./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add-1.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_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/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_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/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_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/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 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:09:48,822 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:09:48,920 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:09:48,927 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:09:48,928 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:09:48,956 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:09:48,957 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:09:48,957 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:09:48,958 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:09:48,959 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:09:48,960 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:09:48,961 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:09:48,961 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:09:48,962 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:09:48,963 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:09:48,964 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:09:48,964 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:09:48,965 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:09:48,965 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:09:48,966 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:09:48,966 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:09:48,967 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:09:48,968 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:09:48,968 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:09:48,969 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:09:48,969 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:09:48,970 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:09:48,970 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:09:48,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:09:48,972 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:09:48,972 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:09:48,973 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:09:48,973 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:09:48,973 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:09:48,974 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:09:48,974 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:09:48,974 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:09:48,975 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:09:48,975 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:09:48,975 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_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 [2023-11-06 23:09:49,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:09:49,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:09:49,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:09:49,306 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:09:49,306 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:09:49,308 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/bitvector/byte_add-1.i [2023-11-06 23:09:52,620 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:09:52,841 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:09:52,842 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/sv-benchmarks/c/bitvector/byte_add-1.i [2023-11-06 23:09:52,855 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/data/ae0c024dd/173267f2f6f14ebc82ca63a23b295af3/FLAG02ff6d5ec [2023-11-06 23:09:52,886 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/data/ae0c024dd/173267f2f6f14ebc82ca63a23b295af3 [2023-11-06 23:09:52,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:09:52,902 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:09:52,906 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:09:52,906 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:09:52,914 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:09:52,915 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:09:52" (1/1) ... [2023-11-06 23:09:52,917 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe5eafa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:52, skipping insertion in model container [2023-11-06 23:09:52,917 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:09:52" (1/1) ... [2023-11-06 23:09:52,967 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:09:53,179 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_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/sv-benchmarks/c/bitvector/byte_add-1.i[1166,1179] [2023-11-06 23:09:53,263 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:09:53,280 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:09:53,300 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_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/sv-benchmarks/c/bitvector/byte_add-1.i[1166,1179] [2023-11-06 23:09:53,344 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:09:53,365 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:09:53,366 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:53 WrapperNode [2023-11-06 23:09:53,366 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:09:53,368 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:09:53,369 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:09:53,369 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:09:53,377 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:53" (1/1) ... [2023-11-06 23:09:53,406 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:53" (1/1) ... [2023-11-06 23:09:53,439 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 153 [2023-11-06 23:09:53,440 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:09:53,440 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:09:53,441 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:09:53,441 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:09:53,452 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:53" (1/1) ... [2023-11-06 23:09:53,453 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:53" (1/1) ... [2023-11-06 23:09:53,456 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:53" (1/1) ... [2023-11-06 23:09:53,456 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:53" (1/1) ... [2023-11-06 23:09:53,466 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:53" (1/1) ... [2023-11-06 23:09:53,472 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:53" (1/1) ... [2023-11-06 23:09:53,476 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:53" (1/1) ... [2023-11-06 23:09:53,479 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:53" (1/1) ... [2023-11-06 23:09:53,484 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:09:53,485 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:09:53,485 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:09:53,485 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:09:53,486 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:53" (1/1) ... [2023-11-06 23:09:53,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:09:53,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:53,565 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:09:53,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:09:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:09:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:09:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:09:53,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:09:53,714 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:09:53,716 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:09:54,226 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:09:54,241 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:09:54,242 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 23:09:54,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:09:54 BoogieIcfgContainer [2023-11-06 23:09:54,246 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:09:54,249 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:09:54,250 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:09:54,255 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:09:54,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:09:52" (1/3) ... [2023-11-06 23:09:54,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318598ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:09:54, skipping insertion in model container [2023-11-06 23:09:54,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:53" (2/3) ... [2023-11-06 23:09:54,261 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318598ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:09:54, skipping insertion in model container [2023-11-06 23:09:54,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:09:54" (3/3) ... [2023-11-06 23:09:54,265 INFO L112 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2023-11-06 23:09:54,301 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:09:54,301 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:09:54,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:09:54,359 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;@2eb147d6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:09:54,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:09:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 47 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 23:09:54,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:54,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:54,388 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:54,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:54,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1456424742, now