./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label07.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label07.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a8eb1c549e735c3cffa39c2cb57907d032185b5da86f8481f430bf75e1d2a903 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:10:56,902 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:10:57,009 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:10:57,017 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:10:57,018 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:10:57,057 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:10:57,058 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:10:57,059 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:10:57,059 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:10:57,060 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:10:57,063 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:10:57,063 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:10:57,064 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:10:57,068 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:10:57,069 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:10:57,069 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:10:57,070 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:10:57,071 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:10:57,072 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:10:57,072 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:10:57,072 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:10:57,073 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:10:57,073 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:10:57,073 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:10:57,074 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:10:57,075 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:10:57,075 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:10:57,075 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:10:57,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:10:57,076 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:10:57,077 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:10:57,078 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:10:57,078 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:10:57,078 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:10:57,078 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:10:57,078 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:10:57,079 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:10:57,079 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:10:57,079 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:10:57,079 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_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8eb1c549e735c3cffa39c2cb57907d032185b5da86f8481f430bf75e1d2a903 [2023-11-12 02:10:57,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:10:57,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:10:57,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:10:57,346 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:10:57,346 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:10:57,347 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/eca-rers2012/Problem03_label07.c [2023-11-12 02:11:00,571 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:11:01,031 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:11:01,032 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/sv-benchmarks/c/eca-rers2012/Problem03_label07.c [2023-11-12 02:11:01,057 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/data/01e5c61a0/fdd2e3a641bc479d9afc307326e3b6cf/FLAGb5bc54f4f [2023-11-12 02:11:01,076 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/data/01e5c61a0/fdd2e3a641bc479d9afc307326e3b6cf [2023-11-12 02:11:01,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:11:01,086 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:11:01,090 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:11:01,090 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:11:01,095 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:11:01,096 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:11:01" (1/1) ... [2023-11-12 02:11:01,097 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64dbf46c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:01, skipping insertion in model container [2023-11-12 02:11:01,098 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:11:01" (1/1) ... [2023-11-12 02:11:01,177 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:11:01,927 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_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/sv-benchmarks/c/eca-rers2012/Problem03_label07.c[57439,57452] [2023-11-12 02:11:01,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:11:02,005 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:11:02,259 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_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/sv-benchmarks/c/eca-rers2012/Problem03_label07.c[57439,57452] [2023-11-12 02:11:02,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:11:02,294 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:11:02,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:02 WrapperNode [2023-11-12 02:11:02,295 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:11:02,297 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:11:02,297 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:11:02,297 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:11:02,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:02" (1/1) ... [2023-11-12 02:11:02,344 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:02" (1/1) ... [2023-11-12 02:11:02,451 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-11-12 02:11:02,452 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:11:02,453 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:11:02,453 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:11:02,453 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:11:02,464 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:02" (1/1) ... [2023-11-12 02:11:02,464 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:02" (1/1) ... [2023-11-12 02:11:02,474 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:02" (1/1) ... [2023-11-12 02:11:02,474 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:02" (1/1) ... [2023-11-12 02:11:02,529 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:02" (1/1) ... [2023-11-12 02:11:02,552 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:02" (1/1) ... [2023-11-12 02:11:02,563 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:02" (1/1) ... [2023-11-12 02:11:02,576 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:02" (1/1) ... [2023-11-12 02:11:02,587 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:11:02,588 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:11:02,588 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:11:02,588 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:11:02,589 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:02" (1/1) ... [2023-11-12 02:11:02,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:11:02,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:02,619 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:11:02,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:11:02,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:11:02,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:11:02,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:11:02,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:11:02,841 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:11:02,842 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:11:05,073 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:11:05,091 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:11:05,092 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:11:05,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:11:05 BoogieIcfgContainer [2023-11-12 02:11:05,096 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:11:05,099 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:11:05,099 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:11:05,102 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:11:05,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:11:01" (1/3) ... [2023-11-12 02:11:05,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79bda1cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:11:05, skipping insertion in model container [2023-11-12 02:11:05,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:11:02" (2/3) ... [2023-11-12 02:11:05,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79bda1cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:11:05, skipping insertion in model container [2023-11-12 02:11:05,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:11:05" (3/3) ... [2023-11-12 02:11:05,109 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label07.c [2023-11-12 02:11:05,129 