:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:21,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:18:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:22,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448327870] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:18:22,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:18:22,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 75 [2023-11-06 21:18:22,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938343142] [2023-11-06 21:18:22,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:18:22,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-11-06 21:18:22,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:18:22,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-11-06 21:18:22,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=4534, Unknown=0, NotChecked=0, Total=5550 [2023-11-06 21:18:22,716 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:18:23,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:18:23,779 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2023-11-06 21:18:23,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 21:18:23,780 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-06 21:18:23,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:18:23,781 INFO L225 Difference]: With dead ends: 115 [2023-11-06 21:18:23,781 INFO L226 Difference]: Without dead ends: 108 [2023-11-06 21:18:23,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 72 SyntacticMatches, 15 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4593 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1687, Invalid=7055, Unknown=0, NotChecked=0, Total=8742 [2023-11-06 21:18:23,783 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:18:23,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 125 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:18:23,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-06 21:18:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2023-11-06 21:18:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.05) internal successors, (105), 100 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 21:18:23,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2023-11-06 21:18:23,863 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 65 [2023-11-06 21:18:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:18:23,863 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2023-11-06 21:18:23,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:18:23,863 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2023-11-06 21:18:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-06 21:18:23,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:18:23,864 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:18:23,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-06 21:18:24,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-06 21:18:24,068 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:18:24,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:18:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1640908040, now seen corresponding path program 22 times [2023-11-06 21:18:24,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:18:24,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251149727] [2023-11-06 21:18:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:18:24,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:18:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:18:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 146 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:25,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:18:25,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251149727] [2023-11-06 21:18:25,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251149727] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:18:25,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766422907] [2023-11-06 21:18:25,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:18:25,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:18:25,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:18:25,106 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:18:25,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-06 21:18:25,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:18:25,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:18:25,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 21:18:25,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:18:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:26,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:18:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:27,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766422907] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:18:27,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:18:27,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 74 [2023-11-06 21:18:27,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820851793] [2023-11-06 21:18:27,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:18:27,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-11-06 21:18:27,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:18:27,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-11-06 21:18:27,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1014, Invalid=4388, Unknown=0, NotChecked=0, Total=5402 [2023-11-06 21:18:27,670 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:18:28,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:18:28,521 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2023-11-06 21:18:28,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 21:18:28,522 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-06 21:18:28,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:18:28,523 INFO L225 Difference]: With dead ends: 140 [2023-11-06 21:18:28,523 INFO L226 Difference]: Without dead ends: 101 [2023-11-06 21:18:28,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 78 SyntacticMatches, 14 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4352 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1571, Invalid=6439, Unknown=0, NotChecked=0, Total=8010 [2023-11-06 21:18:28,524 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:18:28,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 158 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:18:28,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-06 21:18:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2023-11-06 21:18:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:18:28,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2023-11-06 21:18:28,567 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 67 [2023-11-06 21:18:28,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:18:28,567 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2023-11-06 21:18:28,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:18:28,568 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2023-11-06 21:18:28,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-06 21:18:28,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:18:28,569 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:18:28,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-11-06 21:18:28,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-06 21:18:28,775 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:18:28,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:18:28,775 INFO L85 PathProgramCache]: Analyzing trace with hash 585348584, now seen corresponding path program 22 times [2023-11-06 21:18:28,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:18:28,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637877050] [2023-11-06 21:18:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:18:28,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:18:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:18:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 121 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:30,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:18:30,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637877050] [2023-11-06 21:18:30,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637877050] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:18:30,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061993673] [2023-11-06 21:18:30,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:18:30,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:18:30,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:18:30,035 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:18:30,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-06 21:18:30,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:18:30,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:18:30,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 21:18:30,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:18:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:31,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:18:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:32,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061993673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:18:32,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:18:32,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 74 [2023-11-06 21:18:32,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158075878] [2023-11-06 21:18:32,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:18:32,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-11-06 21:18:32,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:18:32,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-11-06 21:18:32,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=4376, Unknown=0, NotChecked=0, Total=5402 [2023-11-06 21:18:32,662 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 74 