./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/fragtest_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/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_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/fragtest_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/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_2c825222-a9b3-4f02-89d9-98670acfc002/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 be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:10:48,336 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:10:48,403 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:10:48,410 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:10:48,411 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:10:48,437 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:10:48,438 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:10:48,439 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:10:48,440 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:10:48,440 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:10:48,441 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:10:48,442 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:10:48,443 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:10:48,444 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:10:48,444 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:10:48,445 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:10:48,446 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:10:48,446 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:10:48,447 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:10:48,448 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:10:48,448 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:10:48,449 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:10:48,450 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:10:48,450 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:10:48,451 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:10:48,451 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:10:48,452 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:10:48,453 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:10:48,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:10:48,454 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:10:48,454 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:10:48,455 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:10:48,456 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:10:48,456 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:10:48,457 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:10:48,457 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:10:48,458 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:10:48,458 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:10:48,459 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:10:48,459 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_2c825222-a9b3-4f02-89d9-98670acfc002/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e [2023-11-06 22:10:48,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:10:48,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:10:48,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:10:48,737 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:10:48,738 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:10:48,739 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/loop-invgen/fragtest_simple.i [2023-11-06 22:10:51,917 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:10:52,158 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:10:52,159 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/sv-benchmarks/c/loop-invgen/fragtest_simple.i [2023-11-06 22:10:52,167 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/data/4e689b1f2/ae7c6bfbfdab4e57b9270f3c309dd262/FLAGc82ada154 [2023-11-06 22:10:52,187 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/data/4e689b1f2/ae7c6bfbfdab4e57b9270f3c309dd262 [2023-11-06 22:10:52,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:10:52,200 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:10:52,205 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:10:52,205 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:10:52,212 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:10:52,216 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:10:52" (1/1) ... [2023-11-06 22:10:52,217 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e929418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:52, skipping insertion in model container [2023-11-06 22:10:52,218 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:10:52" (1/1) ... [2023-11-06 22:10:52,248 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:10:52,456 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_2c825222-a9b3-4f02-89d9-98670acfc002/sv-benchmarks/c/loop-invgen/fragtest_simple.i[893,906] [2023-11-06 22:10:52,471 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:10:52,484 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:10:52,501 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_2c825222-a9b3-4f02-89d9-98670acfc002/sv-benchmarks/c/loop-invgen/fragtest_simple.i[893,906] [2023-11-06 22:10:52,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:10:52,532 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:10:52,532 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:52 WrapperNode [2023-11-06 22:10:52,532 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:10:52,534 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:10:52,534 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:10:52,534 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:10:52,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:52" (1/1) ... [2023-11-06 22:10:52,551 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:52" (1/1) ... [2023-11-06 22:10:52,576 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2023-11-06 22:10:52,577 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:10:52,577 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:10:52,578 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:10:52,578 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:10:52,588 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:52" (1/1) ... [2023-11-06 22:10:52,589 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:52" (1/1) ... [2023-11-06 22:10:52,598 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:52" (1/1) ... [2023-11-06 22:10:52,598 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:52" (1/1) ... [2023-11-06 22:10:52,601 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:52" (1/1) ... [2023-11-06 22:10:52,610 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:52" (1/1) ... [2023-11-06 22:10:52,611 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:52" (1/1) ... [2023-11-06 22:10:52,612 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:52" (1/1) ... [2023-11-06 22:10:52,614 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:10:52,615 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:10:52,615 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:10:52,615 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:10:52,616 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:52" (1/1) ... [2023-11-06 22:10:52,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:10:52,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:52,662 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:10:52,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:10:52,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:10:52,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:10:52,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:10:52,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:10:52,789 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:10:52,791 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:10:53,024 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:10:53,030 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:10:53,030 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:10:53,033 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:10:53 BoogieIcfgContainer [2023-11-06 22:10:53,033 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:10:53,036 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:10:53,036 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:10:53,040 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:10:53,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:10:52" (1/3) ... [2023-11-06 22:10:53,041 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2585c31c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:10:53, skipping insertion in model container [2023-11-06 22:10:53,041 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:52" (2/3) ... [2023-11-06 22:10:53,042 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2585c31c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:10:53, skipping insertion in model container [2023-11-06 22:10:53,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:10:53" (3/3) ... [2023-11-06 22:10:53,043 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2023-11-06 22:10:53,064 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:10:53,065 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:10:53,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:10:53,139 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;@55205db7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:10:53,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:10:53,145 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:53,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 22:10:53,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:53,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:53,154 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:53,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:53,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1265170590, now seen corresponding path program 1 times [2023-11-06 22:10:53,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:53,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245446290] [2023-11-06 22:10:53,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:53,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:53,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:53,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245446290] [2023-11-06 22:10:53,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245446290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:53,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:53,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:10:53,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502030622] [2023-11-06 22:10:53,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:53,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:10:53,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:53,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:10:53,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:10:53,456 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:53,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:53,472 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2023-11-06 22:10:53,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:10:53,475 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 22:10:53,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:53,493 INFO L225 Difference]: With dead ends: 34 [2023-11-06 22:10:53,493 INFO L226 Difference]: Without dead ends: 15 [2023-11-06 22:10:53,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:10:53,500 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:53,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:10:53,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-06 22:10:53,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-06 22:10:53,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:53,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-06 22:10:53,531 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2023-11-06 22:10:53,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:53,532 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-06 22:10:53,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:53,532 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-06 22:10:53,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 22:10:53,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:53,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:53,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:10:53,533 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:53,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:53,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1704738984, now seen corresponding path program 1 times [2023-11-06 22:10:53,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:53,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745326977] [2023-11-06 22:10:53,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:53,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:53,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:53,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745326977] [2023-11-06 22:10:53,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745326977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:53,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:53,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:10:53,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241280483] [2023-11-06 22:10:53,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:53,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:10:53,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:53,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:10:53,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:10:53,763 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:53,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:53,803 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2023-11-06 22:10:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:10:53,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-06 22:10:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:53,805 INFO L225 Difference]: With dead ends: 20 [2023-11-06 22:10:53,805 INFO L226 Difference]: Without dead ends: 18 [2023-11-06 22:10:53,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:10:53,807 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:53,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 32 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:10:53,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-06 22:10:53,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2023-11-06 22:10:53,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-11-06 22:10:53,815 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2023-11-06 22:10:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:53,815 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-11-06 22:10:53,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:53,816 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-11-06 22:10:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 22:10:53,816 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:53,816 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:53,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:10:53,817 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:53,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:53,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1111328011, now seen corresponding path program 1 times [2023-11-06 22:10:53,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:53,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098943063] [2023-11-06 22:10:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:53,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:54,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:54,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098943063] [2023-11-06 22:10:54,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098943063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:54,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:54,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:10:54,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467896081] [2023-11-06 22:10:54,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:54,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:10:54,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:54,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:10:54,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:10:54,058 INFO L87 Difference]: Start difference. First operand 17 states and 20 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 22:10:54,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:54,166 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-11-06 22:10:54,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:10:54,168 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 22:10:54,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:54,169 INFO L225 Difference]: With dead ends: 34 [2023-11-06 22:10:54,169 INFO L226 Difference]: Without dead ends: 23 [2023-11-06 22:10:54,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:10:54,171 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:54,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:10:54,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-06 22:10:54,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2023-11-06 22:10:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:54,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-06 22:10:54,189 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2023-11-06 22:10:54,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:54,191 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-06 22:10:54,191 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 22:10:54,192 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-06 22:10:54,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 22:10:54,193 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:54,194 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:54,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:10:54,194 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:54,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:54,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1396960176, now seen corresponding path program 1 times [2023-11-06 22:10:54,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:54,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036283436] [2023-11-06 22:10:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:54,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:54,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:54,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036283436] [2023-11-06 22:10:54,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036283436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:54,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805756444] [2023-11-06 22:10:54,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:54,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:54,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:54,421 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:54,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:10:54,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:54,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:10:54,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:54,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:54,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805756444] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:54,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:54,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:10:54,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136880233] [2023-11-06 22:10:54,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:54,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:10:54,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:54,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:10:54,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:10:54,691 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 22:10:54,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:54,889 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2023-11-06 22:10:54,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:10:54,890 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 18 [2023-11-06 22:10:54,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:54,891 INFO L225 Difference]: With dead ends: 45 [2023-11-06 22:10:54,891 INFO L226 Difference]: Without dead ends: 34 [2023-11-06 22:10:54,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:10:54,894 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:54,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 53 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:10:54,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-06 22:10:54,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2023-11-06 22:10:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:54,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-11-06 22:10:54,937 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2023-11-06 22:10:54,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:54,938 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-11-06 22:10:54,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 22:10:54,938 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-11-06 22:10:54,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 22:10:54,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:54,940 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:54,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:55,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:55,146 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:55,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:55,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2071602104, now seen corresponding path program 2 times [2023-11-06 22:10:55,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:55,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140169498] [2023-11-06 22:10:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:55,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:55,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:55,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140169498] [2023-11-06 22:10:55,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140169498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:55,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844515492] [2023-11-06 22:10:55,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:10:55,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:55,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:55,339 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:55,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:10:55,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:10:55,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:10:55,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:10:55,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:55,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:55,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844515492] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:55,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:55,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2023-11-06 22:10:55,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448996604] [2023-11-06 22:10:55,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:55,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:10:55,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:55,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:10:55,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:10:55,719 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 22:10:56,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:56,008 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2023-11-06 22:10:56,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:10:56,009 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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) Word has length 24 [2023-11-06 22:10:56,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:56,011 INFO L225 Difference]: With dead ends: 59 [2023-11-06 22:10:56,011 INFO L226 Difference]: Without dead ends: 44 [2023-11-06 22:10:56,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:10:56,013 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 52 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:56,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 59 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:10:56,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-06 22:10:56,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2023-11-06 22:10:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:56,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-11-06 22:10:56,022 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 24 [2023-11-06 22:10:56,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:56,022 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-11-06 22:10:56,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 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 22:10:56,023 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-11-06 22:10:56,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 22:10:56,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:56,024 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:56,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:56,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:56,230 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:56,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:56,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1976024800, now seen corresponding path program 3 times [2023-11-06 22:10:56,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:56,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517536018] [2023-11-06 22:10:56,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:56,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:56,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:56,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517536018] [2023-11-06 22:10:56,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517536018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:56,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978358208] [2023-11-06 22:10:56,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:10:56,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:56,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:56,432 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:56,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:10:56,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:10:56,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:10:56,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:10:56,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:56,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:56,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978358208] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:56,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:56,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2023-11-06 22:10:56,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957846257] [2023-11-06 22:10:56,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:56,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:10:56,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:56,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:10:56,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:10:56,765 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:56,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:56,912 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2023-11-06 22:10:56,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:10:56,912 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-06 22:10:56,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:56,913 INFO L225 Difference]: With dead ends: 68 [2023-11-06 22:10:56,913 INFO L226 Difference]: Without dead ends: 49 [2023-11-06 22:10:56,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:10:56,915 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:56,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 73 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:10:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-06 22:10:56,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2023-11-06 22:10:56,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2023-11-06 22:10:56,923 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 