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:11:05,129 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:11:05,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:11:05,214 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6639f0f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:11:05,215 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:11:05,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:05,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-12 02:11:05,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:05,248 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, 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, 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, 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, 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] [2023-11-12 02:11:05,249 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:05,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:05,259 INFO L85 PathProgramCache]: Analyzing trace with hash -58959822, now seen corresponding path program 1 times [2023-11-12 02:11:05,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:05,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292740207] [2023-11-12 02:11:05,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:05,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:06,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:06,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292740207] [2023-11-12 02:11:06,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292740207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:06,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:06,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:11:06,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933438446] [2023-11-12 02:11:06,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:06,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:06,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:06,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:06,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:06,462 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:07,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:07,742 INFO L93 Difference]: Finished difference Result 864 states and 1514 transitions. [2023-11-12 02:11:07,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:07,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2023-11-12 02:11:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:07,771 INFO L225 Difference]: With dead ends: 864 [2023-11-12 02:11:07,771 INFO L226 Difference]: Without dead ends: 468 [2023-11-12 02:11:07,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:07,787 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 106 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:07,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 167 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 02:11:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2023-11-12 02:11:07,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2023-11-12 02:11:07,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6269315673289184) internal successors, (737), 453 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 737 transitions. [2023-11-12 02:11:07,875 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 737 transitions. Word has length 172 [2023-11-12 02:11:07,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:07,877 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 737 transitions. [2023-11-12 02:11:07,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:07,877 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 737 transitions. [2023-11-12 02:11:07,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-11-12 02:11:07,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:07,883 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:07,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:11:07,884 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:07,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:07,885 INFO L85 PathProgramCache]: Analyzing trace with hash -612505342, now seen corresponding path program 1 times [2023-11-12 02:11:07,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:07,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809724515] [2023-11-12 02:11:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:07,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:08,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:08,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809724515] [2023-11-12 02:11:08,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809724515] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:08,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:08,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:11:08,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649506148] [2023-11-12 02:11:08,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:08,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:08,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:08,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:08,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:08,389 INFO L87 Difference]: Start difference. First operand 454 states and 737 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:09,442 INFO L93 Difference]: Finished difference Result 1330 states and 2169 transitions. [2023-11-12 02:11:09,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:09,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2023-11-12 02:11:09,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:09,459 INFO L225 Difference]: With dead ends: 1330 [2023-11-12 02:11:09,460 INFO L226 Difference]: Without dead ends: 878 [2023-11-12 02:11:09,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:09,468 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 251 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:09,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 163 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:11:09,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2023-11-12 02:11:09,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 874. [2023-11-12 02:11:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 1.52233676975945) internal successors, (1329), 873 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1329 transitions. [2023-11-12 02:11:09,567 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1329 transitions. Word has length 177 [2023-11-12 02:11:09,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:09,568 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1329 transitions. [2023-11-12 02:11:09,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1329 transitions. [2023-11-12 02:11:09,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-11-12 02:11:09,576 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:09,578 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 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, 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, 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, 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] [2023-11-12 02:11:09,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:11:09,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:09,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:09,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1500805969, now seen corresponding path program 1 times [2023-11-12 02:11:09,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:09,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754730151] [2023-11-12 02:11:09,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:09,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:09,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:09,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754730151] [2023-11-12 02:11:09,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754730151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:09,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:09,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:11:09,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14235170] [2023-11-12 02:11:09,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:09,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:09,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:09,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:09,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:09,820 INFO L87 Difference]: Start difference. First operand 874 states and 1329 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:10,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:10,990 INFO L93 Difference]: Finished difference Result 2575 states and 3935 transitions. [2023-11-12 02:11:10,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:10,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2023-11-12 02:11:10,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:11,003 INFO L225 Difference]: With dead ends: 2575 [2023-11-12 02:11:11,003 INFO L226 Difference]: Without dead