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 21:18:33,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:18:33,421 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2023-11-06 21:18:33,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 21:18:33,422 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 74 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) Word has length 67 [2023-11-06 21:18:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:18:33,424 INFO L225 Difference]: With dead ends: 111 [2023-11-06 21:18:33,424 INFO L226 Difference]: Without dead ends: 104 [2023-11-06 21:18:33,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 77 SyntacticMatches, 15 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4401 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1630, Invalid=6380, Unknown=0, NotChecked=0, Total=8010 [2023-11-06 21:18:33,425 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 153 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:18:33,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 76 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:18:33,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-06 21:18:33,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2023-11-06 21:18:33,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 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 21:18:33,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2023-11-06 21:18:33,471 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 67 [2023-11-06 21:18:33,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:18:33,471 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2023-11-06 21:18:33,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 74 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 21:18:33,472 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2023-11-06 21:18:33,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-06 21:18:33,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:18:33,472 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:18:33,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-11-06 21:18:33,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:18:33,673 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:18:33,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:18:33,673 INFO L85 PathProgramCache]: Analyzing trace with hash -156760954, now seen corresponding path program 23 times [2023-11-06 21:18:33,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:18:33,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163296019] [2023-11-06 21:18:33,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:18:33,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:18:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:18:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:34,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:18:34,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163296019] [2023-11-06 21:18:34,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163296019] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:18:34,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045771719] [2023-11-06 21:18:34,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:18:34,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:18:34,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:18:34,929 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:18:34,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-06 21:18:35,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-11-06 21:18:35,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:18:35,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 21:18:35,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:18:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:36,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:18:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:38,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045771719] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:18:38,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:18:38,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 81 [2023-11-06 21:18:38,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472108023] [2023-11-06 21:18:38,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:18:38,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-11-06 21:18:38,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:18:38,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-11-06 21:18:38,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1151, Invalid=5329, Unknown=0, NotChecked=0, Total=6480 [2023-11-06 21:18:38,109 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 21:18:39,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:18:39,266 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2023-11-06 21:18:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 21:18:39,268 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 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 69 [2023-11-06 21:18:39,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:18:39,269 INFO L225 Difference]: With dead ends: 148 [2023-11-06 21:18:39,269 INFO L226 Difference]: Without dead ends: 107 [2023-11-06 21:18:39,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 75 SyntacticMatches, 16 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5308 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1836, Invalid=8064, Unknown=0, NotChecked=0, Total=9900 [2023-11-06 21:18:39,271 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:18:39,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 150 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:18:39,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-06 21:18:39,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2023-11-06 21:18:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0480769230769231) internal successors, (109), 104 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 21:18:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2023-11-06 21:18:39,325 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 69 [2023-11-06 21:18:39,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:18:39,325 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2023-11-06 21:18:39,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 21:18:39,325 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2023-11-06 21:18:39,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-06 21:18:39,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:18:39,326 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:18:39,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-11-06 21:18:39,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-11-06 21:18:39,528 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:18:39,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:18:39,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1243378554, now seen corresponding path program 23 times [2023-11-06 21:18:39,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:18:39,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92858732] [2023-11-06 21:18:39,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:18:39,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:18:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:18:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 144 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:40,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:18:40,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92858732] [2023-11-06 21:18:40,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92858732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:18:40,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542768274] [2023-11-06 21:18:40,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:18:40,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:18:40,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:18:40,850 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:18:40,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-06 21:18:40,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-11-06 21:18:40,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:18:40,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 21:18:40,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:18:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:42,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:18:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:43,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542768274] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:18:43,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:18:43,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 80 [2023-11-06 21:18:43,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703123470] [2023-11-06 21:18:43,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:18:43,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-11-06 21:18:43,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:18:43,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-11-06 21:18:43,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=5165, Unknown=0, NotChecked=0, Total=6320 [2023-11-06 21:18:43,802 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 80 states, 80 states have (on average 2.0125) internal successors, (161), 80 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 21:18:44,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:18:44,714 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2023-11-06 21:18:44,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 21:18:44,714 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 80 states have internal predecessors, (161), 0 states have call successors, (0), 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 69 [2023-11-06 21:18:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:18:44,716 INFO