seen corresponding path program 1 times [2023-11-06 23:09:54,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:54,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095115704] [2023-11-06 23:09:54,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:54,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:54,652 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 23:09:54,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:54,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095115704] [2023-11-06 23:09:54,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095115704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:54,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:54,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:09:54,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274024042] [2023-11-06 23:09:54,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:54,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:09:54,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:54,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:09:54,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:09:54,719 INFO L87 Difference]: Start difference. First operand has 48 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 47 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:54,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:54,750 INFO L93 Difference]: Finished difference Result 69 states and 116 transitions. [2023-11-06 23:09:54,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:09:54,753 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-06 23:09:54,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:54,763 INFO L225 Difference]: With dead ends: 69 [2023-11-06 23:09:54,763 INFO L226 Difference]: Without dead ends: 44 [2023-11-06 23:09:54,766 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 23:09:54,774 INFO L413 NwaCegarLoop]: 80 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, 80 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 23:09:54,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:09:54,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-06 23:09:54,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-06 23:09:54,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:54,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 76 transitions. [2023-11-06 23:09:54,816 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 76 transitions. Word has length 15 [2023-11-06 23:09:54,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:54,817 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 76 transitions. [2023-11-06 23:09:54,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:54,817 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 76 transitions. [2023-11-06 23:09:54,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 23:09:54,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:54,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:54,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:09:54,819 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:54,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:54,820 INFO L85 PathProgramCache]: Analyzing trace with hash -548834760, now seen corresponding path program 1 times [2023-11-06 23:09:54,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:54,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728708043] [2023-11-06 23:09:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:54,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:55,076 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 23:09:55,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:55,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728708043] [2023-11-06 23:09:55,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728708043] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:55,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:55,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:55,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336912051] [2023-11-06 23:09:55,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:55,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:55,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:55,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:55,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:55,084 INFO L87 Difference]: Start difference. First operand 44 states and 76 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:55,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:55,301 INFO L93 Difference]: Finished difference Result 101 states and 180 transitions. [2023-11-06 23:09:55,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:55,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-06 23:09:55,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:55,307 INFO L225 Difference]: With dead ends: 101 [2023-11-06 23:09:55,307 INFO L226 Difference]: Without dead ends: 67 [2023-11-06 23:09:55,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:55,315 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 24 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:55,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 82 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:09:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-06 23:09:55,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2023-11-06 23:09:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.578125) internal successors, (101), 64 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 101 transitions. [2023-11-06 23:09:55,331 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 101 transitions. Word has length 15 [2023-11-06 23:09:55,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:55,331 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 101 transitions. [2023-11-06 23:09:55,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:55,332 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 101 transitions. [2023-11-06 23:09:55,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 23:09:55,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:55,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:55,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:09:55,336 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:55,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:55,338 INFO L85 PathProgramCache]: Analyzing trace with hash 427733795, now seen corresponding path program 1 times [2023-11-06 23:09:55,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:55,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810252887] [2023-11-06 23:09:55,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:55,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:55,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:55,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810252887] [2023-11-06 23:09:55,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810252887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:55,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:55,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:09:55,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24179676] [2023-11-06 23:09:55,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:55,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:55,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:55,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:55,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:09:55,524 INFO L87 Difference]: Start difference. First operand 65 states and 101 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:55,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:55,833 INFO L93 Difference]: Finished difference Result 158 states and 273 transitions. [2023-11-06 23:09:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:09:55,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-06 23:09:55,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:55,835 INFO L225 Difference]: With dead ends: 158 [2023-11-06 23:09:55,835 INFO L226 Difference]: Without dead ends: 124 [2023-11-06 23:09:55,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 23:09:55,838 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 92 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:55,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 107 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:09:55,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-06 23:09:55,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 88. [2023-11-06 23:09:55,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.5632183908045978) internal successors, (136), 87 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 136 transitions. [2023-11-06 23:09:55,852 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 136 transitions. Word has length 21 [2023-11-06 23:09:55,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:55,852 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 136 transitions. [2023-11-06 23:09:55,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:55,853 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 136 transitions. [2023-11-06 23:09:55,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 23:09:55,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:55,855 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:55,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:09:55,855 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:55,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:55,856 INFO L85 PathProgramCache]: Analyzing trace with hash 62855698, now seen corresponding path program 1 times [2023-11-06 23:09:55,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:55,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735342989] [2023-11-06 23:09:55,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:55,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 