ends: 1703 [2023-11-12 02:11:11,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:11,006 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:11,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 02:11:11,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2023-11-12 02:11:11,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1687. [2023-11-12 02:11:11,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 1.4994068801897984) internal successors, (2528), 1686 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2528 transitions. [2023-11-12 02:11:11,058 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2528 transitions. Word has length 180 [2023-11-12 02:11:11,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:11,059 INFO L495 AbstractCegarLoop]: Abstraction has 1687 states and 2528 transitions. [2023-11-12 02:11:11,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2528 transitions. [2023-11-12 02:11:11,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-11-12 02:11:11,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:11,065 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 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] [2023-11-12 02:11:11,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:11:11,066 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:11,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:11,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2063767796, now seen corresponding path program 1 times [2023-11-12 02:11:11,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:11,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499554645] [2023-11-12 02:11:11,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:11,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:11,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:11:11,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:11,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499554645] [2023-11-12 02:11:11,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499554645] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:11,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:11,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:11:11,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522463044] [2023-11-12 02:11:11,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:11,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:11,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:11,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:11,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:11,450 INFO L87 Difference]: Start difference. First operand 1687 states and 2528 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:12,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:12,569 INFO L93 Difference]: Finished difference Result 4194 states and 6266 transitions. [2023-11-12 02:11:12,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:12,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2023-11-12 02:11:12,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:12,585 INFO L225 Difference]: With dead ends: 4194 [2023-11-12 02:11:12,586 INFO L226 Difference]: Without dead ends: 2509 [2023-11-12 02:11:12,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:12,597 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 236 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:12,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 113 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 02:11:12,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2023-11-12 02:11:12,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2508. [2023-11-12 02:11:12,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2507 states have (on average 1.4670921420023932) internal successors, (3678), 2507 states have internal predecessors, (3678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:12,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 3678 transitions. [2023-11-12 02:11:12,686 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 3678 transitions. Word has length 182 [2023-11-12 02:11:12,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:12,686 INFO L495 AbstractCegarLoop]: Abstraction has 2508 states and 3678 transitions. [2023-11-12 02:11:12,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 3678 transitions. [2023-11-12 02:11:12,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-12 02:11:12,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:12,695 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:12,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:11:12,695 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:12,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:12,696 INFO L85 PathProgramCache]: Analyzing trace with hash 158556796, now seen corresponding path program 1 times [2023-11-12 02:11:12,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:12,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480912129] [2023-11-12 02:11:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:12,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:11:13,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:13,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480912129] [2023-11-12 02:11:13,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480912129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:13,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:13,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:11:13,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139098812] [2023-11-12 02:11:13,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:13,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:13,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:13,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:13,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:13,019 INFO L87 Difference]: Start difference. First operand 2508 states and 3678 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:14,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:14,049 INFO L93 Difference]: Finished difference Result 5011 states and 7350 transitions. [2023-11-12 02:11:14,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:14,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 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 187 [2023-11-12 02:11:14,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:14,068 INFO L225 Difference]: With dead ends: 5011 [2023-11-12 02:11:14,068 INFO L226 Difference]: Without dead ends: 2505 [2023-11-12 02:11:14,071 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 [2023-11-12 02:11:14,073 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 106 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:14,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 386 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:11:14,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2023-11-12 02:11:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2096. [2023-11-12 02:11:14,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 1.3761336515513127) internal successors, (2883), 2095 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 2883 transitions. [2023-11-12 02:11:14,135 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 2883 transitions. Word has length 187 [2023-11-12 02:11:14,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:14,137 INFO L495 AbstractCegarLoop]: Abstraction has 2096 states and 2883 transitions. [2023-11-12 02:11:14,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:14,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 2883 transitions. [2023-11-12 02:11:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-11-12 02:11:14,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:14,144 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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, 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, 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, 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] [2023-11-12 02:11:14,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:11:14,145 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:14,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:14,146 INFO L85 PathProgramCache]: Analyzing trace with hash 819933047, now seen corresponding path program 1 times [2023-11-12 02:11:14,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:14,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101060477] [2023-11-12 02:11:14,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:14,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:11:14,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:14,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101060477] [2023-11-12 02:11:14,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101060477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:14,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:14,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:11:14,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970657314] [2023-11-12 