L225 Difference]: With dead ends: 121 [2023-11-06 21:18:44,716 INFO L226 Difference]: Without dead ends: 114 [2023-11-06 21:18:44,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 76 SyntacticMatches, 16 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5260 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1909, Invalid=7991, Unknown=0, NotChecked=0, Total=9900 [2023-11-06 21:18:44,718 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:18:44,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 61 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:18:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-06 21:18:44,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2023-11-06 21:18:44,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0471698113207548) internal successors, (111), 106 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 21:18:44,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2023-11-06 21:18:44,797 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 69 [2023-11-06 21:18:44,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:18:44,797 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2023-11-06 21:18:44,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 80 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 21:18:44,798 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2023-11-06 21:18:44,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-06 21:18:44,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:18:44,799 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:18:44,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-11-06 21:18:45,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:18:45,005 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:18:45,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:18:45,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1788521436, now seen corresponding path program 24 times [2023-11-06 21:18:45,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:18:45,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147319570] [2023-11-06 21:18:45,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:18:45,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:18:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:18:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 171 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:46,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:18:46,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147319570] [2023-11-06 21:18:46,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147319570] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:18:46,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839961061] [2023-11-06 21:18:46,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:18:46,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:18:46,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:18:46,112 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:18:46,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-06 21:18:46,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-11-06 21:18:46,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:18:46,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 21:18:46,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:18:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:47,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:18:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:49,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839961061] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:18:49,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:18:49,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 79 [2023-11-06 21:18:49,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336396283] [2023-11-06 21:18:49,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:18:49,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-11-06 21:18:49,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:18:49,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-11-06 21:18:49,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=5009, Unknown=0, NotChecked=0, Total=6162 [2023-11-06 21:18:49,096 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 79 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 21:18:49,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:18:49,990 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2023-11-06 21:18:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 21:18:49,990 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 79 states have internal predecessors, (161), 0 states have call successors, (0), 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 21:18:49,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:18:49,991 INFO L225 Difference]: With dead ends: 148 [2023-11-06 21:18:49,991 INFO L226 Difference]: Without dead ends: 107 [2023-11-06 21:18:49,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 81 SyntacticMatches, 16 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5047 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1786, Invalid=7334, Unknown=0, NotChecked=0, Total=9120 [2023-11-06 21:18:49,992 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:18:49,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 118 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:18:49,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-06 21:18:50,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2023-11-06 21:18:50,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 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 21:18:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2023-11-06 21:18:50,052 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 71 [2023-11-06 21:18:50,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:18:50,053 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2023-11-06 21:18:50,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.037974683544304) internal successors, (161), 79 states have internal predecessors, (161), 0 states have call successors, (0), 0 states 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 21:18:50,053 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2023-11-06 21:18:50,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-06 21:18:50,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:18:50,054 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:18:50,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-11-06 21:18:50,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-11-06 21:18:50,261 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:18:50,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:18:50,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1702271868, now seen corresponding path program 24 times [2023-11-06 21:18:50,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:18:50,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187144530] [2023-11-06 21:18:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:18:50,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:18:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:18:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 144 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:51,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:18:51,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187144530] [2023-11-06 21:18:51,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187144530] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:18:51,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257400353] [2023-11-06 21:18:51,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:18:51,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:18:51,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:18:51,550 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:18:51,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-06 21:18:51,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-11-06 21:18:51,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:18:51,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 21:18:51,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:18:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:53,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:18:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:54,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257400353] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:18:54,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:18:54,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 79 [2023-11-06 21:18:54,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452674244] [2023-11-06 21:18:54,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:18:54,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-11-06 21:18:54,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:18:54,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-11-06 21:18:54,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=4996, Unknown=0, NotChecked=0, Total=6162 [2023-11-06 21:18:54,594 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 79 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:18:55,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:18:55,472 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2023-11-06 21:18:55,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 21:18:55,472 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 79 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-06 21:18:55,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:18:55,473 INFO L225 Difference]: With dead ends: 117 [2023-11-06 21:18:55,473 INFO L226 Difference]: Without dead ends: 110 [2023-11-06 21:18:55,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 81 SyntacticMatches, 16 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5054 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1850, Invalid=7270, Unknown=0, NotChecked=0, Total=9120 [2023-11-06 21:18:55,474 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 151 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:18:55,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 76 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:18:55,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-06 21:18:55,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2023-11-06 21:18:55,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 107 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 21:18:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2023-11-06 21:18:55,526 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 71 [2023-11-06 21:18:55,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:18:55,526 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2023-11-06 21:18:55,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 79 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:18:55,526 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2023-11-06 21:18:55,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-06 21:18:55,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:18:55,527 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:18:55,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-11-06 21:18:55,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:18:55,728 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:18:55,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:18:55,728 INFO L85 PathProgramCache]: Analyzing trace with hash 463240226, now seen corresponding path program 25 times [2023-11-06 21:18:55,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:18:55,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566402696] [2023-11-06 21:18:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:18:55,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:18:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:18:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:57,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:18:57,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566402696] [2023-11-06 21:18:57,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566402696] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:18:57,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458679560] [2023-11-06 21:18:57,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:18:57,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:18:57,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:18:57,011 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:18:57,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-06 21:18:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:18:57,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 21:18:57,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:18:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:18:58,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:19:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:00,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458679560] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:19:00,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:19:00,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 86 [2023-11-06 21:19:00,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343329763] [2023-11-06 21:19:00,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:19:00,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-11-06 21:19:00,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:19:00,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-11-06 21:19:00,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1298, Invalid=6012, Unknown=0, NotChecked=0, Total=7310 [2023-11-06 21:19:00,458 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 86 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 21:19:01,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:19:01,576 INFO L93 Difference]: Finished difference Result 156 states and 162 transitions. [2023-11-06 21:19:01,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 21:19:01,576 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 86 states have internal predecessors, (171), 0 states have call successors, (0), 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 73 [2023-11-06 21:19:01,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:19:01,577 INFO L225 Difference]: With dead ends: 156 [2023-11-06 21:19:01,577 INFO L226 Difference]: Without dead ends: 113 [2023-11-06 21:19:01,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 78 SyntacticMatches, 18 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6071 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2066, Invalid=9064, Unknown=0, NotChecked=0, Total=11130 [2023-11-06 21:19:01,579 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 74 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:19:01,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 116 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:19:01,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-06 21:19:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2023-11-06 21:19:01,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0454545454545454) internal successors, (115), 110 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:19:01,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2023-11-06 21:19:01,654 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 73 [2023-11-06 21:19:01,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:19:01,654 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2023-11-06 21:19:01,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 86 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 21:19:01,654 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2023-11-06 21:19:01,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-06 21:19:01,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:19:01,655 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:19:01,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-11-06 21:19:01,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-11-06 21:19:01,856 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:19:01,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:19:01,856 INFO L85 PathProgramCache]: Analyzing trace with hash -965825374, now seen corresponding path program 25 times [2023-11-06 21:19:01,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:19:01,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604068949] [2023-11-06 21:19:01,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:19:01,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:19:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:19:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 169 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:03,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:19:03,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604068949] [2023-11-06 21:19:03,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604068949] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:19:03,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581608457] [2023-11-06 21:19:03,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:19:03,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:19:03,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:19:03,299 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:19:03,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-06 21:19:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:19:03,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 21:19:03,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:19:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:04,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:19:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:06,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581608457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:19:06,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:19:06,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 85 [2023-11-06 21:19:06,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997486477] [2023-11-06 21:19:06,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:19:06,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-11-06 21:19:06,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:19:06,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-11-06 21:19:06,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1303, Invalid=5837, Unknown=0, NotChecked=0, Total=7140 [2023-11-06 21:19:06,531 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 85 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 21:19:07,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:19:07,734 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2023-11-06 21:19:07,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 21:19:07,734 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 85 states have internal predecessors, (171), 0 states have call successors, (0), 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 73 [2023-11-06 21:19:07,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:19:07,735 INFO L225 Difference]: With dead ends: 127 [2023-11-06 21:19:07,735 INFO L226 Difference]: Without dead ends: 120 [2023-11-06 21:19:07,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 80 SyntacticMatches, 17 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5972 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2145, Invalid=8985, Unknown=0, NotChecked=0, Total=11130 [2023-11-06 21:19:07,736 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:19:07,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 117 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:19:07,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-06 21:19:07,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2023-11-06 