23:09:56,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:56,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735342989] [2023-11-06 23:09:56,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735342989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:56,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:56,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:09:56,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81858121] [2023-11-06 23:09:56,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:56,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:56,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:56,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:56,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:09:56,048 INFO L87 Difference]: Start difference. First operand 88 states and 136 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:56,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:56,269 INFO L93 Difference]: Finished difference Result 251 states and 384 transitions. [2023-11-06 23:09:56,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:09:56,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-06 23:09:56,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:56,275 INFO L225 Difference]: With dead ends: 251 [2023-11-06 23:09:56,275 INFO L226 Difference]: Without dead ends: 176 [2023-11-06 23:09:56,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 23:09:56,288 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 95 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:56,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 209 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:09:56,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-11-06 23:09:56,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 96. [2023-11-06 23:09:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.5263157894736843) internal successors, (145), 95 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:56,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 145 transitions. [2023-11-06 23:09:56,318 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 145 transitions. Word has length 27 [2023-11-06 23:09:56,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:56,318 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 145 transitions. [2023-11-06 23:09:56,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 145 transitions. [2023-11-06 23:09:56,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 23:09:56,323 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:56,324 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:56,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:09:56,324 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:56,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash -333506399, now seen corresponding path program 1 times [2023-11-06 23:09:56,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:56,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516612301] [2023-11-06 23:09:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:56,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 23:09:56,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:56,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516612301] [2023-11-06 23:09:56,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516612301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:56,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:56,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:09:56,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928970811] [2023-11-06 23:09:56,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:56,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:56,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:56,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:56,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:09:56,571 INFO L87 Difference]: Start difference. First operand 96 states and 145 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:56,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:56,780 INFO L93 Difference]: Finished difference Result 272 states and 410 transitions. [2023-11-06 23:09:56,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:09:56,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-06 23:09:56,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:56,783 INFO L225 Difference]: With dead ends: 272 [2023-11-06 23:09:56,784 INFO L226 Difference]: Without dead ends: 196 [2023-11-06 23:09:56,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 23:09:56,787 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 99 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:56,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 217 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:09:56,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-06 23:09:56,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 106. [2023-11-06 23:09:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.5047619047619047) internal successors, (158), 105 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:56,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 158 transitions. [2023-11-06 23:09:56,820 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 158 transitions. Word has length 28 [2023-11-06 23:09:56,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:56,821 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 158 transitions. [2023-11-06 23:09:56,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:56,821 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 158 transitions. [2023-11-06 23:09:56,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 23:09:56,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:56,828 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:56,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:09:56,829 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:56,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:56,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1267017571, now seen corresponding path program 1 times [2023-11-06 23:09:56,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:56,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084474337] [2023-11-06 23:09:56,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:56,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:57,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:57,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084474337] [2023-11-06 23:09:57,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084474337] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:57,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489932577] [2023-11-06 23:09:57,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:57,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:57,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:57,025 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:57,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:09:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:57,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:09:57,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:09:57,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:57,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489932577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:57,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:09:57,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-11-06 23:09:57,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611601666] [2023-11-06 23:09:57,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:57,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:57,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:57,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:57,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:09:57,231 INFO L87 Difference]: Start difference. First operand 106 states and 158 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 23:09:57,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:57,495 INFO L93 Difference]: Finished difference Result 224 states and 357 transitions. [2023-11-06 23:09:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:09:57,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-06 23:09:57,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:57,497 INFO L225 Difference]: With dead ends: 224 [2023-11-06 23:09:57,497 INFO L226 Difference]: Without dead ends: 151 [2023-11-06 23:09:57,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:09:57,499 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 37 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:57,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 142 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:09:57,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-06 23:09:57,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 135. [2023-11-06 23:09:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.4402985074626866) internal successors, (193), 134 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 193 transitions. [2023-11-06 23:09:57,521 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 193 transitions. Word has length 29 [2023-11-06 23:09:57,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:57,522 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 193 transitions. [2023-11-06 23:09:57,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 23:09:57,522 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 193 transitions. [2023-11-06 23:09:57,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-06 23:09:57,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:57,523 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:57,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:57,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:09:57,731 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:57,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:57,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1958263922, now