30 [2023-11-06 22:10:56,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:56,924 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2023-11-06 22:10:56,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:56,924 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2023-11-06 22:10:56,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:10:56,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:56,925 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:56,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:57,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:57,131 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:57,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:57,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1350589691, now seen corresponding path program 4 times [2023-11-06 22:10:57,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:57,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184392142] [2023-11-06 22:10:57,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:57,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:57,351 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:57,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:57,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184392142] [2023-11-06 22:10:57,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184392142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:57,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989136857] [2023-11-06 22:10:57,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:10:57,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:57,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:57,354 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:57,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:10:57,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:10:57,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:10:57,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:10:57,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:57,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:57,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989136857] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:57,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:57,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2023-11-06 22:10:57,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748699479] [2023-11-06 22:10:57,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:57,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:10:57,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:57,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:10:57,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:10:57,581 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 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 22:10:57,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:57,685 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2023-11-06 22:10:57,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:10:57,686 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 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) Word has length 32 [2023-11-06 22:10:57,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:57,687 INFO L225 Difference]: With dead ends: 50 [2023-11-06 22:10:57,687 INFO L226 Difference]: Without dead ends: 48 [2023-11-06 22:10:57,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:10:57,689 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:57,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 72 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:10:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-06 22:10:57,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2023-11-06 22:10:57,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:57,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2023-11-06 22:10:57,698 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 32 [2023-11-06 22:10:57,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:57,699 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2023-11-06 22:10:57,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 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 22:10:57,699 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2023-11-06 22:10:57,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-06 22:10:57,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:57,701 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:57,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:57,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:57,907 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:57,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:57,908 INFO L85 PathProgramCache]: Analyzing trace with hash -498130965, now seen corresponding path program 5 times [2023-11-06 22:10:57,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:57,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839090893] [2023-11-06 22:10:57,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:57,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 38 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:58,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:58,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839090893] [2023-11-06 22:10:58,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839090893] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:58,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236566315] [2023-11-06 22:10:58,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:10:58,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:58,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:58,219 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:58,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:10:58,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-06 22:10:58,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:10:58,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:10:58,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 50 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:58,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 50 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:58,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236566315] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:58,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:58,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2023-11-06 22:10:58,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741944491] [2023-11-06 22:10:58,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:58,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:10:58,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:58,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:10:58,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:10:58,726 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:58,985 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2023-11-06 22:10:58,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:10:58,986 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-06 22:10:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:58,987 INFO L225 Difference]: With dead ends: 115 [2023-11-06 22:10:58,987 INFO L226 Difference]: Without dead ends: 69 [2023-11-06 22:10:58,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:10:58,989 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 74 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:58,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 101 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:10:58,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-06 22:10:58,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 45. [2023-11-06 22:10:58,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:58,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2023-11-06 22:10:58,999 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 40 [2023-11-06 22:10:59,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:59,000 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2023-11-06 22:10:59,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:59,000 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2023-11-06 22:10:59,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-06 22:10:59,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:59,002 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:59,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:59,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:10:59,209 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:59,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:59,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1499997707, now seen corresponding path program 6 times [2023-11-06 22:10:59,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:59,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511212478] [2023-11-06 22:10:59,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:59,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 30 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:59,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:59,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511212478] [2023-11-06 22:10:59,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511212478] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:59,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342583959] [2023-11-06 22:10:59,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:10:59,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:59,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:59,438 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:59,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:10:59,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-06 22:10:59,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:10:59,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:10:59,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:59,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:10:59,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342583959] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:10:59,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:10:59,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2023-11-06 22:10:59,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107794410] [2023-11-06 22:10:59,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:10:59,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:10:59,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:59,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:10:59,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:10:59,778 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 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 22:10:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:59,911 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2023-11-06 22:10:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:10:59,911 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 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) Word has length 44 [2023-11-06 22:10:59,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:59,915 INFO L225 Difference]: With dead ends: 62 [2023-11-06 22:10:59,915 INFO L226 Difference]: Without dead ends: 60 [2023-11-06 22:10:59,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:10:59,918 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 91 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 22:10:59,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 91 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:10:59,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-06 22:10:59,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2023-11-06 22:10:59,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:10:59,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2023-11-06 22:10:59,944 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 44 [2023-11-06 22:10:59,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:59,946 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2023-11-06 22:10:59,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 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 22:10:59,946 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2023-11-06 22:10:59,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-06 22:10:59,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:59,952 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:59,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:00,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:11:00,159 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:00,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:00,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1325832485, now seen corresponding path program 7 times [2023-11-06 22:11:00,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:00,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819506852] [2023-11-06 22:11:00,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:00,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 80 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:00,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:00,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819506852] [2023-11-06 22:11:00,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819506852] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:00,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664116268] [2023-11-06 22:11:00,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:11:00,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:00,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:00,497 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:00,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:11:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:00,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:11:00,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 96 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:11:00,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 96 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:11:01,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664116268] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:01,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:01,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 26 [2023-11-06 22:11:01,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383726713] [2023-11-06 22:11:01,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:01,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:11:01,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:01,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:11:01,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:11:01,056 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:01,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:01,312 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2023-11-06 22:11:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:11:01,312 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-06 22:11:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:01,313 INFO L225 Difference]: With dead ends: 116 [2023-11-06 22:11:01,313 INFO L226 Difference]: Without dead ends: 83 [2023-11-06 22:11:01,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 83 SyntacticMatches, 12 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:11:01,314 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 85 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:01,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 149 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:11:01,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-06 22:11:01,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 55. [2023-11-06 22:11:01,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2023-11-06 22:11:01,324 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 52 [2023-11-06 22:11:01,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:01,325 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2023-11-06 22:11:01,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:01,325 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2023-11-06 22:11:01,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 22:11:01,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:01,326 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:01,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:01,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:11:01,532 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:01,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:01,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1066393856, now seen corresponding path program 8 times [2023-11-06 22:11:01,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:01,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525045141] [2023-11-06 22:11:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:01,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 80 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:01,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:01,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525045141] [2023-11-06 22:11:01,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525045141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:01,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438784779] [2023-11-06 22:11:01,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:11:01,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:01,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:01,917 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:01,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:11:01,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:11:01,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:01,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:11:01,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 98 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:02,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 98 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:02,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438784779] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:02,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:02,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2023-11-06 22:11:02,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743667843] [2023-11-06 22:11:02,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:02,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:11:02,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:02,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:11:02,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:11:02,535 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:02,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:02,807 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2023-11-06 22:11:02,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:11:02,807 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-06 22:11:02,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:02,808 INFO L225 Difference]: With dead ends: 124 [2023-11-06 22:11:02,808 INFO L226 Difference]: Without dead ends: 89 [2023-11-06 22:11:02,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 84 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=329, Invalid=931, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 22:11:02,810 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 77 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:02,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 177 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:11:02,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-06 22:11:02,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2023-11-06 22:11:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2023-11-06 22:11:02,819 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 54 [2023-11-06 22:11:02,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:02,819 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2023-11-06 22:11:02,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:02,820 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2023-11-06 22:11:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-06 22:11:02,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:02,821 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:02,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:03,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:11:03,033 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:03,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:03,034 INFO L85 PathProgramCache]: Analyzing trace with hash -853974555, now seen corresponding path program 9 times [2023-11-06 22:11:03,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:03,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331132750] [2023-11-06 22:11:03,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:03,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 56 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:03,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:03,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331132750] [2023-11-06 22:11:03,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331132750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:03,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136802409] [2023-11-06 22:11:03,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:11:03,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:03,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:03,349 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:03,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:11:03,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-06 22:11:03,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:03,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:11:03,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 72 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:03,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 72 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:03,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136802409] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:03,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:03,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 15 [2023-11-06 22:11:03,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294900543] [2023-11-06 22:11:03,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:03,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:11:03,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:03,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:11:03,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:11:03,764 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 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 22:11:03,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:03,954 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2023-11-06 22:11:03,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:11:03,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 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) Word has length 56 [2023-11-06 22:11:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:03,956 INFO L225 Difference]: With dead ends: 74 [2023-11-06 22:11:03,956 INFO L226 Difference]: Without dead ends: 72 [2023-11-06 22:11:03,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 101 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:11:03,957 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:03,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 138 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:11:03,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-06 22:11:03,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2023-11-06 22:11:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:03,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2023-11-06 22:11:03,967 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 56 [2023-11-06 22:11:03,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:03,968 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2023-11-06 22:11:03,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 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 22:11:03,968 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2023-11-06 22:11:03,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-06 22:11:03,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:03,969 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:03,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:04,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:11:04,181 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:04,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:04,182 INFO L85 PathProgramCache]: Analyzing trace with hash -584319285, now seen corresponding path program 10 times [2023-11-06 22:11:04,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:04,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787351478] [2023-11-06 22:11:04,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:04,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 138 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:04,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:04,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787351478] [2023-11-06 22:11:04,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787351478] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:04,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401913743] [2023-11-06 22:11:04,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:11:04,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:04,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:04,674 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:04,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:11:04,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:11:04,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:04,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:11:04,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:05,194 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 162 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:05,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 162 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:05,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401913743] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:05,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:05,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 35 [2023-11-06 22:11:05,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183173581] [2023-11-06 22:11:05,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:05,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 22:11:05,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:05,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 22:11:05,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:11:05,519 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:06,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:06,016 INFO L93 Difference]: Finished difference Result 187 states and 212 transitions. [2023-11-06 22:11:06,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:11:06,016 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 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) Word has length 64 [2023-11-06 22:11:06,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:06,017 INFO L225 Difference]: With dead ends: 187 [2023-11-06 22:11:06,017 INFO L226 Difference]: Without dead ends: 109 [2023-11-06 22:11:06,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 99 SyntacticMatches, 15 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=719, Invalid=2143, Unknown=0, NotChecked=0, Total=2862 [2023-11-06 22:11:06,020 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 147 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:06,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 215 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:11:06,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-06 22:11:06,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 69. [2023-11-06 22:11:06,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2023-11-06 22:11:06,030 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 64 [2023-11-06 22:11:06,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:06,030 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2023-11-06 22:11:06,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2023-11-06 22:11:06,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-06 22:11:06,031 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:06,031 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:06,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:06,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:06,238 