21:19:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0446428571428572) internal successors, (117), 112 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 21:19:07,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2023-11-06 21:19:07,800 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 73 [2023-11-06 21:19:07,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:19:07,800 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2023-11-06 21:19:07,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 85 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 21:19:07,800 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2023-11-06 21:19:07,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-06 21:19:07,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:19:07,801 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:19:07,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-11-06 21:19:08,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:19:08,002 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:19:08,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:19:08,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1347887808, now seen corresponding path program 26 times [2023-11-06 21:19:08,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:19:08,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205875934] [2023-11-06 21:19:08,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:19:08,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:19:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:19:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 198 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:09,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:19:09,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205875934] [2023-11-06 21:19:09,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205875934] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:19:09,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002552078] [2023-11-06 21:19:09,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:19:09,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:19:09,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:19:09,299 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:19:09,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-06 21:19:09,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:19:09,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:19:09,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 21:19:09,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:19:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:11,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:19:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:12,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002552078] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:19:12,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:19:12,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 84 [2023-11-06 21:19:12,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595747447] [2023-11-06 21:19:12,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:19:12,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-11-06 21:19:12,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:19:12,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-11-06 21:19:12,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1301, Invalid=5671, Unknown=0, NotChecked=0, Total=6972 [2023-11-06 21:19:12,640 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 84 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 21:19:13,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:19:13,588 INFO L93 Difference]: Finished difference Result 156 states and 160 transitions. [2023-11-06 21:19:13,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 21:19:13,589 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 84 states have internal predecessors, (171), 0 states have call successors, (0), 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 21:19:13,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:19:13,590 INFO L225 Difference]: With dead ends: 156 [2023-11-06 21:19:13,590 INFO L226 Difference]: Without dead ends: 113 [2023-11-06 21:19:13,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 86 SyntacticMatches, 16 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5697 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2015, Invalid=8287, Unknown=0, NotChecked=0, Total=10302 [2023-11-06 21:19:13,591 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 71 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:19:13,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 97 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:19:13,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-06 21:19:13,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2023-11-06 21:19:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 111 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:19:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2023-11-06 21:19:13,670 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 75 [2023-11-06 21:19:13,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:19:13,670 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2023-11-06 21:19:13,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0357142857142856) internal successors, (171), 84 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 21:19:13,670 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2023-11-06 21:19:13,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-06 21:19:13,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:19:13,671 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:19:13,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-11-06 21:19:13,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:19:13,872 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:19:13,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:19:13,872 INFO L85 PathProgramCache]: Analyzing trace with hash 800173344, now seen corresponding path program 26 times [2023-11-06 21:19:13,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:19:13,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140184200] [2023-11-06 21:19:13,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:19:13,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:19:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:19:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 169 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:15,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:19:15,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140184200] [2023-11-06 21:19:15,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140184200] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:19:15,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410254197] [2023-11-06 21:19:15,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:19:15,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:19:15,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:19:15,271 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:19:15,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-06 21:19:15,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:19:15,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:19:15,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 21:19:15,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:19:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:16,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:19:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:18,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410254197] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:19:18,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:19:18,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 84 [2023-11-06 21:19:18,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634643756] [2023-11-06 21:19:18,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:19:18,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-11-06 21:19:18,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:19:18,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-11-06 21:19:18,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1315, Invalid=5657, Unknown=0, NotChecked=0, Total=6972 [2023-11-06 21:19:18,521 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 84 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 21:19:19,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:19:19,570 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2023-11-06 21:19:19,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 21:19:19,571 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 84 states have internal predecessors, (173), 0 states have call successors, (0), 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 21:19:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:19:19,571 INFO L225 Difference]: With dead ends: 123 [2023-11-06 21:19:19,572 INFO L226 Difference]: Without dead ends: 116 [2023-11-06 21:19:19,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 85 SyntacticMatches, 17 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5752 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2084, Invalid=8218, Unknown=0, NotChecked=0, Total=10302 [2023-11-06 21:19:19,572 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 332 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:19:19,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 110 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:19:19,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-06 21:19:19,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2023-11-06 21:19:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0353982300884956) internal successors, (117), 113 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:19:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2023-11-06 