02:11:14,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:14,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:14,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:14,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:14,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:14,618 INFO L87 Difference]: Start difference. First operand 2096 states and 2883 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:15,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:15,782 INFO L93 Difference]: Finished difference Result 6220 states and 8560 transitions. [2023-11-12 02:11:15,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:15,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 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 189 [2023-11-12 02:11:15,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:15,806 INFO L225 Difference]: With dead ends: 6220 [2023-11-12 02:11:15,806 INFO L226 Difference]: Without dead ends: 4126 [2023-11-12 02:11:15,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:15,812 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 205 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:15,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 199 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 02:11:15,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2023-11-12 02:11:15,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 4126. [2023-11-12 02:11:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4126 states, 4125 states have (on average 1.2334545454545454) internal successors, (5088), 4125 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4126 states to 4126 states and 5088 transitions. [2023-11-12 02:11:15,919 INFO L78 Accepts]: Start accepts. Automaton has 4126 states and 5088 transitions. Word has length 189 [2023-11-12 02:11:15,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:15,921 INFO L495 AbstractCegarLoop]: Abstraction has 4126 states and 5088 transitions. [2023-11-12 02:11:15,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:15,921 INFO L276 IsEmpty]: Start isEmpty. Operand 4126 states and 5088 transitions. [2023-11-12 02:11:15,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-11-12 02:11:15,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:15,936 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:15,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:11:15,937 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:15,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:15,938 INFO L85 PathProgramCache]: Analyzing trace with hash -975872118, now seen corresponding path program 1 times [2023-11-12 02:11:15,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:15,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547658483] [2023-11-12 02:11:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:15,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:11:16,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:16,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547658483] [2023-11-12 02:11:16,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547658483] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:16,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:16,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:11:16,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101132024] [2023-11-12 02:11:16,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:16,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:16,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:16,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:16,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:16,366 INFO L87 Difference]: Start difference. First operand 4126 states and 5088 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:17,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:17,505 INFO L93 Difference]: Finished difference Result 10294 states and 12765 transitions. [2023-11-12 02:11:17,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:17,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2023-11-12 02:11:17,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:17,539 INFO L225 Difference]: With dead ends: 10294 [2023-11-12 02:11:17,539 INFO L226 Difference]: Without dead ends: 6170 [2023-11-12 02:11:17,545 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 [2023-11-12 02:11:17,546 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 218 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:17,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 359 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:11:17,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6170 states. [2023-11-12 02:11:17,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6170 to 6166. [2023-11-12 02:11:17,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6166 states, 6165 states have (on average 1.2047039740470398) internal successors, (7427), 6165 states have internal predecessors, (7427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:17,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6166 states to 6166 states and 7427 transitions. [2023-11-12 02:11:17,693 INFO L78 Accepts]: Start accepts. Automaton has 6166 states and 7427 transitions. Word has length 193 [2023-11-12 02:11:17,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:17,694 INFO L495 AbstractCegarLoop]: Abstraction has 6166 states and 7427 transitions. [2023-11-12 02:11:17,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:17,695 INFO L276 IsEmpty]: Start isEmpty. Operand 6166 states and 7427 transitions. [2023-11-12 02:11:17,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-12 02:11:17,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:17,708 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 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, 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, 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, 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, 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] [2023-11-12 02:11:17,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:11:17,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:17,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:17,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1218419532, now seen corresponding path program 1 times [2023-11-12 02:11:17,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:17,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033441916] [2023-11-12 02:11:17,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:17,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:11:17,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:17,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033441916] [2023-11-12 02:11:17,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033441916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:17,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:17,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:11:17,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023351954] [2023-11-12 02:11:17,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:17,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:17,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:17,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:17,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:17,999 INFO L87 Difference]: Start difference. First operand 6166 states and 7427 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:18,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:18,492 INFO L93 Difference]: Finished difference Result 18464 states and 22238 transitions. [2023-11-12 02:11:18,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:18,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 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 201 [2023-11-12 02:11:18,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:18,566 INFO L225 Difference]: With dead ends: 18464 [2023-11-12 02:11:18,566 INFO L226 Difference]: Without dead ends: 12300 [2023-11-12 02:11:18,575 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 [2023-11-12 02:11:18,577 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 353 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:18,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 544 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:11:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12300 states. [2023-11-12 02:11:18,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12300 to 12298. [2023-11-12 02:11:18,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12298 states, 12297 states have (on average 1.2033829389281938) internal successors, (14798), 12297 states have internal predecessors, (14798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:18,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12298 states to 12298 states and 14798 transitions. [2023-11-12 02:11:18,886 INFO L78 Accepts]: Start accepts. Automaton has 12298 states and 14798 transitions. Word has length 201 [2023-11-12 02:11:18,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:18,887 INFO