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:06,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:06,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1958102315, now seen corresponding path program 11 times [2023-11-06 22:11:06,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:06,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462337662] [2023-11-06 22:11:06,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:06,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 90 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:06,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:06,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462337662] [2023-11-06 22:11:06,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462337662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:06,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61773061] [2023-11-06 22:11:06,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:11:06,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:06,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:06,656 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:06,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:11:06,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-06 22:11:06,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:06,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:11:06,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 110 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:06,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 110 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:07,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61773061] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:07,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:07,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 17 [2023-11-06 22:11:07,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277084880] [2023-11-06 22:11:07,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:07,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:11:07,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:07,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:11:07,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:11:07,129 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 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 22:11:07,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:07,340 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2023-11-06 22:11:07,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:11:07,341 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 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 68 [2023-11-06 22:11:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:07,342 INFO L225 Difference]: With dead ends: 86 [2023-11-06 22:11:07,342 INFO L226 Difference]: Without dead ends: 84 [2023-11-06 22:11:07,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 123 SyntacticMatches, 19 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=291, Invalid=521, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:11:07,343 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:07,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 134 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:11:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-06 22:11:07,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2023-11-06 22:11:07,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:07,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2023-11-06 22:11:07,353 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 68 [2023-11-06 22:11:07,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:07,354 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2023-11-06 22:11:07,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 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 22:11:07,354 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2023-11-06 22:11:07,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-06 22:11:07,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:07,355 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:07,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:07,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:11:07,562 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:07,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:07,563 INFO L85 PathProgramCache]: Analyzing trace with hash -240359493, now seen corresponding path program 12 times [2023-11-06 22:11:07,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:07,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870081257] [2023-11-06 22:11:07,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:07,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:08,097 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 212 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:08,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:08,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870081257] [2023-11-06 22:11:08,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870081257] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:08,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901779722] [2023-11-06 22:11:08,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:11:08,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:08,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:08,099 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:08,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:11:08,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-11-06 22:11:08,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:08,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:11:08,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 242 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:08,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 242 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:09,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901779722] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:09,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:09,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 41 [2023-11-06 22:11:09,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638083706] [2023-11-06 22:11:09,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:09,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 22:11:09,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:09,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 22:11:09,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1246, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:11:09,121 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:09,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:09,822 INFO L93 Difference]: Finished difference Result 223 states and 252 transitions. [2023-11-06 22:11:09,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:11:09,823 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-11-06 22:11:09,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:09,824 INFO L225 Difference]: With dead ends: 223 [2023-11-06 22:11:09,824 INFO L226 Difference]: Without dead ends: 129 [2023-11-06 22:11:09,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 117 SyntacticMatches, 19 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1005, Invalid=3027, Unknown=0, NotChecked=0, Total=4032 [2023-11-06 22:11:09,827 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 218 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:09,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 299 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:11:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-06 22:11:09,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2023-11-06 22:11:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:09,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2023-11-06 22:11:09,838 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 76 [2023-11-06 22:11:09,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:09,838 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2023-11-06 22:11:09,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:09,839 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2023-11-06 22:11:09,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-06 22:11:09,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:09,840 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:09,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:10,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:11:10,046 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:10,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:10,047 INFO L85 PathProgramCache]: Analyzing trace with hash -433167163, now seen corresponding path program 13 times [2023-11-06 22:11:10,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:10,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557318795] [2023-11-06 22:11:10,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:10,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 132 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:10,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:10,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557318795] [2023-11-06 22:11:10,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557318795] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:10,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111542301] [2023-11-06 22:11:10,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:11:10,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:10,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:10,494 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:10,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:11:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:10,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:11:10,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 156 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:10,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 156 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:11,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111542301] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:11,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:11,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 19 [2023-11-06 22:11:11,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73372570] [2023-11-06 22:11:11,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:11,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:11:11,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:11,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:11:11,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:11:11,024 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 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 22:11:11,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:11,299 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2023-11-06 22:11:11,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:11:11,300 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 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 80 [2023-11-06 22:11:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:11,301 INFO L225 Difference]: With dead ends: 98 [2023-11-06 22:11:11,301 INFO L226 Difference]: Without dead ends: 96 [2023-11-06 22:11:11,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 145 SyntacticMatches, 23 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=676, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:11:11,302 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:11,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 140 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:11:11,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-06 22:11:11,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2023-11-06 22:11:11,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:11,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2023-11-06 22:11:11,315 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 80 [2023-11-06 22:11:11,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:11,316 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2023-11-06 22:11:11,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 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 22:11:11,316 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2023-11-06 22:11:11,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-06 22:11:11,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:11,317 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:11,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:11,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:11:11,524 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:11,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:11,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1442849195, now seen corresponding path program 14 times [2023-11-06 22:11:11,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:11,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448817961] [2023-11-06 22:11:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:11,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 302 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:12,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:12,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448817961] [2023-11-06 22:11:12,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448817961] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:12,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879637947] [2023-11-06 22:11:12,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:11:12,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:12,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:12,250 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:12,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:11:12,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:11:12,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:12,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:11:12,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 336 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:11:13,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 336 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:11:13,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879637947] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:13,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:13,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 44 [2023-11-06 22:11:13,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166345217] [2023-11-06 22:11:13,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:13,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 22:11:13,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:13,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 22:11:13,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1454, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 22:11:13,516 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 44 states, 44 states have (on average 3.3636363636363638) internal successors, (148), 44 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:14,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:14,049 INFO L93 Difference]: Finished difference Result 200 states and 230 transitions. [2023-11-06 22:11:14,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:11:14,049 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.3636363636363638) internal successors, (148), 44 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2023-11-06 22:11:14,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:14,051 INFO L225 Difference]: With dead ends: 200 [2023-11-06 22:11:14,051 INFO L226 Difference]: Without dead ends: 143 [2023-11-06 22:11:14,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 137 SyntacticMatches, 24 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=804, Invalid=2388, Unknown=0, NotChecked=0, Total=3192 [2023-11-06 22:11:14,054 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 131 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:14,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 317 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:11:14,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-06 22:11:14,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 91. [2023-11-06 22:11:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:14,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2023-11-06 22:11:14,067 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 88 [2023-11-06 22:11:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:14,068 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2023-11-06 22:11:14,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.3636363636363638) internal successors, (148), 44 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:14,068 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2023-11-06 22:11:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-06 22:11:14,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:14,069 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:14,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:14,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:11:14,276 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:14,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:14,277 INFO L85 PathProgramCache]: Analyzing trace with hash -641963184, now seen corresponding path program 15 times [2023-11-06 22:11:14,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:14,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233015876] [2023-11-06 22:11:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:14,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 302 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:15,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:15,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233015876] [2023-11-06 22:11:15,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233015876] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:15,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972440844] [2023-11-06 22:11:15,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:11:15,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:15,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:15,023 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:15,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:11:15,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-11-06 22:11:15,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:15,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:11:15,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:15,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:16,450 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:16,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972440844] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:16,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:16,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2023-11-06 22:11:16,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025635931] [2023-11-06 22:11:16,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:16,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-06 22:11:16,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:16,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-06 22:11:16,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1587, Unknown=0, NotChecked=0, Total=2070 [2023-11-06 22:11:16,455 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:17,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:17,054 INFO L93 Difference]: Finished difference Result 208 states and 240 transitions. [2023-11-06 22:11:17,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 22:11:17,055 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-11-06 22:11:17,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:17,056 INFO L225 Difference]: With dead ends: 208 [2023-11-06 22:11:17,056 INFO L226 Difference]: Without dead ends: 149 [2023-11-06 22:11:17,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 138 SyntacticMatches, 26 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2023-11-06 22:11:17,059 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 198 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:17,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 327 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:11:17,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-06 22:11:17,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 93. [2023-11-06 22:11:17,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:17,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2023-11-06 22:11:17,074 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 90 [2023-11-06 22:11:17,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:17,074 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2023-11-06 22:11:17,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.260869565217391) internal successors, (150), 46 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:17,075 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2023-11-06 22:11:17,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-06 22:11:17,079 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:17,079 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:17,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:17,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:11:17,286 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:17,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:17,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1603067829, now seen corresponding path program 16 times [2023-11-06 22:11:17,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:17,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585018696] [2023-11-06 22:11:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:17,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 182 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:17,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:17,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585018696] [2023-11-06 22:11:17,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585018696] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:17,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078112333] [2023-11-06 22:11:17,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:11:17,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:17,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:17,815 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:17,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:11:17,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:11:17,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:17,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:11:17,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:18,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:18,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078112333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:18,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:18,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 21 [2023-11-06 22:11:18,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385762380] [2023-11-06 22:11:18,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:18,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:11:18,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:18,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:11:18,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:11:18,452 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 22:11:18,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:18,747 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2023-11-06 22:11:18,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 22:11:18,748 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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) Word has length 92 [2023-11-06 22:11:18,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:18,749 INFO L225 Difference]: With dead ends: 110 [2023-11-06 22:11:18,749 INFO L226 Difference]: Without dead ends: 108 [2023-11-06 22:11:18,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 167 SyntacticMatches, 27 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=481, Invalid=851, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:11:18,750 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 26 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:18,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 174 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:11:18,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-06 22:11:18,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2023-11-06 22:11:18,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2023-11-06 22:11:18,762 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 92 [2023-11-06 22:11:18,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:18,763 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2023-11-06 22:11:18,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 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 22:11:18,763 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2023-11-06 22:11:18,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-06 22:11:18,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:18,764 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:18,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:18,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:18,975 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:18,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:18,976 INFO L85 PathProgramCache]: Analyzing trace with hash 778874011, now seen corresponding path program 17 times [2023-11-06 22:11:18,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:18,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632508708] [2023-11-06 22:11:18,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:18,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 408 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:19,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:19,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632508708] [2023-11-06 22:11:19,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632508708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:19,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005493063] [2023-11-06 22:11:19,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:11:19,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:19,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:19,868 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:19,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:11:20,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-11-06 22:11:20,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:20,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:11:20,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 450 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:20,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 450 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:21,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005493063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:21,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:21,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2023-11-06 22:11:21,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334116737] [2023-11-06 22:11:21,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:21,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-06 22:11:21,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:21,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-06 22:11:21,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=2106, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 22:11:21,339 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:22,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:22,250 INFO L93 Difference]: Finished difference Result 295 states and 332 transitions. [2023-11-06 22:11:22,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-06 22:11:22,250 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2023-11-06 22:11:22,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:22,252 INFO L225 Difference]: With dead ends: 295 [2023-11-06 22:11:22,252 INFO L226 Difference]: Without dead ends: 169 [2023-11-06 22:11:22,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 153 SyntacticMatches, 27 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2260 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1721, Invalid=5251, Unknown=0, NotChecked=0, Total=6972 [2023-11-06 22:11:22,255 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 271 