21:19:19,634 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 75 [2023-11-06 21:19:19,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:19:19,634 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2023-11-06 21:19:19,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 84 states have internal predecessors, (173), 0 states have call successors, (0), 0 states 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 21:19:19,635 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2023-11-06 21:19:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-06 21:19:19,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:19:19,635 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:19:19,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-11-06 21:19:19,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-06 21:19:19,836 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:19:19,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:19:19,836 INFO L85 PathProgramCache]: Analyzing trace with hash 131403198, now seen corresponding path program 27 times [2023-11-06 21:19:19,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:19:19,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670171606] [2023-11-06 21:19:19,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:19:19,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:19:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:19:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:21,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:19:21,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670171606] [2023-11-06 21:19:21,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670171606] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:19:21,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596575668] [2023-11-06 21:19:21,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:19:21,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:19:21,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:19:21,344 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:19:21,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-06 21:19:21,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-11-06 21:19:21,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:19:21,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 21:19:21,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:19:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:23,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:19:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:25,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596575668] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:19:25,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:19:25,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 91 [2023-11-06 21:19:25,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529390732] [2023-11-06 21:19:25,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:19:25,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-11-06 21:19:25,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:19:25,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-11-06 21:19:25,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1454, Invalid=6736, Unknown=0, NotChecked=0, Total=8190 [2023-11-06 21:19:25,403 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 91 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 21:19:26,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:19:26,758 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2023-11-06 21:19:26,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-06 21:19:26,758 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 91 states have internal predecessors, (181), 0 states have call successors, (0), 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 77 [2023-11-06 21:19:26,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:19:26,759 INFO L225 Difference]: With dead ends: 164 [2023-11-06 21:19:26,759 INFO L226 Difference]: Without dead ends: 119 [2023-11-06 21:19:26,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 83 SyntacticMatches, 18 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2310, Invalid=10122, Unknown=0, NotChecked=0, Total=12432 [2023-11-06 21:19:26,761 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:19:26,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 118 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:19:26,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-06 21:19:26,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2023-11-06 21:19:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.043103448275862) internal successors, (121), 116 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 21:19:26,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2023-11-06 21:19:26,862 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 77 [2023-11-06 21:19:26,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:19:26,863 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2023-11-06 21:19:26,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 91 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 21:19:26,863 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2023-11-06 21:19:26,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-06 21:19:26,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:19:26,864 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:19:26,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-11-06 21:19:27,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-06 21:19:27,071 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:19:27,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:19:27,072 INFO L85 PathProgramCache]: Analyzing trace with hash 322291390, now seen corresponding path program 27 times [2023-11-06 21:19:27,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:19:27,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383472704] [2023-11-06 21:19:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:19:27,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:19:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:19:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 196 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:28,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:19:28,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383472704] [2023-11-06 21:19:28,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383472704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:19:28,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127383365] [2023-11-06 21:19:28,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:19:28,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:19:28,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:19:28,820 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:19:28,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-06 21:19:28,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-11-06 21:19:28,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:19:28,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 21:19:28,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:19:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:30,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:19:32,627 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:32,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127383365] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:19:32,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:19:32,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 90 [2023-11-06 21:19:32,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844371857] [2023-11-06 21:19:32,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:19:32,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-11-06 21:19:32,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:19:32,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-11-06 21:19:32,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1460, Invalid=6550, Unknown=0, NotChecked=0, Total=8010 [2023-11-06 21:19:32,629 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 90 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 21:19:34,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:19:34,098 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2023-11-06 21:19:34,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-06 21:19:34,099 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 90 states have internal predecessors, (181), 0 states have call successors, (0), 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 77 [2023-11-06 21:19:34,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:19:34,100 INFO L225 Difference]: With dead ends: 133 [2023-11-06 21:19:34,100 INFO L226 Difference]: Without dead ends: 126 [2023-11-06 21:19:34,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 84 SyntacticMatches, 18 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6729 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2395, Invalid=10037, Unknown=0, NotChecked=0, Total=12432 [2023-11-06 21:19:34,102 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 252 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:19:34,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 126 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:19:34,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-06 21:19:34,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2023-11-06 21:19:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 118 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 21:19:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2023-11-06 21:19:34,189 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 77 [2023-11-06 21:19:34,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:19:34,190 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2023-11-06 