L495 AbstractCegarLoop]: Abstraction has 12298 states and 14798 transitions. [2023-11-12 02:11:18,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:18,888 INFO L276 IsEmpty]: Start isEmpty. Operand 12298 states and 14798 transitions. [2023-11-12 02:11:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-12 02:11:18,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:18,908 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:18,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:11:18,908 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:18,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:18,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1645874258, now seen corresponding path program 1 times [2023-11-12 02:11:18,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:18,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850809892] [2023-11-12 02:11:18,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:18,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:11:19,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:19,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850809892] [2023-11-12 02:11:19,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850809892] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:19,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:19,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:11:19,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713444975] [2023-11-12 02:11:19,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:19,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:19,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:19,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:19,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:19,250 INFO L87 Difference]: Start difference. First operand 12298 states and 14798 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:20,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:20,325 INFO L93 Difference]: Finished difference Result 31097 states and 38149 transitions. [2023-11-12 02:11:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:20,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2023-11-12 02:11:20,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:20,360 INFO L225 Difference]: With dead ends: 31097 [2023-11-12 02:11:20,362 INFO L226 Difference]: Without dead ends: 18801 [2023-11-12 02:11:20,379 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 [2023-11-12 02:11:20,382 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 236 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:20,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 402 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:11:20,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18801 states. [2023-11-12 02:11:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18801 to 18187. [2023-11-12 02:11:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18187 states, 18186 states have (on average 1.1702408446057406) internal successors, (21282), 18186 states have internal predecessors, (21282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:20,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18187 states to 18187 states and 21282 transitions. [2023-11-12 02:11:20,703 INFO L78 Accepts]: Start accepts. Automaton has 18187 states and 21282 transitions. Word has length 202 [2023-11-12 02:11:20,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:20,705 INFO L495 AbstractCegarLoop]: Abstraction has 18187 states and 21282 transitions. [2023-11-12 02:11:20,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:20,705 INFO L276 IsEmpty]: Start isEmpty. Operand 18187 states and 21282 transitions. [2023-11-12 02:11:20,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-11-12 02:11:20,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:20,782 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:20,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:11:20,783 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:20,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:20,784 INFO L85 PathProgramCache]: Analyzing trace with hash -957763539, now seen corresponding path program 1 times [2023-11-12 02:11:20,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:20,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245033482] [2023-11-12 02:11:20,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:20,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:11:21,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:21,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245033482] [2023-11-12 02:11:21,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245033482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:21,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:11:21,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:11:21,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22941671] [2023-11-12 02:11:21,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:21,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:21,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:21,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:21,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:21,249 INFO L87 Difference]: Start difference. First operand 18187 states and 21282 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:22,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:22,635 INFO L93 Difference]: Finished difference Result 50029 states and 58829 transitions. [2023-11-12 02:11:22,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:22,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2023-11-12 02:11:22,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:22,706 INFO L225 Difference]: With dead ends: 50029 [2023-11-12 02:11:22,706 INFO L226 Difference]: Without dead ends: 31844 [2023-11-12 02:11:22,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:11:22,729 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 216 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:22,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 198 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 02:11:22,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31844 states. [2023-11-12 02:11:23,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31844 to 31020. [2023-11-12 02:11:23,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31020 states, 31019 states have (on average 1.1656081756342886) internal successors, (36156), 31019 states have internal predecessors, (36156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:23,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31020 states to 31020 states and 36156 transitions. [2023-11-12 02:11:23,410 INFO L78 Accepts]: Start accepts. Automaton has 31020 states and 36156 transitions. Word has length 212 [2023-11-12 02:11:23,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:23,411 INFO L495 AbstractCegarLoop]: Abstraction has 31020 states and 36156 transitions. [2023-11-12 02:11:23,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:23,411 INFO L276 IsEmpty]: Start isEmpty. Operand 31020 states and 36156 transitions. [2023-11-12 02:11:23,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-11-12 02:11:23,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:23,484 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:23,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:11:23,485 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:23,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:23,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1870613808, now seen corresponding path program 1 times [2023-11-12 02:11:23,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:23,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368424741] [2023-11-12 02:11:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:23,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:11:24,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:24,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368424741] [2023-11-12 02:11:24,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368424741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:24,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606289011] [2023-11-12 02:11:24,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:24,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:24,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:24,353 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:24,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:11:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:24,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:11:24,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-12 02:11:24,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:24,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606289011] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:24,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:11:24,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 02:11:24,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583954458] [2023-11-12 