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:22,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 376 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:11:22,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-06 22:11:22,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 105. [2023-11-06 22:11:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2023-11-06 22:11:22,269 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 100 [2023-11-06 22:11:22,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:22,269 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2023-11-06 22:11:22,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.339622641509434) internal successors, (177), 53 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2023-11-06 22:11:22,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-06 22:11:22,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:22,271 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:22,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:22,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:22,478 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:22,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:22,479 INFO L85 PathProgramCache]: Analyzing trace with hash -706040923, now seen corresponding path program 18 times [2023-11-06 22:11:22,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:22,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770334004] [2023-11-06 22:11:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:22,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 240 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:23,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:23,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770334004] [2023-11-06 22:11:23,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770334004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:23,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589697952] [2023-11-06 22:11:23,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:11:23,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:23,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:23,079 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:23,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:11:23,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-11-06 22:11:23,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:23,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 22:11:23,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:23,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:23,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589697952] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:23,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:23,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 23 [2023-11-06 22:11:23,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409636537] [2023-11-06 22:11:23,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:23,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:11:23,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:23,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:11:23,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:11:23,791 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:24,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:24,079 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2023-11-06 22:11:24,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 22:11:24,079 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2023-11-06 22:11:24,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:24,080 INFO L225 Difference]: With dead ends: 122 [2023-11-06 22:11:24,081 INFO L226 Difference]: Without dead ends: 120 [2023-11-06 22:11:24,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 189 SyntacticMatches, 31 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=594, Invalid=1046, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:11:24,082 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 47 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:24,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 163 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:11:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-06 22:11:24,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2023-11-06 22:11:24,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 112 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:24,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2023-11-06 22:11:24,099 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 104 [2023-11-06 22:11:24,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:24,099 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2023-11-06 22:11:24,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2023-11-06 22:11:24,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-06 22:11:24,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:24,101 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:24,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:24,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:24,308 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:24,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:24,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1006078091, now seen corresponding path program 19 times [2023-11-06 22:11:24,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:24,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160996763] [2023-11-06 22:11:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:24,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 530 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:25,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:25,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160996763] [2023-11-06 22:11:25,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160996763] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:25,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991157088] [2023-11-06 22:11:25,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:11:25,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:25,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:25,347 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:25,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:11:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:25,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:11:25,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 576 proven. 272 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:11:26,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 576 proven. 272 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:11:26,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991157088] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:26,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:26,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 56 [2023-11-06 22:11:26,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894529790] [2023-11-06 22:11:26,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:26,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-06 22:11:26,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:26,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-06 22:11:26,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=706, Invalid=2374, Unknown=0, NotChecked=0, Total=3080 [2023-11-06 22:11:26,912 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:27,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:27,544 INFO L93 Difference]: Finished difference Result 256 states and 294 transitions. [2023-11-06 22:11:27,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 22:11:27,544 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2023-11-06 22:11:27,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:27,546 INFO L225 Difference]: With dead ends: 256 [2023-11-06 22:11:27,546 INFO L226 Difference]: Without dead ends: 183 [2023-11-06 22:11:27,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 173 SyntacticMatches, 32 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1947 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1320, Invalid=3936, Unknown=0, NotChecked=0, Total=5256 [2023-11-06 22:11:27,549 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 223 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:27,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 354 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:11:27,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-06 22:11:27,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 115. [2023-11-06 22:11:27,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 114 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2023-11-06 22:11:27,566 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 112 [2023-11-06 22:11:27,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:27,566 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2023-11-06 22:11:27,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2023-11-06 22:11:27,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-06 22:11:27,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:27,568 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:27,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-06 22:11:27,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:27,774 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:27,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:27,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1154118448, now seen corresponding path program 20 times [2023-11-06 22:11:27,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:27,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872067657] [2023-11-06 22:11:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:27,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 530 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:28,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:28,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872067657] [2023-11-06 22:11:28,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872067657] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:28,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636733376] [2023-11-06 22:11:28,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:11:28,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:28,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:28,801 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:28,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:11:28,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:11:28,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:28,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 22:11:28,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:29,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:30,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636733376] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:30,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:30,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2023-11-06 22:11:30,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803147763] [2023-11-06 22:11:30,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:30,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-06 22:11:30,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:30,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-06 22:11:30,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=2543, Unknown=0, NotChecked=0, Total=3306 [2023-11-06 22:11:30,610 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:31,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:31,243 INFO L93 Difference]: Finished difference Result 264 states and 304 transitions. [2023-11-06 22:11:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 22:11:31,243 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2023-11-06 22:11:31,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:31,245 INFO L225 Difference]: With dead ends: 264 [2023-11-06 22:11:31,245 INFO L226 Difference]: Without dead ends: 189 [2023-11-06 22:11:31,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 174 SyntacticMatches, 34 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2100 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1449, Invalid=4251, Unknown=0, NotChecked=0, Total=5700 [2023-11-06 22:11:31,248 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 282 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:31,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 352 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:11:31,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-06 22:11:31,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 117. [2023-11-06 22:11:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2023-11-06 22:11:31,265 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 114 [2023-11-06 22:11:31,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:31,265 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2023-11-06 22:11:31,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:31,265 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2023-11-06 22:11:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-06 22:11:31,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:31,267 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:31,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-06 22:11:31,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:31,473 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:31,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:31,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1686980757, now seen corresponding path program 21 times [2023-11-06 22:11:31,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:31,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123217517] [2023-11-06 22:11:31,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:31,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 306 proven. 614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:32,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:32,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123217517] [2023-11-06 22:11:32,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123217517] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:32,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253967409] [2023-11-06 22:11:32,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:11:32,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:32,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:32,261 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:32,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:11:32,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2023-11-06 22:11:32,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:32,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 22:11:32,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:32,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:33,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253967409] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:33,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:33,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 25 [2023-11-06 22:11:33,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147690085] [2023-11-06 22:11:33,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:33,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:11:33,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:33,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:11:33,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:11:33,131 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:33,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:33,518 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2023-11-06 22:11:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-06 22:11:33,518 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2023-11-06 22:11:33,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:33,519 INFO L225 Difference]: With dead ends: 134 [2023-11-06 22:11:33,520 INFO L226 Difference]: Without dead ends: 132 [2023-11-06 22:11:33,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 211 SyntacticMatches, 35 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=719, Invalid=1261, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 22:11:33,521 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 49 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:33,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 178 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:11:33,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-06 22:11:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2023-11-06 22:11:33,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.032258064516129) internal successors, (128), 124 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:33,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2023-11-06 22:11:33,548 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 116 [2023-11-06 22:11:33,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:33,549 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2023-11-06 22:11:33,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:33,549 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2023-11-06 22:11:33,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-06 22:11:33,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:33,551 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:33,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:33,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:11:33,757 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:33,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:33,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1134152325, now seen corresponding path program 22 times [2023-11-06 22:11:33,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:33,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812791518] [2023-11-06 22:11:33,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:33,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 668 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:35,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:35,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812791518] [2023-11-06 22:11:35,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812791518] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:35,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733930214] [2023-11-06 22:11:35,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:11:35,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:35,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:35,024 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:35,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:11:35,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:11:35,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:35,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-06 22:11:35,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 722 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:36,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 722 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:36,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733930214] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:36,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:36,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 65 [2023-11-06 22:11:36,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422128141] [2023-11-06 22:11:36,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:36,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-06 22:11:36,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:36,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-06 22:11:36,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=970, Invalid=3190, Unknown=0, NotChecked=0, Total=4160 [2023-11-06 22:11:36,991 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:38,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:38,224 INFO L93 Difference]: Finished difference Result 367 states and 412 transitions. [2023-11-06 22:11:38,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-06 22:11:38,225 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2023-11-06 22:11:38,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:38,227 INFO L225 Difference]: With dead ends: 367 [2023-11-06 22:11:38,227 INFO L226 Difference]: Without dead ends: 209 [2023-11-06 22:11:38,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 189 SyntacticMatches, 35 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3514 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2629, Invalid=8083, Unknown=0, NotChecked=0, Total=10712 [2023-11-06 22:11:38,229 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 339 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:38,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 489 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:11:38,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-06 22:11:38,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 129. [2023-11-06 22:11:38,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.03125) internal successors, (132), 128 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:38,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2023-11-06 22:11:38,249 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 124 [2023-11-06 22:11:38,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:38,249 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2023-11-06 22:11:38,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:38,250 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2023-11-06 22:11:38,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-06 22:11:38,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:38,251 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:38,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:38,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 22:11:38,458 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:38,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:38,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1132082821, now seen corresponding path program 23 times [2023-11-06 22:11:38,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:38,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433421808] [2023-11-06 22:11:38,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:38,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 380 proven. 762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:39,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:39,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433421808] [2023-11-06 22:11:39,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433421808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:39,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728002462] [2023-11-06 22:11:39,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:11:39,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:39,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:39,402 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:39,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:11:39,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2023-11-06 22:11:39,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:39,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 22:11:39,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:39,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:40,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728002462] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:40,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:40,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 27 [2023-11-06 22:11:40,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771648111] [2023-11-06 22:11:40,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:40,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:11:40,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:40,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:11:40,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:11:40,360 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 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 22:11:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:40,771 INFO L93 Difference]: Finished difference Result 146 states and 150 transitions. [2023-11-06 22:11:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 22:11:40,772 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 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 128 [2023-11-06 22:11:40,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:40,773 INFO L225 Difference]: With dead ends: 146 [2023-11-06 22:11:40,773 INFO L226 Difference]: Without dead ends: 144 [2023-11-06 22:11:40,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 233 SyntacticMatches, 39 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=856, Invalid=1496, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 22:11:40,775 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 55 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:40,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 203 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:11:40,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-06 22:11:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2023-11-06 22:11:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0294117647058822) internal successors, (140), 136 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2023-11-06 22:11:40,795 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 128 [2023-11-06 22:11:40,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:40,796 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2023-11-06 22:11:40,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.592592592592593) internal successors, (151), 27 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 22:11:40,797 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2023-11-06 22:11:40,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-06 22:11:40,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:40,799 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:40,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:41,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 22:11:41,006 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:41,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:41,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1245590379, now seen corresponding path program 24 times [2023-11-06 22:11:41,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:41,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597910418] [2023-11-06 22:11:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:41,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 822 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:42,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:42,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597910418] [2023-11-06 22:11:42,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597910418] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:42,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101490525] [2023-11-06 22:11:42,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:11:42,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:42,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:42,341 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:42,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:11:42,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2023-11-06 22:11:42,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:42,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-06 22:11:42,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 882 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:43,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 882 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:44,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101490525] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:44,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:44,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 71 [2023-11-06 22:11:44,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625173774] [2023-11-06 22:11:44,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:44,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-06 22:11:44,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:44,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-06 22:11:44,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1154, Invalid=3816, Unknown=0, NotChecked=0, Total=4970 [2023-11-06 22:11:44,631 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:45,947 INFO L93 Difference]: Finished difference Result 403 states and 452 transitions. [2023-11-06 22:11:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-06 22:11:45,947 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2023-11-06 22:11:45,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:45,949 INFO L225 Difference]: With dead ends: 403 [2023-11-06 22:11:45,950 INFO L226 Difference]: Without dead ends: 229 [2023-11-06 22:11:45,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 207 SyntacticMatches, 39 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4243 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3155, Invalid=9727, Unknown=0, NotChecked=0, Total=12882 [2023-11-06 22:11:45,952 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 364 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:45,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 590 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:11:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-11-06 22:11:45,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 141. [2023-11-06 22:11:45,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:45,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2023-11-06 22:11:45,972 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 136 [2023-11-06 22:11:45,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:45,973 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2023-11-06 22:11:45,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.3380281690140845) internal successors, (237), 71 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:45,973 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2023-11-06 22:11:45,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-06 22:11:45,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:45,975 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:45,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:46,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:11:46,181 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:46,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:46,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1485376139, now seen corresponding path program 25 times [2023-11-06 22:11:46,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:46,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010809645] [2023-11-06 22:11:46,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:46,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 462 proven. 