seen corresponding path program 1 times [2023-11-06 23:09:57,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:57,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020967605] [2023-11-06 23:09:57,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:57,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:57,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:57,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020967605] [2023-11-06 23:09:57,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020967605] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:57,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142774118] [2023-11-06 23:09:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:57,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:57,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:57,914 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:57,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:09:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:58,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:09:58,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 23:09:58,082 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:58,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142774118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:58,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:09:58,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-11-06 23:09:58,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080825424] [2023-11-06 23:09:58,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:58,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:09:58,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:58,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:09:58,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:09:58,085 INFO L87 Difference]: Start difference. First operand 135 states and 193 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 23:09:58,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:58,427 INFO L93 Difference]: Finished difference Result 530 states and 776 transitions. [2023-11-06 23:09:58,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:09:58,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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) Word has length 35 [2023-11-06 23:09:58,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:58,430 INFO L225 Difference]: With dead ends: 530 [2023-11-06 23:09:58,431 INFO L226 Difference]: Without dead ends: 400 [2023-11-06 23:09:58,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:09:58,432 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 179 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:58,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 371 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:09:58,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-11-06 23:09:58,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 305. [2023-11-06 23:09:58,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.4078947368421053) internal successors, (428), 304 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:58,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 428 transitions. [2023-11-06 23:09:58,458 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 428 transitions. Word has length 35 [2023-11-06 23:09:58,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:58,458 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 428 transitions. [2023-11-06 23:09:58,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 23:09:58,458 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 428 transitions. [2023-11-06 23:09:58,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-06 23:09:58,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:58,460 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:58,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:58,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:58,667 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:58,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:58,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2050511854, now seen corresponding path program 1 times [2023-11-06 23:09:58,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:58,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236818806] [2023-11-06 23:09:58,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:58,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:58,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:58,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236818806] [2023-11-06 23:09:58,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236818806] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:58,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490778295] [2023-11-06 23:09:58,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:58,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:58,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:58,851 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:58,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:09:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:58,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:09:58,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-06 23:09:58,980 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:58,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490778295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:58,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:09:58,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2023-11-06 23:09:58,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479081843] [2023-11-06 23:09:58,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:58,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:58,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:58,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:58,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:09:58,983 INFO L87 Difference]: Start difference. First operand 305 states and 428 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:59,202 INFO L93 Difference]: Finished difference Result 712 states and 1036 transitions. [2023-11-06 23:09:59,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:09:59,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-06 23:09:59,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:59,206 INFO L225 Difference]: With dead ends: 712 [2023-11-06 23:09:59,206 INFO L226 Difference]: Without dead ends: 435 [2023-11-06 23:09:59,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:09:59,208 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 36 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:59,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 142 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:09:59,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2023-11-06 23:09:59,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 363. [2023-11-06 23:09:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.3756906077348066) internal successors, (498), 362 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:59,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 498 transitions. [2023-11-06 23:09:59,226 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 498 transitions. Word has length 36 [2023-11-06 23:09:59,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:59,227 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 498 transitions. [2023-11-06 23:09:59,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:59,227 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 498 transitions. [2023-11-06 23:09:59,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-06 23:09:59,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:59,229 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:59,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:59,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 23:09:59,437 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:59,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:59,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1389376447, now seen corresponding path program 1 times [2023-11-06 23:09:59,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:59,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818570818] [2023-11-06 23:09:59,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:59,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-06 23:09:59,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:59,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818570818] [2023-11-06 23:09:59,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818570818] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:59,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:59,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:09:59,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820230108] [2023-11-06 23:09:59,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:59,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:09:59,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:59,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:09:59,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:09:59,610 INFO L87 Difference]: Start difference. First operand 363 states and 498 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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 23:10:00,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:00,031 INFO L93 Difference]: Finished difference Result 1443 states and 1961 transitions. [2023-11-06 23:10:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:10:00,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-06 23:10:00,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:00,039 INFO L225 Difference]: With dead ends: 1443 [2023-11-06 23:10:00,039 INFO L226 Difference]: Without dead ends: 1114 [2023-11-06 23:10:00,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:10:00,043 