02:11:24,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:24,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:24,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:24,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:24,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:11:24,908 INFO L87 Difference]: Start difference. First operand 31020 states and 36156 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:26,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:26,325 INFO L93 Difference]: Finished difference Result 82985 states and 96970 transitions. [2023-11-12 02:11:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:26,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2023-11-12 02:11:26,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:26,450 INFO L225 Difference]: With dead ends: 82985 [2023-11-12 02:11:26,450 INFO L226 Difference]: Without dead ends: 51967 [2023-11-12 02:11:26,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:11:26,487 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 92 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:26,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 215 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 02:11:26,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51967 states. [2023-11-12 02:11:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51967 to 50745. [2023-11-12 02:11:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50745 states, 50744 states have (on average 1.1506779126596247) internal successors, (58390), 50744 states have internal predecessors, (58390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50745 states to 50745 states and 58390 transitions. [2023-11-12 02:11:27,654 INFO L78 Accepts]: Start accepts. Automaton has 50745 states and 58390 transitions. Word has length 220 [2023-11-12 02:11:27,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:27,656 INFO L495 AbstractCegarLoop]: Abstraction has 50745 states and 58390 transitions. [2023-11-12 02:11:27,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:27,656 INFO L276 IsEmpty]: Start isEmpty. Operand 50745 states and 58390 transitions. [2023-11-12 02:11:27,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2023-11-12 02:11:27,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:27,711 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:27,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:27,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:11:27,918 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:27,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:27,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1916304460, now seen corresponding path program 1 times [2023-11-12 02:11:27,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:27,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817691777] [2023-11-12 02:11:27,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:27,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-12 02:11:28,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:28,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817691777] [2023-11-12 02:11:28,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817691777] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:28,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887488965] [2023-11-12 02:11:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:28,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:28,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:28,692 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:28,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:11:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:28,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:11:28,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-12 02:11:29,022 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:29,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887488965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:29,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:11:29,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 02:11:29,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442357823] [2023-11-12 02:11:29,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:29,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:29,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:29,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:29,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:11:29,025 INFO L87 Difference]: Start difference. First operand 50745 states and 58390 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:30,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:30,047 INFO L93 Difference]: Finished difference Result 141991 states and 163633 transitions. [2023-11-12 02:11:30,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:30,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 243 [2023-11-12 02:11:30,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:30,239 INFO L225 Difference]: With dead ends: 141991 [2023-11-12 02:11:30,239 INFO L226 Difference]: Without dead ends: 91654 [2023-11-12 02:11:30,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:11:30,268 INFO L413 NwaCegarLoop]: 578 mSDtfsCounter, 312 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:30,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 848 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:11:30,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91654 states. [2023-11-12 02:11:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91654 to 91652. [2023-11-12 02:11:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91652 states, 91651 states have (on average 1.1366488090691864) internal successors, (104175), 91651 states have internal predecessors, (104175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91652 states to 91652 states and 104175 transitions. [2023-11-12 02:11:31,948 INFO L78 Accepts]: Start accepts. Automaton has 91652 states and 104175 transitions. Word has length 243 [2023-11-12 02:11:31,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:31,949 INFO L495 AbstractCegarLoop]: Abstraction has 91652 states and 104175 transitions. [2023-11-12 02:11:31,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:31,949 INFO L276 IsEmpty]: Start isEmpty. Operand 91652 states and 104175 transitions. [2023-11-12 02:11:32,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2023-11-12 02:11:32,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:32,319 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:32,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 02:11:32,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:11:32,526 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:32,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:32,526 INFO L85 PathProgramCache]: Analyzing trace with hash -206882489, now seen corresponding path program 1 times [2023-11-12 02:11:32,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:32,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788733636] [2023-11-12 02:11:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:32,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 116 proven. 6 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-11-12 02:11:33,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:33,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788733636] [2023-11-12 02:11:33,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788733636] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:33,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480191085] [2023-11-12 02:11:33,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:33,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:33,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:33,198 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:33,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:11:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:33,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:11:33,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-12 02:11:33,547 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:33,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480191085] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:33,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:11:33,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 02:11:33,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671254656] [2023-11-12 02:11:33,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:33,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:33,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:33,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:33,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:11:33,551 INFO L87 Difference]: Start difference. First operand 91652 states and 104175 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:35,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:35,219 INFO L93 Difference]: Finished difference Result 178314 states and 202462 transitions. [2023-11-12 