926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:47,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:47,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010809645] [2023-11-06 22:11:47,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010809645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:47,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972071742] [2023-11-06 22:11:47,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:11:47,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:47,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:47,216 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:47,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:11:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:47,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 22:11:47,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:47,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:48,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972071742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:48,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:48,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 29 [2023-11-06 22:11:48,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662619749] [2023-11-06 22:11:48,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:48,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:11:48,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:48,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:11:48,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:11:48,246 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 29 states, 29 states have (on average 5.620689655172414) internal successors, (163), 29 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 22:11:48,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:48,681 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2023-11-06 22:11:48,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-06 22:11:48,682 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.620689655172414) internal successors, (163), 29 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 140 [2023-11-06 22:11:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:48,683 INFO L225 Difference]: With dead ends: 158 [2023-11-06 22:11:48,683 INFO L226 Difference]: Without dead ends: 156 [2023-11-06 22:11:48,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 255 SyntacticMatches, 43 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1005, Invalid=1751, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 22:11:48,684 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 61 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:48,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 250 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:11:48,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-06 22:11:48,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 149. [2023-11-06 22:11:48,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:48,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2023-11-06 22:11:48,708 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 140 [2023-11-06 22:11:48,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:48,708 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2023-11-06 22:11:48,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.620689655172414) internal successors, (163), 29 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 22:11:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2023-11-06 22:11:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-06 22:11:48,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:48,711 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:48,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:48,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:11:48,917 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:48,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:48,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1127939493, now seen corresponding path program 26 times [2023-11-06 22:11:48,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:48,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177645777] [2023-11-06 22:11:48,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:48,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 992 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:50,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:50,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177645777] [2023-11-06 22:11:50,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177645777] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:50,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525062055] [2023-11-06 22:11:50,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:11:50,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:50,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:50,508 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:50,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:11:50,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:11:50,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:50,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 22:11:50,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:11:51,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:11:52,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525062055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:52,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:52,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 74 [2023-11-06 22:11:52,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533590071] [2023-11-06 22:11:52,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:52,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-11-06 22:11:52,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:52,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-11-06 22:11:52,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=4174, Unknown=0, NotChecked=0, Total=5402 [2023-11-06 22:11:52,891 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:53,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:53,866 INFO L93 Difference]: Finished difference Result 340 states and 390 transitions. [2023-11-06 22:11:53,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 22:11:53,867 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2023-11-06 22:11:53,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:53,869 INFO L225 Difference]: With dead ends: 340 [2023-11-06 22:11:53,869 INFO L226 Difference]: Without dead ends: 243 [2023-11-06 22:11:53,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 227 SyntacticMatches, 44 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3471 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2334, Invalid=6978, Unknown=0, NotChecked=0, Total=9312 [2023-11-06 22:11:53,871 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 298 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:53,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 475 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:11:53,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-11-06 22:11:53,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 151. [2023-11-06 22:11:53,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 150 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:53,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2023-11-06 22:11:53,899 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 148 [2023-11-06 22:11:53,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:53,899 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2023-11-06 22:11:53,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.3513513513513513) internal successors, (248), 74 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:53,900 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2023-11-06 22:11:53,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-06 22:11:53,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:53,903 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:53,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:54,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:11:54,109 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:54,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:54,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1461075584, now seen corresponding path program 27 times [2023-11-06 22:11:54,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:54,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341320035] [2023-11-06 22:11:54,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:54,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 992 proven. 618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:55,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:55,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341320035] [2023-11-06 22:11:55,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341320035] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:55,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755441311] [2023-11-06 22:11:55,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:11:55,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:55,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:55,782 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:55,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:11:55,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-11-06 22:11:55,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:55,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 22:11:55,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 1058 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:57,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 1058 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:58,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755441311] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:58,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:58,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 76 [2023-11-06 22:11:58,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738398792] [2023-11-06 22:11:58,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:58,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-11-06 22:11:58,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:58,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-11-06 22:11:58,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1303, Invalid=4397, Unknown=0, NotChecked=0, Total=5700 [2023-11-06 22:11:58,327 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 76 states, 76 states have (on average 3.289473684210526) internal successors, (250), 76 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:59,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:11:59,299 INFO L93 Difference]: Finished difference Result 348 states and 400 transitions. [2023-11-06 22:11:59,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-06 22:11:59,299 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.289473684210526) internal successors, (250), 76 states have internal predecessors, (250), 0 states have call successors, (0), 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 150 [2023-11-06 22:11:59,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:11:59,301 INFO L225 Difference]: With dead ends: 348 [2023-11-06 22:11:59,301 INFO L226 Difference]: Without dead ends: 249 [2023-11-06 22:11:59,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 228 SyntacticMatches, 46 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3672 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2505, Invalid=7395, Unknown=0, NotChecked=0, Total=9900 [2023-11-06 22:11:59,303 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 388 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:11:59,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 492 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:11:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-11-06 22:11:59,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 153. [2023-11-06 22:11:59,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0263157894736843) internal successors, (156), 152 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2023-11-06 22:11:59,328 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 150 [2023-11-06 22:11:59,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:11:59,329 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2023-11-06 22:11:59,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.289473684210526) internal successors, (250), 76 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:11:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2023-11-06 22:11:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-06 22:11:59,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:11:59,330 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:59,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:59,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:59,537 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:11:59,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:59,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1576467099, now seen corresponding path program 28 times [2023-11-06 22:11:59,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:59,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850366346] [2023-11-06 22:11:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:59,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 552 proven. 1106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:00,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:00,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850366346] [2023-11-06 22:12:00,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850366346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:00,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634832007] [2023-11-06 22:12:00,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:12:00,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:00,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:00,551 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:00,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:12:00,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:12:00,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:00,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-06 22:12:00,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 600 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:00,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 600 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:01,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634832007] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:01,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:01,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 31 [2023-11-06 22:12:01,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769368937] [2023-11-06 22:12:01,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:01,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 22:12:01,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:01,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 22:12:01,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:12:01,640 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 31 states, 31 states have (on average 5.645161290322581) internal successors, (175), 31 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:02,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:12:02,194 INFO L93 Difference]: Finished difference Result 170 states and 174 transitions. [2023-11-06 22:12:02,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-06 22:12:02,194 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.645161290322581) internal successors, (175), 31 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2023-11-06 22:12:02,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:12:02,195 INFO L225 Difference]: With dead ends: 170 [2023-11-06 22:12:02,196 INFO L226 Difference]: Without dead ends: 168 [2023-11-06 22:12:02,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 277 SyntacticMatches, 47 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1166, Invalid=2026, Unknown=0, NotChecked=0, Total=3192 [2023-11-06 22:12:02,197 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 36 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:12:02,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 275 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:12:02,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-06 22:12:02,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 161. [2023-11-06 22:12:02,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.025) internal successors, (164), 160 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2023-11-06 22:12:02,220 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 152 [2023-11-06 22:12:02,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:12:02,220 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2023-11-06 22:12:02,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.645161290322581) internal successors, (175), 31 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:02,221 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2023-11-06 22:12:02,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-11-06 22:12:02,221 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:12:02,222 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:02,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:02,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-06 22:12:02,428 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:12:02,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:02,428 INFO L85 PathProgramCache]: Analyzing trace with hash 134226507, now seen corresponding path program 29 times [2023-11-06 22:12:02,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:02,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794667223] [2023-11-06 22:12:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:02,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1178 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:04,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:04,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794667223] [2023-11-06 22:12:04,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794667223] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:04,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438324965] [2023-11-06 22:12:04,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:12:04,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:04,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:04,305 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:04,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 22:12:04,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2023-11-06 22:12:04,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:04,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-06 22:12:04,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1250 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:06,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1250 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:07,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438324965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:07,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:07,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 83 [2023-11-06 22:12:07,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922081427] [2023-11-06 22:12:07,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:07,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-11-06 22:12:07,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:07,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-11-06 22:12:07,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1570, Invalid=5236, Unknown=0, NotChecked=0, Total=6806 [2023-11-06 22:12:07,263 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand has 83 states, 83 states have (on average 3.3373493975903616) internal successors, (277), 83 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:09,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:12:09,075 INFO L93 Difference]: Finished difference Result 475 states and 532 transitions. [2023-11-06 22:12:09,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-06 22:12:09,075 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.3373493975903616) internal successors, (277), 83 states have internal predecessors, (277), 0 states have call successors, (0), 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 160 [2023-11-06 22:12:09,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:12:09,077 INFO L225 Difference]: With dead ends: 475 [2023-11-06 22:12:09,078 INFO L226 Difference]: Without dead ends: 269 [2023-11-06 22:12:09,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 243 SyntacticMatches, 47 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5905 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4351, Invalid=13471, Unknown=0, NotChecked=0, Total=17822 [2023-11-06 22:12:09,081 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 490 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:12:09,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 698 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:12:09,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-11-06 22:12:09,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 165. [2023-11-06 22:12:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:09,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2023-11-06 22:12:09,110 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 160 [2023-11-06 22:12:09,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:12:09,111 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2023-11-06 22:12:09,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.3373493975903616) internal successors, (277), 83 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:09,112 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2023-11-06 22:12:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-06 22:12:09,113 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:12:09,113 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:09,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:09,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-06 22:12:09,321 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:12:09,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:09,321 INFO L85 PathProgramCache]: Analyzing trace with hash 24503893, now seen corresponding path program 30 times [2023-11-06 22:12:09,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:09,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853866827] [2023-11-06 22:12:09,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:09,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 650 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:10,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:10,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853866827] [2023-11-06 22:12:10,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853866827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:10,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306400470] [2023-11-06 22:12:10,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:12:10,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:10,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:10,585 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:10,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 22:12:10,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2023-11-06 22:12:10,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:10,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-06 22:12:10,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 702 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:11,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 702 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:11,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306400470] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:11,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:11,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 33 [2023-11-06 22:12:11,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933414898] [2023-11-06 22:12:11,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:11,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 22:12:11,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:11,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 22:12:11,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:12:11,841 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:12,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:12:12,434 INFO L93 Difference]: Finished difference Result 182 states and 186 transitions. [2023-11-06 22:12:12,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-06 22:12:12,435 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2023-11-06 22:12:12,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:12:12,436 INFO L225 Difference]: With dead ends: 182 [2023-11-06 22:12:12,436 INFO L226 Difference]: Without dead ends: 180 [2023-11-06 22:12:12,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 299 SyntacticMatches, 51 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1339, Invalid=2321, Unknown=0, NotChecked=0, Total=3660 [2023-11-06 22:12:12,437 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 42 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:12:12,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 290 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:12:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-06 22:12:12,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 173. [2023-11-06 22:12:12,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 172 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:12,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2023-11-06 22:12:12,462 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 164 [2023-11-06 22:12:12,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:12:12,462 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2023-11-06 22:12:12,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.666666666666667) internal successors, (187), 33 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:12,463 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2023-11-06 22:12:12,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-06 