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 201 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:00,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 419 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:10:00,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2023-11-06 23:10:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 363. [2023-11-06 23:10:00,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.3756906077348066) internal successors, (498), 362 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:00,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 498 transitions. [2023-11-06 23:10:00,083 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 498 transitions. Word has length 42 [2023-11-06 23:10:00,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:00,084 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 498 transitions. [2023-11-06 23:10:00,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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 23:10:00,084 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 498 transitions. [2023-11-06 23:10:00,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-06 23:10:00,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:00,086 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:00,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 23:10:00,087 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:00,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:00,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1473949816, now seen corresponding path program 1 times [2023-11-06 23:10:00,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:00,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612484495] [2023-11-06 23:10:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:00,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-06 23:10:00,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:00,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612484495] [2023-11-06 23:10:00,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612484495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:00,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:00,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:10:00,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172850550] [2023-11-06 23:10:00,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:00,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:10:00,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:00,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:10:00,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:10:00,315 INFO L87 Difference]: Start difference. First operand 363 states and 498 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:00,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:00,870 INFO L93 Difference]: Finished difference Result 755 states and 1030 transitions. [2023-11-06 23:10:00,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:10:00,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-06 23:10:00,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:00,874 INFO L225 Difference]: With dead ends: 755 [2023-11-06 23:10:00,875 INFO L226 Difference]: Without dead ends: 619 [2023-11-06 23:10:00,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:10:00,876 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 287 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:00,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 648 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:10:00,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2023-11-06 23:10:00,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 374. [2023-11-06 23:10:00,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 1.3672922252010724) internal successors, (510), 373 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:00,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 510 transitions. [2023-11-06 23:10:00,909 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 510 transitions. Word has length 43 [2023-11-06 23:10:00,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:00,909 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 510 transitions. [2023-11-06 23:10:00,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:00,910 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 510 transitions. [2023-11-06 23:10:00,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-06 23:10:00,911 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:00,911 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:00,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 23:10:00,911 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:00,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:00,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1977011978, now seen corresponding path program 1 times [2023-11-06 23:10:00,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:00,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535332043] [2023-11-06 23:10:00,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:00,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-06 23:10:01,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:01,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535332043] [2023-11-06 23:10:01,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535332043] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:01,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:01,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 23:10:01,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829710467] [2023-11-06 23:10:01,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:01,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:10:01,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:01,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:10:01,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:10:01,122 INFO L87 Difference]: Start difference. First operand 374 states and 510 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:01,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:01,869 INFO L93 Difference]: Finished difference Result 1898 states and 2552 transitions. [2023-11-06 23:10:01,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:10:01,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-06 23:10:01,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:01,879 INFO L225 Difference]: With dead ends: 1898 [2023-11-06 23:10:01,879 INFO L226 Difference]: Without dead ends: 1568 [2023-11-06 23:10:01,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:10:01,881 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 407 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:01,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 862 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:10:01,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2023-11-06 23:10:01,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 356. [2023-11-06 23:10:01,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.3633802816901408) internal successors, (484), 355 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:01,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 484 transitions. [2023-11-06 23:10:01,932 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 484 transitions. Word has length 43 [2023-11-06 23:10:01,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:01,933 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 484 transitions. [2023-11-06 23:10:01,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:01,935 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 484 transitions. [2023-11-06 23:10:01,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-06 23:10:01,937 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:01,937 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:01,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 23:10:01,937 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:01,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:01,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1746661041, now seen corresponding path program 1 times [2023-11-06 23:10:01,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:01,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770468040] [2023-11-06 23:10:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:01,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 23:10:02,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:02,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770468040] [2023-11-06 23:10:02,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770468040] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:02,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:02,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:10:02,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865624731] [2023-11-06 23:10:02,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:02,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:02,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:02,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:02,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:10:02,039 INFO L87 Difference]: Start difference. First operand 356 states and 484 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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 23:10:02,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:02,097 INFO L93 Difference]: Finished difference Result 497 states and 662 transitions. [2023-11-06 23:10:02,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:02,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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 48 [2023-11-06 23:10:02,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:02,100 INFO L225 Difference]: With dead ends: 497 [2023-11-06 23:10:02,101 INFO L226 Difference]: Without dead ends: 453 [2023-11-06 23:10:02,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:10:02,102 