21:19:34,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 90 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 21:19:34,190 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2023-11-06 21:19:34,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-06 21:19:34,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:19:34,191 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:19:34,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-11-06 21:19:34,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:19:34,398 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:19:34,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:19:34,398 INFO L85 PathProgramCache]: Analyzing trace with hash -418258852, now seen corresponding path program 28 times [2023-11-06 21:19:34,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:19:34,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822103756] [2023-11-06 21:19:34,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:19:34,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:19:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:19:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 227 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:35,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:19:35,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822103756] [2023-11-06 21:19:35,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822103756] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:19:35,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759362910] [2023-11-06 21:19:35,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:19:35,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:19:35,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:19:35,794 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:19:35,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-06 21:19:35,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:19:35,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:19:35,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 21:19:35,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:19:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:37,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:19:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:39,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759362910] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:19:39,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:19:39,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 89 [2023-11-06 21:19:39,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659530488] [2023-11-06 21:19:39,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:19:39,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-11-06 21:19:39,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:19:39,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-11-06 21:19:39,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1458, Invalid=6374, Unknown=0, NotChecked=0, Total=7832 [2023-11-06 21:19:39,676 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 21:19:40,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:19:40,929 INFO L93 Difference]: Finished difference Result 164 states and 168 transitions. [2023-11-06 21:19:40,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 21:19:40,930 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 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 21:19:40,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:19:40,931 INFO L225 Difference]: With dead ends: 164 [2023-11-06 21:19:40,931 INFO L226 Difference]: Without dead ends: 119 [2023-11-06 21:19:40,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 89 SyntacticMatches, 18 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6488 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2258, Invalid=9298, Unknown=0, NotChecked=0, Total=11556 [2023-11-06 21:19:40,933 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:19:40,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 146 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:19:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-06 21:19:41,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2023-11-06 21:19:41,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 117 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 21:19:41,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2023-11-06 21:19:41,047 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 79 [2023-11-06 21:19:41,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:19:41,047 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2023-11-06 21:19:41,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 21:19:41,048 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2023-11-06 21:19:41,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-06 21:19:41,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:19:41,049 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:19:41,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-11-06 21:19:41,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:19:41,256 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:19:41,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:19:41,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1144156228, now seen corresponding path program 28 times [2023-11-06 21:19:41,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:19:41,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84782514] [2023-11-06 21:19:41,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:19:41,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:19:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:19:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 196 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:43,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:19:43,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84782514] [2023-11-06 21:19:43,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84782514] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:19:43,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736574470] [2023-11-06 21:19:43,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:19:43,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:19:43,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:19:43,046 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:19:43,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-06 21:19:43,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:19:43,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:19:43,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 21:19:43,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:19:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:45,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:19:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 256 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:19:47,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736574470] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:19:47,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:19:47,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 89 [2023-11-06 21:19:47,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12765650] [2023-11-06 21:19:47,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:19:47,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-11-06 21:19:47,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:19:47,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-11-06 21:19:47,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1473, Invalid=6359, Unknown=0, NotChecked=0, Total=7832 [2023-11-06 21:19:47,114 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 89 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 21:19:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:19:48,356 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2023-11-06 21:19:48,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 21:19:48,357 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 89 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 79 [2023-11-06 21:19:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:19:48,358 INFO L225 Difference]: With dead ends: 129 [2023-11-06 21:19:48,358 INFO L226 Difference]: Without dead ends: 122 [2023-11-06 21:19:48,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 89 SyntacticMatches, 18 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6495 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2332, Invalid=9224, Unknown=0, NotChecked=0, Total=11556 [2023-11-06 21:19:48,359 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 248 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:19:48,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 129 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:19:48,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-06 21:19:48,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2023-11-06 21:19:48,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 119 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 21:19:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2023-11-06 21:19:48,432 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 79 [2023-11-06 21:19:48,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:19:48,432 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2023-11-06 21:19:48,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 89 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 21:19:48,432 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2023-11-06 21:19:48,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-06 21:19:48,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:19:48,433 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:19:48,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1743d641-a6e1-44c9-88ab-c786ebcb8e02/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0