22:12:12,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:12:12,464 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:12,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:12,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-06 22:12:12,666 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:12:12,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:12,666 INFO L85 PathProgramCache]: Analyzing trace with hash 481628987, now seen corresponding path program 31 times [2023-11-06 22:12:12,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:12,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838502026] [2023-11-06 22:12:12,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:12,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1380 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:14,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:14,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838502026] [2023-11-06 22:12:14,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838502026] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:14,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009810417] [2023-11-06 22:12:14,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:12:14,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:14,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:14,542 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:14,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 22:12:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:14,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-06 22:12:14,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1456 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:12:16,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1456 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:12:17,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009810417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:17,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:17,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 86 [2023-11-06 22:12:17,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105693263] [2023-11-06 22:12:17,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:17,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-11-06 22:12:17,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:17,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-11-06 22:12:17,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1656, Invalid=5654, Unknown=0, NotChecked=0, Total=7310 [2023-11-06 22:12:17,983 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand has 86 states, 86 states have (on average 3.3488372093023258) internal successors, (288), 86 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:19,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:12:19,199 INFO L93 Difference]: Finished difference Result 396 states and 454 transitions. [2023-11-06 22:12:19,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-06 22:12:19,199 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.3488372093023258) internal successors, (288), 86 states have internal predecessors, (288), 0 states have call successors, (0), 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 172 [2023-11-06 22:12:19,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:12:19,201 INFO L225 Difference]: With dead ends: 396 [2023-11-06 22:12:19,201 INFO L226 Difference]: Without dead ends: 283 [2023-11-06 22:12:19,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 263 SyntacticMatches, 52 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4727 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3170, Invalid=9486, Unknown=0, NotChecked=0, Total=12656 [2023-11-06 22:12:19,203 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 398 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:12:19,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 635 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:12:19,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-06 22:12:19,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 175. [2023-11-06 22:12:19,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0229885057471264) internal successors, (178), 174 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:19,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2023-11-06 22:12:19,229 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 172 [2023-11-06 22:12:19,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:12:19,230 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2023-11-06 22:12:19,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.3488372093023258) internal successors, (288), 86 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:19,230 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2023-11-06 22:12:19,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-11-06 22:12:19,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:12:19,231 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:19,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:19,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-06 22:12:19,436 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:12:19,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash -2129825696, now seen corresponding path program 32 times [2023-11-06 22:12:19,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:19,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124535412] [2023-11-06 22:12:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:19,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1380 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:21,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:21,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124535412] [2023-11-06 22:12:21,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124535412] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:21,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545408455] [2023-11-06 22:12:21,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:12:21,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:21,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:21,327 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:21,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 22:12:21,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:12:21,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:21,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-06 22:12:21,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1458 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:23,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1458 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:25,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545408455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:25,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:25,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 88 [2023-11-06 22:12:25,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188679369] [2023-11-06 22:12:25,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:25,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-11-06 22:12:25,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:25,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-11-06 22:12:25,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1743, Invalid=5913, Unknown=0, NotChecked=0, Total=7656 [2023-11-06 22:12:25,065 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 88 states, 88 states have (on average 3.2954545454545454) internal successors, (290), 88 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:26,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:12:26,363 INFO L93 Difference]: Finished difference Result 404 states and 464 transitions. [2023-11-06 22:12:26,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-06 22:12:26,363 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.2954545454545454) internal successors, (290), 88 states have internal predecessors, (290), 0 states have call successors, (0), 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 174 [2023-11-06 22:12:26,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:12:26,365 INFO L225 Difference]: With dead ends: 404 [2023-11-06 22:12:26,365 INFO L226 Difference]: Without dead ends: 289 [2023-11-06 22:12:26,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 264 SyntacticMatches, 54 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4960 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3369, Invalid=9971, Unknown=0, NotChecked=0, Total=13340 [2023-11-06 22:12:26,366 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 388 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:12:26,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 628 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:12:26,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-06 22:12:26,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 177. [2023-11-06 22:12:26,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0227272727272727) internal successors, (180), 176 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:26,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2023-11-06 22:12:26,395 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 174 [2023-11-06 22:12:26,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:12:26,395 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2023-11-06 22:12:26,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.2954545454545454) internal successors, (290), 88 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:26,396 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2023-11-06 22:12:26,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-06 22:12:26,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:12:26,396 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:26,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:26,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-06 22:12:26,597 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:12:26,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:26,598 INFO L85 PathProgramCache]: Analyzing trace with hash 818092101, now seen corresponding path program 33 times [2023-11-06 22:12:26,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:26,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564783025] [2023-11-06 22:12:26,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:26,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 756 proven. 1514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:27,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:27,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564783025] [2023-11-06 22:12:27,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564783025] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:27,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117459861] [2023-11-06 22:12:27,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:12:27,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:27,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:27,735 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:27,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-06 22:12:27,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2023-11-06 22:12:27,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:27,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-06 22:12:27,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:28,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 812 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:28,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 812 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:29,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117459861] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:29,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:29,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 35 [2023-11-06 22:12:29,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047522174] [2023-11-06 22:12:29,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:29,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 22:12:29,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:29,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 22:12:29,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=685, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:12:29,178 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand has 35 states, 35 states have (on average 5.685714285714286) internal successors, (199), 35 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:29,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:12:29,765 INFO L93 Difference]: Finished difference Result 194 states and 198 transitions. [2023-11-06 22:12:29,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-06 22:12:29,765 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.685714285714286) internal successors, (199), 35 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2023-11-06 22:12:29,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:12:29,767 INFO L225 Difference]: With dead ends: 194 [2023-11-06 22:12:29,767 INFO L226 Difference]: Without dead ends: 192 [2023-11-06 22:12:29,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 321 SyntacticMatches, 55 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1524, Invalid=2636, Unknown=0, NotChecked=0, Total=4160 [2023-11-06 22:12:29,768 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 67 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:12:29,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 257 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:12:29,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-06 22:12:29,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 185. [2023-11-06 22:12:29,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0217391304347827) internal successors, (188), 184 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:29,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2023-11-06 22:12:29,788 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 176 [2023-11-06 22:12:29,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:12:29,789 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2023-11-06 22:12:29,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.685714285714286) internal successors, (199), 35 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:29,789 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2023-11-06 22:12:29,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-11-06 22:12:29,790 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:12:29,790 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:29,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-06 22:12:29,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-06 22:12:29,997 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:12:29,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:29,998 INFO L85 PathProgramCache]: Analyzing trace with hash -932621013, now seen corresponding path program 34 times [2023-11-06 22:12:29,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:29,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377688886] [2023-11-06 22:12:29,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:29,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1598 proven. 896 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:31,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:31,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377688886] [2023-11-06 22:12:31,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377688886] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:31,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757009154] [2023-11-06 22:12:31,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:12:31,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:31,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:31,990 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:32,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-06 22:12:32,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:12:32,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:32,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-06 22:12:32,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1682 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:34,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1682 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:35,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757009154] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:35,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:35,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 95 [2023-11-06 22:12:35,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787295471] [2023-11-06 22:12:35,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:35,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-11-06 22:12:35,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:35,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-11-06 22:12:35,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2050, Invalid=6880, Unknown=0, NotChecked=0, Total=8930 [2023-11-06 22:12:35,536 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand has 95 states, 95 states have (on average 3.336842105263158) internal successors, (317), 95 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:37,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:12:37,784 INFO L93 Difference]: Finished difference Result 547 states and 612 transitions. [2023-11-06 22:12:37,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-11-06 22:12:37,785 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.336842105263158) internal successors, (317), 95 states have internal predecessors, (317), 0 states have call successors, (0), 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 184 [2023-11-06 22:12:37,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:12:37,787 INFO L225 Difference]: With dead ends: 547 [2023-11-06 22:12:37,787 INFO L226 Difference]: Without dead ends: 309 [2023-11-06 22:12:37,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 279 SyntacticMatches, 55 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7839 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5739, Invalid=17823, Unknown=0, NotChecked=0, Total=23562 [2023-11-06 22:12:37,790 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 515 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:12:37,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 849 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:12:37,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-11-06 22:12:37,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 189. [2023-11-06 22:12:37,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0212765957446808) internal successors, (192), 188 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:37,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 192 transitions. [2023-11-06 22:12:37,823 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 192 transitions. Word has length 184 [2023-11-06 22:12:37,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:12:37,823 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 192 transitions. [2023-11-06 22:12:37,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.336842105263158) internal successors, (317), 95 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:37,824 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 192 transitions. [2023-11-06 22:12:37,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-06 22:12:37,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:12:37,825 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:37,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:38,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-06 22:12:38,033 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:12:38,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:38,034 INFO L85 PathProgramCache]: Analyzing trace with hash 397810485, now seen corresponding path program 35 times [2023-11-06 22:12:38,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:38,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900211152] [2023-11-06 22:12:38,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:38,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2612 backedges. 870 proven. 1742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:39,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:39,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900211152] [2023-11-06 22:12:39,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900211152] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:39,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075552427] [2023-11-06 22:12:39,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:12:39,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:39,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:39,368 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:39,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-06 22:12:39,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2023-11-06 22:12:39,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:39,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-06 22:12:39,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2612 backedges. 930 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:39,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2612 backedges. 930 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:40,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075552427] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:40,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:40,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 37 [2023-11-06 22:12:40,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647958582] [2023-11-06 22:12:40,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:40,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-06 22:12:40,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:40,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-06 22:12:40,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=762, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:12:40,874 INFO L87 Difference]: Start difference. First operand 189 states and 192 transitions. Second operand has 37 states, 37 states have (on average 5.702702702702703) internal successors, (211), 37 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:41,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:12:41,587 INFO L93 Difference]: Finished difference Result 206 states and 210 transitions. [2023-11-06 22:12:41,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-06 22:12:41,588 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.702702702702703) internal successors, (211), 37 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2023-11-06 22:12:41,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:12:41,590 INFO L225 Difference]: With dead ends: 206 [2023-11-06 22:12:41,590 INFO L226 Difference]: Without dead ends: 204 [2023-11-06 22:12:41,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 343 SyntacticMatches, 59 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1721, Invalid=2971, Unknown=0, NotChecked=0, Total=4692 [2023-11-06 22:12:41,592 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 71 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:12:41,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 288 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:12:41,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-11-06 22:12:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 197. [2023-11-06 22:12:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0204081632653061) internal successors, (200), 196 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 200 transitions. [2023-11-06 22:12:41,627 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 200 transitions. Word has length 188 [2023-11-06 22:12:41,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:12:41,645 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 200 transitions. [2023-11-06 22:12:41,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.702702702702703) internal successors, (211), 37 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:41,645 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 200 transitions. [2023-11-06 22:12:41,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-11-06 22:12:41,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:12:41,646 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:41,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:41,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-06 22:12:41,847 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:12:41,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:41,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1788712933, now seen corresponding path program 36 times [2023-11-06 22:12:41,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:41,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611150283] [2023-11-06 22:12:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:41,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 1832 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:44,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:44,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611150283] [2023-11-06 22:12:44,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611150283] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:44,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603974363] [2023-11-06 22:12:44,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:12:44,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:44,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:44,008 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:44,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-06 22:12:44,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2023-11-06 22:12:44,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:44,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-06 22:12:44,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 1922 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:46,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 1922 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:48,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603974363] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:48,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:48,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 101 [2023-11-06 22:12:48,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386167965] [2023-11-06 22:12:48,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:48,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-06 22:12:48,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:48,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-06 22:12:48,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2314, Invalid=7786, Unknown=0, NotChecked=0, Total=10100 [2023-11-06 22:12:48,127 INFO L87 Difference]: Start difference. First operand 197 states and 200 transitions. Second operand has 101 states, 101 states have (on average 3.3366336633663365) internal successors, (337), 101 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:50,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:12:50,738 INFO L93 Difference]: Finished difference Result 583 states and 652 transitions. [2023-11-06 22:12:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-06 22:12:50,738 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.3366336633663365) internal successors, (337), 101 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2023-11-06 22:12:50,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:12:50,741 INFO L225 Difference]: With dead ends: 583 [2023-11-06 22:12:50,741 INFO L226 Difference]: Without dead ends: 329 [2023-11-06 22:12:50,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 297 SyntacticMatches, 59 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8908 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=6505, Invalid=20227, Unknown=0, NotChecked=0, Total=26732 [2023-11-06 22:12:50,744 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 612 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:12:50,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 1005 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:12:50,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-11-06 22:12:50,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 201. [2023-11-06 22:12:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.02) internal successors, (204), 200 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:50,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 204 transitions. [2023-11-06 22:12:50,780 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 204 transitions. Word has length 196 [2023-11-06 22:12:50,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:12:50,780 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 204 transitions. [2023-11-06 22:12:50,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.3366336633663365) internal successors, (337), 101 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:50,781 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 204 transitions. [2023-11-06 22:12:50,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-06 22:12:50,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:12:50,782 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:50,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:50,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-06 22:12:50,989 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:12:50,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:50,989 INFO L85 PathProgramCache]: Analyzing trace with hash -86741211, now seen corresponding path program 37 times [2023-11-06 22:12:50,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:50,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333915972] [2023-11-06 22:12:50,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:50,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2978 backedges. 992 proven. 1986 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:52,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:52,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333915972] [2023-11-06 22:12:52,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333915972] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:52,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676949275] [2023-11-06 22:12:52,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:12:52,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:52,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:52,546 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:52,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-06 22:12:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:52,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-06 22:12:52,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2978 backedges. 1056 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:52,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2978 backedges. 1056 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:54,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676949275] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:54,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:54,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 39 [2023-11-06 22:12:54,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818804190] [2023-11-06 22:12:54,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:54,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-06 22:12:54,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:54,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-06 22:12:54,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=843, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 22:12:54,090 INFO L87 Difference]: Start difference. First operand 201 states and 204 transitions. Second operand has 39 states, 39 states have (on average 5.717948717948718) internal successors, (223), 39 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:12:54,799 INFO L93 Difference]: Finished difference Result 218 states and 222 transitions. [2023-11-06 22:12:54,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-06 22:12:54,800 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.717948717948718) internal successors, (223), 39 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2023-11-06 22:12:54,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:12:54,802 INFO L225 Difference]: With dead ends: 218 [2023-11-06 22:12:54,802 INFO L226 Difference]: Without dead ends: 216 [2023-11-06 22:12:54,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 365 SyntacticMatches, 63 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2515 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1930, Invalid=3326, Unknown=0, NotChecked=0, Total=5256 [2023-11-06 22:12:54,803 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 44 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:12:54,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 323 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:12:54,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-06 22:12:54,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 209. [2023-11-06 22:12:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0192307692307692) internal successors, (212), 208 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 212 transitions. [2023-11-06 22:12:54,836 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 212 transitions. Word has length 200 [2023-11-06 22:12:54,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:12:54,837 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 212 transitions. [2023-11-06 22:12:54,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.717948717948718) internal successors, (223), 39 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:12:54,837 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 212 transitions. [2023-11-06 22:12:54,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-11-06 22:12:54,839 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:12:54,839 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:54,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:55,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-06 22:12:55,047 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:12:55,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:55,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1431974901, now seen corresponding path program 38 times [2023-11-06 22:12:55,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:55,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049675752] [2023-11-06 22:12:55,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:55,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 2082 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:57,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:57,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049675752] [2023-11-06 22:12:57,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049675752] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:57,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143718534] [2023-11-06 22:12:57,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:12:57,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:57,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:57,623 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:57,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-06 22:12:57,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:12:57,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:57,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-06 22:12:57,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 2176 proven. 1056 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:13:00,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:01,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 2176 proven. 1056 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:13:01,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143718534] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:01,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:01,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 104 [2023-11-06 22:13:01,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784904632] [2023-11-06 22:13:01,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:01,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2023-11-06 22:13:01,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:02,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2023-11-06 22:13:02,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2418, Invalid=8294, Unknown=0, NotChecked=0, Total=10712 [2023-11-06 22:13:02,002 INFO L87 Difference]: Start difference. First operand 209 states and 212 transitions. Second operand has 104 states, 104 states have (on average 3.3461538461538463) internal successors, (348), 104 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:03,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:13:03,773 INFO L93 Difference]: Finished difference Result 480 states and 550 transitions. [2023-11-06 22:13:03,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-06 22:13:03,773 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.3461538461538463) internal successors, (348), 104 states have internal predecessors, (348), 0 states have call successors, (0), 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 208 [2023-11-06 22:13:03,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:13:03,775 INFO L225 Difference]: With dead ends: 480 [2023-11-06 22:13:03,776 INFO L226 Difference]: Without dead ends: 343 [2023-11-06 22:13:03,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 317 SyntacticMatches, 64 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6971 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=4664, Invalid=13968, Unknown=0, NotChecked=0, Total=18632 [2023-11-06 22:13:03,778 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 436 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:13:03,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 747 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:13:03,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-11-06 22:13:03,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 211. [2023-11-06 22:13:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.019047619047619) internal successors, (214), 210 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 214 transitions. [2023-11-06 22:13:03,810 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 214 transitions. Word has length 208 [2023-11-06 22:13:03,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:13:03,811 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 214 transitions. [2023-11-06 22:13:03,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.3461538461538463) internal successors, (348), 104 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:03,811 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 214 transitions. [2023-11-06 22:13:03,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-11-06 22:13:03,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:13:03,813 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:03,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-06 22:13:04,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-06 22:13:04,020 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:13:04,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:04,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1844102480, now seen corresponding path program 39 times [2023-11-06 22:13:04,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:04,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063354776] [2023-11-06 22:13:04,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:04,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 2082 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:06,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:06,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063354776] [2023-11-06 22:13:06,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063354776] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:06,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785646410] [2023-11-06 22:13:06,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:13:06,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:06,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:06,632 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:06,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-06 22:13:06,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2023-11-06 22:13:06,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:06,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-06 22:13:06,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 2178 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:09,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 2178 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:11,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785646410] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:11,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:11,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 106 [2023-11-06 22:13:11,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507540776] [2023-11-06 22:13:11,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:11,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2023-11-06 22:13:11,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:11,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2023-11-06 22:13:11,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2523, Invalid=8607, Unknown=0, NotChecked=0, Total=11130 [2023-11-06 22:13:11,328 INFO L87 Difference]: Start difference. First operand 211 states and 214 transitions. Second operand has 106 states, 106 states have (on average 3.30188679245283) internal successors, (350), 106 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:13,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:13:13,301 INFO L93 Difference]: Finished difference Result 488 states and 560 transitions. [2023-11-06 22:13:13,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-06 22:13:13,302 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.30188679245283) internal successors, (350), 106 states have internal predecessors, (350), 0 states have call successors, (0), 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 210 [2023-11-06 22:13:13,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:13:13,304 INFO L225 Difference]: With dead ends: 488 [2023-11-06 22:13:13,305 INFO L226 Difference]: Without dead ends: 349 [2023-11-06 22:13:13,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 318 SyntacticMatches, 66 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7252 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4905, Invalid=14555, Unknown=0, NotChecked=0, Total=19460 [2023-11-06 22:13:13,308 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 631 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:13:13,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 756 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:13:13,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-11-06 22:13:13,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 213. [2023-11-06 22:13:13,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0188679245283019) internal successors, (216), 212 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:13,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 216 transitions. [2023-11-06 22:13:13,351 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 216 transitions. Word has length 210 [2023-11-06 22:13:13,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:13:13,352 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 216 transitions. [2023-11-06 22:13:13,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.30188679245283) internal successors, (350), 106 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:13,352 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 216 transitions. [2023-11-06 22:13:13,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-11-06 22:13:13,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:13:13,354 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:13,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:13,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:13,563 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:13:13,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:13,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1533252629, now seen corresponding path program 40 times [2023-11-06 22:13:13,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:13,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693340336] [2023-11-06 22:13:13,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:13,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3368 backedges. 1122 proven. 2246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:15,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:15,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693340336] [2023-11-06 22:13:15,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693340336] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:15,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012704262] [2023-11-06 22:13:15,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:13:15,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:15,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:15,133 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:15,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-06 22:13:15,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:13:15,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:15,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-06 22:13:15,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3368 backedges. 1190 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:15,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3368 backedges. 1190 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:16,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012704262] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:16,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:16,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 41 [2023-11-06 22:13:16,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987541378] [2023-11-06 22:13:16,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:16,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 22:13:16,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:16,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 22:13:16,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=928, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:13:16,847 INFO L87 Difference]: Start difference. First operand 213 states and 216 transitions. Second operand has 41 states, 41 states have (on average 5.7317073170731705) internal successors, (235), 41 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:17,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:13:17,587 INFO L93 Difference]: Finished difference Result 230 states and 234 transitions. [2023-11-06 22:13:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-06 22:13:17,588 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.7317073170731705) internal successors, (235), 41 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2023-11-06 22:13:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:13:17,590 INFO L225 Difference]: With dead ends: 230 [2023-11-06 22:13:17,590 INFO L226 Difference]: Without dead ends: 228 [2023-11-06 22:13:17,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 387 SyntacticMatches, 67 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2809 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2151, Invalid=3701, Unknown=0, NotChecked=0, Total=5852 [2023-11-06 22:13:17,591 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 46 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:13:17,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 342 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:13:17,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-11-06 22:13:17,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 221. [2023-11-06 22:13:17,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.018181818181818) internal successors, (224), 220 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:17,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 224 transitions. [2023-11-06 22:13:17,628 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 224 transitions. Word has length 212 [2023-11-06 22:13:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:13:17,629 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 224 transitions. [2023-11-06 22:13:17,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.7317073170731705) internal successors, (235), 41 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:17,629 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 224 transitions. [2023-11-06 22:13:17,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-11-06 22:13:17,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:13:17,631 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:17,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:17,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:17,831 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:13:17,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:17,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1409744645, now seen corresponding path program 41 times [2023-11-06 22:13:17,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:17,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297083568] [2023-11-06 22:13:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:17,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:20,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 2348 proven. 1292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:20,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:20,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297083568] [2023-11-06 22:13:20,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297083568] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:20,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542223313] [2023-11-06 22:13:20,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:13:20,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:20,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:20,613 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:20,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-06 22:13:20,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2023-11-06 22:13:20,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:20,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-06 22:13:20,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 2450 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:23,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 2450 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:25,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542223313] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:25,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:25,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 113 [2023-11-06 22:13:25,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327697423] [2023-11-06 22:13:25,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:25,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-11-06 22:13:25,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:25,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-11-06 22:13:25,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2890, Invalid=9766, Unknown=0, NotChecked=0, Total=12656 [2023-11-06 22:13:25,572 INFO L87 Difference]: Start difference. First operand 221 states and 224 transitions. Second operand has 113 states, 113 states have (on average 3.336283185840708) internal successors, (377), 113 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:13:28,759 INFO L93 Difference]: Finished difference Result 655 states and 732 transitions. [2023-11-06 22:13:28,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-11-06 22:13:28,760 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 3.336283185840708) internal successors, (377), 113 states have internal predecessors, (377), 0 states have call successors, (0), 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 220 [2023-11-06 22:13:28,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:13:28,761 INFO L225 Difference]: With dead ends: 655 [2023-11-06 22:13:28,762 INFO L226 Difference]: Without dead ends: 369 [2023-11-06 22:13:28,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 333 SyntacticMatches, 67 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11250 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=8181, Invalid=25491, Unknown=0, NotChecked=0, Total=33672 [2023-11-06 22:13:28,764 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 768 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:13:28,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 1180 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:13:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-11-06 22:13:28,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 225. [2023-11-06 22:13:28,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0178571428571428) internal successors, (228), 224 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 228 transitions. [2023-11-06 22:13:28,805 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 228 transitions. Word has length 220 [2023-11-06 22:13:28,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:13:28,805 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 228 transitions. [2023-11-06 22:13:28,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 3.336283185840708) internal successors, (377), 113 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:28,806 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 228 transitions. [2023-11-06 22:13:28,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-11-06 22:13:28,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:13:28,807 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:28,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:29,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:29,015 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:13:29,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:29,015 INFO L85 PathProgramCache]: Analyzing trace with hash -680982011, now seen corresponding path program 42 times [2023-11-06 22:13:29,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:29,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149938453] [2023-11-06 22:13:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:29,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 1260 proven. 2522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:30,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:30,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149938453] [2023-11-06 22:13:30,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149938453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:30,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133567588] [2023-11-06 22:13:30,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:13:30,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:30,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:30,849 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:30,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-06 22:13:31,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2023-11-06 22:13:31,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:31,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-06 22:13:31,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 1332 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:31,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 1332 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:32,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133567588] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:32,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:32,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 43 [2023-11-06 22:13:32,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073949005] [2023-11-06 22:13:32,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:32,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-06 22:13:32,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:32,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-06 22:13:32,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=789, Invalid=1017, Unknown=0, NotChecked=0, Total=1806 [2023-11-06 22:13:32,803 INFO L87 Difference]: Start difference. First operand 225 states and 228 transitions. Second operand has 43 states, 43 states have (on average 5.744186046511628) internal successors, (247), 43 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:33,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:13:33,599 INFO L93 Difference]: Finished difference Result 242 states and 246 transitions. [2023-11-06 22:13:33,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-06 22:13:33,600 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.744186046511628) internal successors, (247), 43 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2023-11-06 22:13:33,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:13:33,604 INFO L225 Difference]: With dead ends: 242 [2023-11-06 22:13:33,604 INFO L226 Difference]: Without dead ends: 240 [2023-11-06 22:13:33,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 409 SyntacticMatches, 71 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3119 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2384, Invalid=4096, Unknown=0, NotChecked=0, Total=6480 [2023-11-06 22:13:33,606 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 85 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:13:33,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 276 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:13:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-11-06 22:13:33,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 233. [2023-11-06 22:13:33,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.0172413793103448) internal successors, (236), 232 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:33,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 236 transitions. [2023-11-06 22:13:33,654 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 236 transitions. Word has length 224 [2023-11-06 22:13:33,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:13:33,654 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 236 transitions. [2023-11-06 22:13:33,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.744186046511628) internal successors, (247), 43 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:33,655 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 236 transitions. [2023-11-06 22:13:33,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2023-11-06 22:13:33,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:13:33,657 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:33,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:33,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:33,864 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:13:33,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:33,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1713273109, now seen corresponding path program 43 times [2023-11-06 22:13:33,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:33,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010970760] [2023-11-06 22:13:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:33,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4070 backedges. 2630 proven. 1440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:37,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:37,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010970760] [2023-11-06 22:13:37,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010970760] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:37,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136045031] [2023-11-06 22:13:37,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:13:37,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:37,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:37,069 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:37,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-06 22:13:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:37,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-06 22:13:37,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4070 backedges. 2736 proven. 1332 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:13:40,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4070 backedges. 2736 proven. 1332 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:13:42,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136045031] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:42,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:42,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 116 [2023-11-06 22:13:42,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528503377] [2023-11-06 22:13:42,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:42,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2023-11-06 22:13:42,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:42,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2023-11-06 22:13:42,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3006, Invalid=10334, Unknown=0, NotChecked=0, Total=13340 [2023-11-06 22:13:42,415 INFO L87 Difference]: Start difference. First operand 233 states and 236 transitions. Second operand has 116 states, 116 states have (on average 3.3448275862068964) internal successors, (388), 116 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:44,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:13:44,480 INFO L93 Difference]: Finished difference Result 536 states and 614 transitions. [2023-11-06 22:13:44,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-06 22:13:44,481 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.3448275862068964) internal successors, (388), 116 states have internal predecessors, (388), 0 states have call successors, (0), 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 232 [2023-11-06 22:13:44,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:13:44,483 INFO L225 Difference]: With dead ends: 536 [2023-11-06 22:13:44,483 INFO L226 Difference]: Without dead ends: 383 [2023-11-06 22:13:44,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 353 SyntacticMatches, 72 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8707 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=5820, Invalid=17436, Unknown=0, NotChecked=0, Total=23256 [2023-11-06 22:13:44,485 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 588 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:13:44,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 871 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:13:44,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-11-06 22:13:44,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 235. [2023-11-06 22:13:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.017094017094017) internal successors, (238), 234 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:44,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 238 transitions. [2023-11-06 22:13:44,514 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 238 transitions. Word has length 232 [2023-11-06 22:13:44,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:13:44,514 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 238 transitions. [2023-11-06 22:13:44,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.3448275862068964) internal successors, (388), 116 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:44,514 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 238 transitions. [2023-11-06 22:13:44,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-11-06 22:13:44,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:13:44,515 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:44,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:44,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:44,716 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:13:44,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:44,716 INFO L85 PathProgramCache]: Analyzing trace with hash -662137200, now seen corresponding path program 44 times [2023-11-06 22:13:44,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:44,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501880733] [2023-11-06 22:13:44,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:44,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 2630 proven. 1514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:47,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:47,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501880733] [2023-11-06 22:13:47,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501880733] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:47,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639886627] [2023-11-06 22:13:47,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:13:47,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:47,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:47,903 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:47,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-06 22:13:48,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:13:48,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:48,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-06 22:13:48,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 2738 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:51,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:13:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 2738 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:53,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639886627] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:13:53,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:13:53,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 118 [2023-11-06 22:13:53,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409395937] [2023-11-06 22:13:53,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:13:53,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2023-11-06 22:13:53,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:53,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2023-11-06 22:13:53,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3123, Invalid=10683, Unknown=0, NotChecked=0, Total=13806 [2023-11-06 22:13:53,296 INFO L87 Difference]: Start difference. First operand 235 states and 238 transitions. Second operand has 118 states, 118 states have (on average 3.305084745762712) internal successors, (390), 118 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:55,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:13:55,469 INFO L93 Difference]: Finished difference Result 544 states and 624 transitions. [2023-11-06 22:13:55,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-06 22:13:55,470 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.305084745762712) internal successors, (390), 118 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2023-11-06 22:13:55,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:13:55,472 INFO L225 Difference]: With dead ends: 544 [2023-11-06 22:13:55,472 INFO L226 Difference]: Without dead ends: 389 [2023-11-06 22:13:55,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 354 SyntacticMatches, 74 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9020 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=6089, Invalid=18091, Unknown=0, NotChecked=0, Total=24180 [2023-11-06 22:13:55,476 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 662 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:13:55,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 890 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:13:55,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-11-06 22:13:55,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 237. [2023-11-06 22:13:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.0169491525423728) internal successors, (240), 236 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 240 transitions. [2023-11-06 22:13:55,522 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 240 transitions. Word has length 234 [2023-11-06 22:13:55,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:13:55,522 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 240 transitions. [2023-11-06 22:13:55,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.305084745762712) internal successors, (390), 118 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:13:55,523 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 240 transitions. [2023-11-06 22:13:55,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2023-11-06 22:13:55,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:13:55,525 INFO L195 NwaCegarLoop]: trace histogram [39, 38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:55,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-06 22:13:55,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-06 22:13:55,731 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:13:55,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:55,732 INFO L85 PathProgramCache]: Analyzing trace with hash 162156789, now seen corresponding path program 45 times [2023-11-06 22:13:55,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:55,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602062447] [2023-11-06 22:13:55,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:55,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4220 backedges. 1406 proven. 2814 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:57,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:57,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602062447] [2023-11-06 22:13:57,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602062447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:13:57,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847519793] [2023-11-06 22:13:57,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:13:57,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:13:57,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:13:57,681 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:13:57,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-06 22:13:57,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2023-11-06 22:13:57,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:13:57,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-06 22:13:57,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:13:58,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4220 backedges. 1482 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:58,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4220 backedges. 1482 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:00,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847519793] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:00,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:14:00,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 45 [2023-11-06 22:14:00,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611070694] [2023-11-06 22:14:00,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:00,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-06 22:14:00,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:00,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-06 22:14:00,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=1110, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 22:14:00,038 INFO L87 Difference]: Start difference. First operand 237 states and 240 transitions. Second operand has 45 states, 45 states have (on average 5.7555555555555555) internal successors, (259), 45 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:00,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:14:00,907 INFO L93 Difference]: Finished difference Result 254 states and 258 transitions. [2023-11-06 22:14:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-06 22:14:00,907 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 5.7555555555555555) internal successors, (259), 45 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2023-11-06 22:14:00,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:14:00,909 INFO L225 Difference]: With dead ends: 254 [2023-11-06 22:14:00,909 INFO L226 Difference]: Without dead ends: 252 [2023-11-06 22:14:00,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 431 SyntacticMatches, 75 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3445 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2629, Invalid=4511, Unknown=0, NotChecked=0, Total=7140 [2023-11-06 22:14:00,910 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 89 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:14:00,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 339 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:14:00,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-06 22:14:00,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 245. [2023-11-06 22:14:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0163934426229508) internal successors, (248), 244 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 248 transitions. [2023-11-06 22:14:00,962 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 248 transitions. Word has length 236 [2023-11-06 22:14:00,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:14:00,962 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 248 transitions. [2023-11-06 22:14:00,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.7555555555555555) internal successors, (259), 45 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:00,963 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 248 transitions. [2023-11-06 22:14:00,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-11-06 22:14:00,964 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:14:00,965 INFO L195 NwaCegarLoop]: trace histogram [40, 39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:00,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:01,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-06 22:14:01,172 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:14:01,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:01,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1314595365, now seen corresponding path program 46 times [2023-11-06 22:14:01,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:01,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070091943] [2023-11-06 22:14:01,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:01,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 2928 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:04,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:04,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070091943] [2023-11-06 22:14:04,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070091943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:04,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251760172] [2023-11-06 22:14:04,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:14:04,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:04,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:04,640 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:04,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-06 22:14:04,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:14:04,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:14:04,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-06 22:14:04,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 3042 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:08,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 3042 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:10,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251760172] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:10,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:14:10,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 125 [2023-11-06 22:14:10,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661593351] [2023-11-06 22:14:10,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:10,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2023-11-06 22:14:10,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:10,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2023-11-06 22:14:10,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3530, Invalid=11970, Unknown=0, NotChecked=0, Total=15500 [2023-11-06 22:14:10,481 INFO L87 Difference]: Start difference. First operand 245 states and 248 transitions. Second operand has 125 states, 125 states have (on average 3.336) internal successors, (417), 125 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:14,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:14:14,334 INFO L93 Difference]: Finished difference Result 727 states and 812 transitions. [2023-11-06 22:14:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2023-11-06 22:14:14,334 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 3.336) internal successors, (417), 125 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2023-11-06 22:14:14,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:14:14,337 INFO L225 Difference]: With dead ends: 727 [2023-11-06 22:14:14,337 INFO L226 Difference]: Without dead ends: 409 [2023-11-06 22:14:14,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 369 SyntacticMatches, 75 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13864 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=10049, Invalid=31363, Unknown=0, NotChecked=0, Total=41412 [2023-11-06 22:14:14,341 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 730 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:14:14,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 1266 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:14:14,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2023-11-06 22:14:14,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 249. [2023-11-06 22:14:14,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0161290322580645) internal successors, (252), 248 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 252 transitions. [2023-11-06 22:14:14,373 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 252 transitions. Word has length 244 [2023-11-06 22:14:14,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:14:14,373 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 252 transitions. [2023-11-06 22:14:14,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 3.336) internal successors, (417), 125 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:14,374 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 252 transitions. [2023-11-06 22:14:14,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-11-06 22:14:14,374 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:14:14,375 INFO L195 NwaCegarLoop]: trace histogram [41, 40, 40, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:14,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-11-06 22:14:14,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:14,575 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:14:14,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:14,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1772939493, now seen corresponding path program 47 times [2023-11-06 22:14:14,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:14,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917982621] [2023-11-06 22:14:14,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:14,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4682 backedges. 1560 proven. 3122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:16,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:16,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917982621] [2023-11-06 22:14:16,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917982621] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:16,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544336859] [2023-11-06 22:14:16,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:14:16,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:16,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:16,724 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:16,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-06 22:14:17,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2023-11-06 22:14:17,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:14:17,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 86 conjunts are in the unsatisfiable core [2023-11-06 22:14:17,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:14:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4682 backedges. 1640 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:17,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:14:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4682 backedges. 1640 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:19,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544336859] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:14:19,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:14:19,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 47 [2023-11-06 22:14:19,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184905085] [2023-11-06 22:14:19,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:14:19,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-06 22:14:19,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:14:19,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-06 22:14:19,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=955, Invalid=1207, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 22:14:19,045 INFO L87 Difference]: Start difference. First operand 249 states and 252 transitions. Second operand has 47 states, 47 states have (on average 5.76595744680851) internal successors, (271), 47 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:19,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:14:19,942 INFO L93 Difference]: Finished difference Result 266 states and 270 transitions. [2023-11-06 22:14:19,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-11-06 22:14:19,943 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 5.76595744680851) internal successors, (271), 47 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2023-11-06 22:14:19,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:14:19,945 INFO L225 Difference]: With dead ends: 266 [2023-11-06 22:14:19,945 INFO L226 Difference]: Without dead ends: 264 [2023-11-06 22:14:19,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 453 SyntacticMatches, 79 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3787 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2886, Invalid=4946, Unknown=0, NotChecked=0, Total=7832 [2023-11-06 22:14:19,946 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 93 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:14:19,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 366 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:14:19,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-11-06 22:14:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 257. [2023-11-06 22:14:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.015625) internal successors, (260), 256 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 260 transitions. [2023-11-06 22:14:19,978 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 260 transitions. Word has length 248 [2023-11-06 22:14:19,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:14:19,979 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 260 transitions. [2023-11-06 22:14:19,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 5.76595744680851) internal successors, (271), 47 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:14:19,979 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 260 transitions. [2023-11-06 22:14:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-11-06 22:14:19,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:14:19,980 INFO L195 NwaCegarLoop]: trace histogram [42, 41, 41, 41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:14:19,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-06 22:14:20,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-06 22:14:20,181 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:14:20,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:14:20,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1296598475, now seen corresponding path program 48 times [2023-11-06 22:14:20,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:14:20,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313903569] [2023-11-06 22:14:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:14:20,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:14:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:14:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5002 backedges. 3242 proven. 1760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:14:23,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:14:23,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313903569] [2023-11-06 22:14:23,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313903569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:14:23,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361106405] [2023-11-06 22:14:23,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:14:23,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:14:23,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:14:23,905 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:14:23,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c825222-a9b3-4f02-89d9-98670acfc002/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-06 22:14:24,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2023-11-06 22:14:24,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:14:24,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 85 conjunts are in the unsatisfiable core [2023-11-06 22:14:24,214 INFO L285 TraceCheckSpWp]: Computing forward predicates...