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 4 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:02,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 146 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:10:02,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2023-11-06 23:10:02,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 441. [2023-11-06 23:10:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 1.325) internal successors, (583), 440 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 583 transitions. [2023-11-06 23:10:02,159 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 583 transitions. Word has length 48 [2023-11-06 23:10:02,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:02,161 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 583 transitions. [2023-11-06 23:10:02,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 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 23:10:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 583 transitions. [2023-11-06 23:10:02,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-06 23:10:02,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:02,163 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:02,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 23:10:02,164 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:02,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:02,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1674274483, now seen corresponding path program 1 times [2023-11-06 23:10:02,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:02,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422863437] [2023-11-06 23:10:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:02,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-06 23:10:02,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:02,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422863437] [2023-11-06 23:10:02,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422863437] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:02,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911733279] [2023-11-06 23:10:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:02,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:02,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:02,387 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:02,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:10:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:02,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:10:02,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 23:10:02,533 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:10:02,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911733279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:02,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:10:02,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2023-11-06 23:10:02,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219596198] [2023-11-06 23:10:02,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:02,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:10:02,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:02,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:10:02,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:10:02,540 INFO L87 Difference]: Start difference. First operand 441 states and 583 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:02,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:02,768 INFO L93 Difference]: Finished difference Result 1414 states and 1880 transitions. [2023-11-06 23:10:02,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:10:02,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-11-06 23:10:02,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:02,774 INFO L225 Difference]: With dead ends: 1414 [2023-11-06 23:10:02,774 INFO L226 Difference]: Without dead ends: 916 [2023-11-06 23:10:02,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:10:02,776 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 64 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:02,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 176 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:10:02,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2023-11-06 23:10:02,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 818. [2023-11-06 23:10:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 1.303549571603427) internal successors, (1065), 817 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1065 transitions. [2023-11-06 23:10:02,866 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1065 transitions. Word has length 48 [2023-11-06 23:10:02,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:02,866 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 1065 transitions. [2023-11-06 23:10:02,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:02,867 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1065 transitions. [2023-11-06 23:10:02,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-06 23:10:02,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:02,869 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:02,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:03,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:10:03,081 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:03,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:03,082 INFO L85 PathProgramCache]: Analyzing trace with hash -41385867, now seen corresponding path program 1 times [2023-11-06 23:10:03,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:03,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787297390] [2023-11-06 23:10:03,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:03,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:03,311 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-06 23:10:03,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:03,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787297390] [2023-11-06 23:10:03,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787297390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:03,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16869949] [2023-11-06 23:10:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:03,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:03,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:03,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:03,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:10:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:03,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:10:03,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:03,528 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 23:10:03,529 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:10:03,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16869949] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:03,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:10:03,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2023-11-06 23:10:03,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570353681] [2023-11-06 23:10:03,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:03,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:10:03,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:03,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:10:03,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:10:03,532 INFO L87 Difference]: Start difference. First operand 818 states and 1065 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:03,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:03,997 INFO L93 Difference]: Finished difference Result 1904 states and 2506 transitions. [2023-11-06 23:10:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:10:03,998 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-06 23:10:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:04,006 INFO L225 Difference]: With dead ends: 1904 [2023-11-06 23:10:04,006 INFO L226 Difference]: Without dead ends: 1436 [2023-11-06 23:10:04,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:10:04,008 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 177 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:04,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 354 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:10:04,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2023-11-06 23:10:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1079. [2023-11-06 23:10:04,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 1.2959183673469388) internal successors, (1397), 1078 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:04,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1397 transitions. [2023-11-06 23:10:04,108 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1397 transitions. Word has length 49 [2023-11-06 23:10:04,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:04,109 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 1397 transitions. [2023-11-06 23:10:04,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:04,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1397 transitions. [2023-11-06 23:10:04,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-06 23:10:04,112 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:04,112 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:04,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 23:10:04,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:10:04,318 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:04,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:04,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1124745122, now seen corresponding path program 1 times [2023-11-06 23:10:04,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:04,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318999383] [2023-11-06 23:10:04,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:04,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 