02:11:35,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:35,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 272 [2023-11-12 02:11:35,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:35,337 INFO L225 Difference]: With dead ends: 178314 [2023-11-12 02:11:35,337 INFO L226 Difference]: Without dead ends: 86867 [2023-11-12 02:11:35,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:11:35,390 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 212 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:35,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 357 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 02:11:35,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86867 states. [2023-11-12 02:11:36,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86867 to 86780. [2023-11-12 02:11:36,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86780 states, 86779 states have (on average 1.1255833784671407) internal successors, (97677), 86779 states have internal predecessors, (97677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:36,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86780 states to 86780 states and 97677 transitions. [2023-11-12 02:11:36,887 INFO L78 Accepts]: Start accepts. Automaton has 86780 states and 97677 transitions. Word has length 272 [2023-11-12 02:11:36,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:36,888 INFO L495 AbstractCegarLoop]: Abstraction has 86780 states and 97677 transitions. [2023-11-12 02:11:36,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:36,888 INFO L276 IsEmpty]: Start isEmpty. Operand 86780 states and 97677 transitions. [2023-11-12 02:11:36,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2023-11-12 02:11:36,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:36,945 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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] [2023-11-12 02:11:36,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:11:37,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:11:37,152 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:37,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:37,153 INFO L85 PathProgramCache]: Analyzing trace with hash -2061083146, now seen corresponding path program 1 times [2023-11-12 02:11:37,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:37,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428979445] [2023-11-12 02:11:37,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:37,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 98 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-12 02:11:38,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:38,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428979445] [2023-11-12 02:11:38,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428979445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:38,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127102718] [2023-11-12 02:11:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:38,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:38,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:38,101 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:38,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:11:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:38,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:11:38,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-12 02:11:38,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:11:38,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127102718] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:11:38,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:11:38,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 02:11:38,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995876206] [2023-11-12 02:11:38,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:11:38,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:11:38,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:38,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:11:38,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:11:38,646 INFO L87 Difference]: Start difference. First operand 86780 states and 97677 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:40,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:11:40,519 INFO L93 Difference]: Finished difference Result 182906 states and 207172 transitions. [2023-11-12 02:11:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:11:40,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 284 [2023-11-12 02:11:40,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:11:40,631 INFO L225 Difference]: With dead ends: 182906 [2023-11-12 02:11:40,631 INFO L226 Difference]: Without dead ends: 96534 [2023-11-12 02:11:40,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:11:40,673 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 98 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:11:40,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 343 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:11:40,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96534 states. [2023-11-12 02:11:41,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96534 to 94088. [2023-11-12 02:11:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94088 states, 94087 states have (on average 1.1299754482553381) internal successors, (106316), 94087 states have internal predecessors, (106316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:42,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94088 states to 94088 states and 106316 transitions. [2023-11-12 02:11:42,151 INFO L78 Accepts]: Start accepts. Automaton has 94088 states and 106316 transitions. Word has length 284 [2023-11-12 02:11:42,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:11:42,152 INFO L495 AbstractCegarLoop]: Abstraction has 94088 states and 106316 transitions. [2023-11-12 02:11:42,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:11:42,152 INFO L276 IsEmpty]: Start isEmpty. Operand 94088 states and 106316 transitions. [2023-11-12 02:11:42,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-12 02:11:42,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:11:42,218 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:11:42,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-12 02:11:42,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:11:42,424 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:11:42,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:11:42,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1720424733, now seen corresponding path program 1 times [2023-11-12 02:11:42,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:11:42,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177852354] [2023-11-12 02:11:42,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:42,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:11:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 117 proven. 6 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-11-12 02:11:43,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:11:43,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177852354] [2023-11-12 02:11:43,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177852354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:11:43,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510552011] [2023-11-12 02:11:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:11:43,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:11:43,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:11:43,340 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:11:43,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ff54890-ed30-48cf-89d4-5af3c05ed8fb/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:11:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:11:43,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:11:43,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:11:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 215 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 02:11:43,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:11:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 215 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 02:11:43,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510552011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:11:43,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:11:43,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2023-11-12 02:11:43,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583078075] [2023-11-12 02:11:43,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:11:43,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:11:43,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:11:43,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:11:43,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:11:43,891 INFO L87 Difference]: Start difference. First operand 94088 states and 106316 transitions. Second operand has 6 states, 6 states have (on average 55.333333333333336) internal successors, (332), 6 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)