23:10:04,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:04,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318999383] [2023-11-06 23:10:04,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318999383] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:04,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:04,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 23:10:04,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147186363] [2023-11-06 23:10:04,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:04,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:10:04,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:04,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:10:04,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:10:04,553 INFO L87 Difference]: Start difference. First operand 1079 states and 1397 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:05,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:05,328 INFO L93 Difference]: Finished difference Result 2306 states and 2965 transitions. [2023-11-06 23:10:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:10:05,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-06 23:10:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:05,339 INFO L225 Difference]: With dead ends: 2306 [2023-11-06 23:10:05,339 INFO L226 Difference]: Without dead ends: 1895 [2023-11-06 23:10:05,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:10:05,341 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 351 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:05,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 775 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:10:05,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2023-11-06 23:10:05,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1067. [2023-11-06 23:10:05,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 1.299249530956848) internal successors, (1385), 1066 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:05,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1385 transitions. [2023-11-06 23:10:05,436 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1385 transitions. Word has length 50 [2023-11-06 23:10:05,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:05,436 INFO L495 AbstractCegarLoop]: Abstraction has 1067 states and 1385 transitions. [2023-11-06 23:10:05,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:05,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1385 transitions. [2023-11-06 23:10:05,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 23:10:05,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:05,439 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:05,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 23:10:05,439 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:05,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:05,440 INFO L85 PathProgramCache]: Analyzing trace with hash 928030504, now seen corresponding path program 1 times [2023-11-06 23:10:05,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:05,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744281576] [2023-11-06 23:10:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:05,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-06 23:10:05,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:05,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744281576] [2023-11-06 23:10:05,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744281576] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:05,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127231869] [2023-11-06 23:10:05,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:05,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:05,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:05,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:05,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:10:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:05,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 23:10:05,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 23:10:05,871 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:10:05,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127231869] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:05,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:10:05,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2023-11-06 23:10:05,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287223813] [2023-11-06 23:10:05,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:05,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:10:05,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:05,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:10:05,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:10:05,874 INFO L87 Difference]: Start difference. First operand 1067 states and 1385 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:07,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:07,224 INFO L93 Difference]: Finished difference Result 2560 states and 3342 transitions. [2023-11-06 23:10:07,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 23:10:07,225 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-06 23:10:07,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:07,238 INFO L225 Difference]: With dead ends: 2560 [2023-11-06 23:10:07,238 INFO L226 Difference]: Without dead ends: 2130 [2023-11-06 23:10:07,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2023-11-06 23:10:07,243 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 900 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:07,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 1477 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 23:10:07,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2023-11-06 23:10:07,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1433. [2023-11-06 23:10:07,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 1.2939944134078212) internal successors, (1853), 1432 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1853 transitions. [2023-11-06 23:10:07,398 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1853 transitions. Word has length 54 [2023-11-06 23:10:07,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:07,398 INFO L495 AbstractCegarLoop]: Abstraction has 1433 states and 1853 transitions. [2023-11-06 23:10:07,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:07,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1853 transitions. [2023-11-06 23:10:07,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 23:10:07,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:07,401 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:07,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:07,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:10:07,607 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:07,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:07,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1000242198, now seen corresponding path program 1 times [2023-11-06 23:10:07,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:07,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69897340] [2023-11-06 23:10:07,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:07,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 23:10:13,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:13,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69897340] [2023-11-06 23:10:13,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69897340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:13,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166872048] [2023-11-06 23:10:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:13,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:13,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:13,183 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:13,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef980f9c-e3ae-4b7a-bafc-f9a54303b083/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:10:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:14,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-06 23:10:14,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 23:12:05,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-06 23:12:52,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166872048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:52,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:52,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 22] total 61 [2023-11-06 23:12:52,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781718418] [2023-11-06 23:12:52,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:52,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-06 23:12:52,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:52,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-06 23:12:52,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=3181, Unknown=36, NotChecked=0, Total=3660 [2023-11-06 23:12:52,428 INFO L87 Difference]: Start difference. First operand 1433 states and 1853 transitions. Second operand has 61 states, 61 states have (on average 2.262295081967213) internal successors, (138), 61 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:13:12,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 23:13:14,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 23:13:17,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 23:13:21,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 23:13:22,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 23:13:24,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 23:13:48,815 WARN L293 SmtUtils]: Spent 6.49s on a formula simplification. DAG size of input: 77 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:13:50,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 23:13:53,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []