./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label52.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label52.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7d08753ec3d09588e14fe223037879a9e4c26dd4e0293239a5101a4dc04bd1c9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:53:49,372 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:53:49,481 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:53:49,486 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:53:49,486 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:53:49,548 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:53:49,549 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:53:49,550 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:53:49,551 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:53:49,551 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:53:49,552 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:53:49,553 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:53:49,554 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:53:49,554 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:53:49,555 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:53:49,555 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:53:49,556 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:53:49,557 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:53:49,557 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:53:49,558 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:53:49,558 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:53:49,559 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:53:49,559 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:53:49,560 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:53:49,560 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:53:49,561 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:53:49,562 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:53:49,562 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:53:49,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:49,564 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:53:49,565 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:53:49,565 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:53:49,566 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:53:49,566 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:53:49,566 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:53:49,582 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:53:49,582 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:53:49,582 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:53:49,583 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:53:49,583 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_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d08753ec3d09588e14fe223037879a9e4c26dd4e0293239a5101a4dc04bd1c9 [2023-11-06 21:53:49,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:53:49,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:53:49,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:53:49,962 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:53:49,963 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:53:49,965 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/eca-rers2012/Problem19_label52.c [2023-11-06 21:53:53,170 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:53:53,845 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:53:53,845 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/sv-benchmarks/c/eca-rers2012/Problem19_label52.c [2023-11-06 21:53:53,897 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/data/0969244b0/29e7c02308934b2fb660337d9523deee/FLAG13a5ff5fd [2023-11-06 21:53:53,915 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/data/0969244b0/29e7c02308934b2fb660337d9523deee [2023-11-06 21:53:53,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:53:53,920 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:53:53,924 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:53,924 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:53:53,933 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:53:53,935 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:53" (1/1) ... [2023-11-06 21:53:53,937 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d8ac3ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:53, skipping insertion in model container [2023-11-06 21:53:53,937 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:53" (1/1) ... [2023-11-06 21:53:54,213 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:53:54,599 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_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/sv-benchmarks/c/eca-rers2012/Problem19_label52.c[7226,7239] [2023-11-06 21:53:56,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:56,667 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:53:56,729 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_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/sv-benchmarks/c/eca-rers2012/Problem19_label52.c[7226,7239] [2023-11-06 21:53:58,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:58,066 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:53:58,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:58 WrapperNode [2023-11-06 21:53:58,067 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:58,069 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:58,069 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:53:58,069 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:53:58,079 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:58" (1/1) ... [2023-11-06 21:53:58,234 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:58" (1/1) ... [2023-11-06 21:53:59,392 INFO L138 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9426 [2023-11-06 21:53:59,392 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:59,394 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:53:59,394 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:53:59,394 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:53:59,406 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:58" (1/1) ... [2023-11-06 21:53:59,416 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:58" (1/1) ... [2023-11-06 21:53:59,828 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:58" (1/1) ... [2023-11-06 21:53:59,829 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:58" (1/1) ... [2023-11-06 21:54:00,467 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:58" (1/1) ... [2023-11-06 21:54:00,522 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:58" (1/1) ... [2023-11-06 21:54:00,613 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:58" (1/1) ... [2023-11-06 21:54:00,754 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:58" (1/1) ... [2023-11-06 21:54:01,007 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:54:01,009 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:54:01,009 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:54:01,009 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:54:01,010 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:58" (1/1) ... [2023-11-06 21:54:01,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:54:01,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:01,050 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:54:01,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:54:01,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:54:01,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:54:01,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:54:01,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:54:01,195 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:54:01,198 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:54:13,365 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:54:13,405 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:54:13,405 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:54:13,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:54:13 BoogieIcfgContainer [2023-11-06 21:54:13,413 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:54:13,418 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:54:13,418 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:54:13,422 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:54:13,424 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:53:53" (1/3) ... [2023-11-06 21:54:13,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c566c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:54:13, skipping insertion in model container [2023-11-06 21:54:13,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:58" (2/3) ... [2023-11-06 21:54:13,428 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c566c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:54:13, skipping insertion in model container [2023-11-06 21:54:13,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:54:13" (3/3) ... [2023-11-06 21:54:13,430 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label52.c [2023-11-06 21:54:13,455 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:54:13,456 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:54:13,586 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:54:13,595 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1b044aae, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:54:13,596 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:54:13,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:13,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-06 21:54:13,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:13,628 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] [2023-11-06 21:54:13,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:13,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:13,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1246856209, now seen corresponding path program 1 times [2023-11-06 21:54:13,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:13,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576619548] [2023-11-06 21:54:13,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:13,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:14,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:14,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576619548] [2023-11-06 21:54:14,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576619548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:14,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:14,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:54:14,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896809567] [2023-11-06 21:54:14,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:14,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:54:14,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:14,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:54:14,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:54:14,165 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 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 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:26,946 INFO L93 Difference]: Finished difference Result 4957 states and 9398 transitions. [2023-11-06 21:54:26,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:54:26,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-06 21:54:26,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:27,001 INFO L225 Difference]: With dead ends: 4957 [2023-11-06 21:54:27,002 INFO L226 Difference]: Without dead ends: 3129 [2023-11-06 21:54:27,012 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 [2023-11-06 21:54:27,017 INFO L413 NwaCegarLoop]: 1373 mSDtfsCounter, 1571 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4344 mSolverCounterSat, 1517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1571 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 5861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 4344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:27,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1571 Valid, 1595 Invalid, 5861 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1517 Valid, 4344 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2023-11-06 21:54:27,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2023-11-06 21:54:27,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3108. [2023-11-06 21:54:27,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 1.6012230447376892) internal successors, (4975), 3107 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4975 transitions. [2023-11-06 21:54:27,228 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4975 transitions. Word has length 55 [2023-11-06 21:54:27,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:27,229 INFO L495 AbstractCegarLoop]: Abstraction has 3108 states and 4975 transitions. [2023-11-06 21:54:27,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:27,230 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4975 transitions. [2023-11-06 21:54:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-06 21:54:27,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:27,244 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-11-06 21:54:27,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:54:27,245 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:27,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:27,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1604718068, now seen corresponding path program 1 times [2023-11-06 21:54:27,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:27,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195582072] [2023-11-06 21:54:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:27,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:27,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:27,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195582072] [2023-11-06 21:54:27,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195582072] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:27,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:27,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:54:27,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511652899] [2023-11-06 21:54:27,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:27,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:54:27,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:27,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:54:27,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:27,931 INFO L87 Difference]: Start difference. First operand 3108 states and 4975 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:44,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:44,921 INFO L93 Difference]: Finished difference Result 10359 states and 16187 transitions. [2023-11-06 21:54:44,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:54:44,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2023-11-06 21:54:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:44,975 INFO L225 Difference]: With dead ends: 10359 [2023-11-06 21:54:44,975 INFO L226 Difference]: Without dead ends: 7253 [2023-11-06 21:54:44,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:54:44,983 INFO L413 NwaCegarLoop]: 1024 mSDtfsCounter, 4323 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 9504 mSolverCounterSat, 1498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4323 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 11002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1498 IncrementalHoareTripleChecker+Valid, 9504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:44,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4323 Valid, 1292 Invalid, 11002 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1498 Valid, 9504 Invalid, 0 Unknown, 0 Unchecked, 16.6s Time] [2023-11-06 21:54:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7253 states. [2023-11-06 21:54:45,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7253 to 7249. [2023-11-06 21:54:45,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 7248 states have (on average 1.4503311258278146) internal successors, (10512), 7248 states have internal predecessors, (10512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 10512 transitions. [2023-11-06 21:54:45,210 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 10512 transitions. Word has length 122 [2023-11-06 21:54:45,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:45,212 INFO L495 AbstractCegarLoop]: Abstraction has 7249 states and 10512 transitions. [2023-11-06 21:54:45,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:45,213 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 10512 transitions. [2023-11-06 21:54:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-11-06 21:54:45,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:45,229 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:45,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:54:45,230 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:45,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:45,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1152810954, now seen corresponding path program 1 times [2023-11-06 21:54:45,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:45,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779573348] [2023-11-06 21:54:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:45,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-06 21:54:46,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:46,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779573348] [2023-11-06 21:54:46,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779573348] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:46,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:46,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:54:46,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129874182] [2023-11-06 21:54:46,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:46,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:54:46,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:46,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:54:46,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:46,838 INFO L87 Difference]: Start difference. First operand 7249 states and 10512 transitions. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:01,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:01,939 INFO L93 Difference]: Finished difference Result 17269 states and 24867 transitions. [2023-11-06 21:55:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:55:01,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 329 [2023-11-06 21:55:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:02,008 INFO L225 Difference]: With dead ends: 17269 [2023-11-06 21:55:02,009 INFO L226 Difference]: Without dead ends: 11387 [2023-11-06 21:55:02,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:55:02,020 INFO L413 NwaCegarLoop]: 1803 mSDtfsCounter, 3756 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 9455 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3756 SdHoareTripleChecker+Valid, 2157 SdHoareTripleChecker+Invalid, 9885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 9455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:02,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3756 Valid, 2157 Invalid, 9885 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [430 Valid, 9455 Invalid, 0 Unknown, 0 Unchecked, 14.7s Time] [2023-11-06 21:55:02,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11387 states. [2023-11-06 21:55:02,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11387 to 11367. [2023-11-06 21:55:02,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11366 states have (on average 1.3286116487770543) internal successors, (15101), 11366 states have internal predecessors, (15101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 15101 transitions. [2023-11-06 21:55:02,351 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 15101 transitions. Word has length 329 [2023-11-06 21:55:02,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:02,357 INFO L495 AbstractCegarLoop]: Abstraction has 11367 states and 15101 transitions. [2023-11-06 21:55:02,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:02,358 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 15101 transitions. [2023-11-06 21:55:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2023-11-06 21:55:02,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:02,367 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:02,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:55:02,369 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:02,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:02,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1180990372, now seen corresponding path program 1 times [2023-11-06 21:55:02,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:02,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43290704] [2023-11-06 21:55:02,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:02,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-06 21:55:03,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:03,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43290704] [2023-11-06 21:55:03,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43290704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:03,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:03,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:55:03,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580338341] [2023-11-06 21:55:03,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:03,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:55:03,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:03,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:55:03,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:55:03,568 INFO L87 Difference]: Start difference. First operand 11367 states and 15101 transitions. Second operand has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:15,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:15,782 INFO L93 Difference]: Finished difference Result 20033 states and 27483 transitions. [2023-11-06 21:55:15,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:55:15,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 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 357 [2023-11-06 21:55:15,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:15,821 INFO L225 Difference]: With dead ends: 20033 [2023-11-06 21:55:15,822 INFO L226 Difference]: Without dead ends: 11367 [2023-11-06 21:55:15,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:55:15,834 INFO L413 NwaCegarLoop]: 1775 mSDtfsCounter, 1138 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7325 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 7333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:15,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1138 Valid, 2117 Invalid, 7333 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 7325 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2023-11-06 21:55:15,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11367 states. [2023-11-06 21:55:16,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11367 to 11367. [2023-11-06 21:55:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11366 states have (on average 1.3274678866795706) internal successors, (15088), 11366 states have internal predecessors, (15088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 15088 transitions. [2023-11-06 21:55:16,071 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 15088 transitions. Word has length 357 [2023-11-06 21:55:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:16,072 INFO L495 AbstractCegarLoop]: Abstraction has 11367 states and 15088 transitions. [2023-11-06 21:55:16,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.75) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:16,074 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 15088 transitions. [2023-11-06 21:55:16,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2023-11-06 21:55:16,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:16,085 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:16,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:55:16,085 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:16,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:16,086 INFO L85 PathProgramCache]: Analyzing trace with hash 507263328, now seen corresponding path program 1 times [2023-11-06 21:55:16,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:16,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189972006] [2023-11-06 21:55:16,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:16,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 21:55:17,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:17,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189972006] [2023-11-06 21:55:17,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189972006] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:17,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551901960] [2023-11-06 21:55:17,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:17,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:17,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:17,462 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:17,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:55:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:17,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:55:17,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-06 21:55:18,974 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:18,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551901960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:18,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:55:18,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-06 21:55:18,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775429905] [2023-11-06 21:55:18,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:18,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:55:18,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:18,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:55:18,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:55:18,981 INFO L87 Difference]: Start difference. First operand 11367 states and 15088 transitions. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:28,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:28,077 INFO L93 Difference]: Finished difference Result 24133 states and 33157 transitions. [2023-11-06 21:55:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:55:28,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 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 542 [2023-11-06 21:55:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:28,121 INFO L225 Difference]: With dead ends: 24133 [2023-11-06 21:55:28,122 INFO L226 Difference]: Without dead ends: 15498 [2023-11-06 21:55:28,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 541 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:55:28,138 INFO L413 NwaCegarLoop]: 1207 mSDtfsCounter, 1058 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4576 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 5385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 4576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:28,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1058 Valid, 1384 Invalid, 5385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [809 Valid, 4576 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2023-11-06 21:55:28,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15498 states. [2023-11-06 21:55:28,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15498 to 15496. [2023-11-06 21:55:28,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15496 states, 15495 states have (on average 1.2933849628912553) internal successors, (20041), 15495 states have internal predecessors, (20041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15496 states to 15496 states and 20041 transitions. [2023-11-06 21:55:28,437 INFO L78 Accepts]: Start accepts. Automaton has 15496 states and 20041 transitions. Word has length 542 [2023-11-06 21:55:28,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:28,439 INFO L495 AbstractCegarLoop]: Abstraction has 15496 states and 20041 transitions. [2023-11-06 21:55:28,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:28,439 INFO L276 IsEmpty]: Start isEmpty. Operand 15496 states and 20041 transitions. [2023-11-06 21:55:28,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2023-11-06 21:55:28,459 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:28,461 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:28,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:28,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:28,669 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:28,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:28,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1923004853, now seen corresponding path program 1 times [2023-11-06 21:55:28,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:28,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130527356] [2023-11-06 21:55:28,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:28,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 127 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:30,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:30,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130527356] [2023-11-06 21:55:30,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130527356] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656851205] [2023-11-06 21:55:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:30,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:30,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:30,255 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:30,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:55:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:30,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:55:30,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:30,701 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:30,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656851205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:30,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:55:30,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-06 21:55:30,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338242348] [2023-11-06 21:55:30,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:30,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:55:30,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:30,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:55:30,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:55:30,708 INFO L87 Difference]: Start difference. First operand 15496 states and 20041 transitions. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:40,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:40,484 INFO L93 Difference]: Finished difference Result 40540 states and 53991 transitions. [2023-11-06 21:55:40,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:55:40,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 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 611 [2023-11-06 21:55:40,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:40,539 INFO L225 Difference]: With dead ends: 40540 [2023-11-06 21:55:40,539 INFO L226 Difference]: Without dead ends: 27776 [2023-11-06 21:55:40,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:55:40,555 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 2531 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4053 mSolverCounterSat, 1472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2531 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 5525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1472 IncrementalHoareTripleChecker+Valid, 4053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:40,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2531 Valid, 814 Invalid, 5525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1472 Valid, 4053 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2023-11-06 21:55:40,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27776 states. [2023-11-06 21:55:40,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27776 to 27772. [2023-11-06 21:55:40,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27772 states, 27771 states have (on average 1.2915271326203595) internal successors, (35867), 27771 states have internal predecessors, (35867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27772 states to 27772 states and 35867 transitions. [2023-11-06 21:55:41,028 INFO L78 Accepts]: Start accepts. Automaton has 27772 states and 35867 transitions. Word has length 611 [2023-11-06 21:55:41,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:41,030 INFO L495 AbstractCegarLoop]: Abstraction has 27772 states and 35867 transitions. [2023-11-06 21:55:41,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:41,030 INFO L276 IsEmpty]: Start isEmpty. Operand 27772 states and 35867 transitions. [2023-11-06 21:55:41,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2023-11-06 21:55:41,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:41,049 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:41,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:41,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 21:55:41,256 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:41,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:41,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1271826734, now seen corresponding path program 1 times [2023-11-06 21:55:41,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:41,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011094473] [2023-11-06 21:55:41,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:41,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:42,056 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-06 21:55:42,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:42,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011094473] [2023-11-06 21:55:42,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011094473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:42,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:42,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:55:42,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548765423] [2023-11-06 21:55:42,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:42,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:55:42,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:42,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:55:42,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:55:42,062 INFO L87 Difference]: Start difference. First operand 27772 states and 35867 transitions. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:51,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:51,036 INFO L93 Difference]: Finished difference Result 58285 states and 75896 transitions. [2023-11-06 21:55:51,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:55:51,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 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 616 [2023-11-06 21:55:51,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:51,102 INFO L225 Difference]: With dead ends: 58285 [2023-11-06 21:55:51,102 INFO L226 Difference]: Without dead ends: 33245 [2023-11-06 21:55:51,130 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 [2023-11-06 21:55:51,132 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 1383 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3925 mSolverCounterSat, 1660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 5585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1660 IncrementalHoareTripleChecker+Valid, 3925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:51,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1383 Valid, 733 Invalid, 5585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1660 Valid, 3925 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2023-11-06 21:55:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33245 states. [2023-11-06 21:55:51,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33245 to 33235. [2023-11-06 21:55:51,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33235 states, 33234 states have (on average 1.228771739784558) internal successors, (40837), 33234 states have internal predecessors, (40837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:51,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33235 states to 33235 states and 40837 transitions. [2023-11-06 21:55:51,730 INFO L78 Accepts]: Start accepts. Automaton has 33235 states and 40837 transitions. Word has length 616 [2023-11-06 21:55:51,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:51,732 INFO L495 AbstractCegarLoop]: Abstraction has 33235 states and 40837 transitions. [2023-11-06 21:55:51,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:51,733 INFO L276 IsEmpty]: Start isEmpty. Operand 33235 states and 40837 transitions. [2023-11-06 21:55:51,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 634 [2023-11-06 21:55:51,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:51,741 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:51,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:55:51,742 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:51,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:51,742 INFO L85 PathProgramCache]: Analyzing trace with hash -491451912, now seen corresponding path program 1 times [2023-11-06 21:55:51,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:51,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125294674] [2023-11-06 21:55:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:51,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-06 21:55:52,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:52,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125294674] [2023-11-06 21:55:52,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125294674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:52,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:52,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:55:52,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478048935] [2023-11-06 21:55:52,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:52,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:55:52,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:52,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:55:52,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:55:52,542 INFO L87 Difference]: Start difference. First operand 33235 states and 40837 transitions. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:03,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:56:03,207 INFO L93 Difference]: Finished difference Result 91260 states and 113481 transitions. [2023-11-06 21:56:03,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:56:03,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 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 633 [2023-11-06 21:56:03,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:56:03,311 INFO L225 Difference]: With dead ends: 91260 [2023-11-06 21:56:03,312 INFO L226 Difference]: Without dead ends: 60757 [2023-11-06 21:56:03,338 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 [2023-11-06 21:56:03,339 INFO L413 NwaCegarLoop]: 1747 mSDtfsCounter, 1350 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 4280 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 5710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:56:03,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1350 Valid, 2013 Invalid, 5710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4280 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2023-11-06 21:56:03,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60757 states. [2023-11-06 21:56:04,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60757 to 55276. [2023-11-06 21:56:04,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55276 states, 55275 states have (on average 1.1672003618272275) internal successors, (64517), 55275 states have internal predecessors, (64517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55276 states to 55276 states and 64517 transitions. [2023-11-06 21:56:04,500 INFO L78 Accepts]: Start accepts. Automaton has 55276 states and 64517 transitions. Word has length 633 [2023-11-06 21:56:04,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:56:04,502 INFO L495 AbstractCegarLoop]: Abstraction has 55276 states and 64517 transitions. [2023-11-06 21:56:04,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:04,502 INFO L276 IsEmpty]: Start isEmpty. Operand 55276 states and 64517 transitions. [2023-11-06 21:56:04,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2023-11-06 21:56:04,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:56:04,513 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:04,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 21:56:04,514 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:56:04,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:04,515 INFO L85 PathProgramCache]: Analyzing trace with hash -323741212, now seen corresponding path program 1 times [2023-11-06 21:56:04,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:04,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162354824] [2023-11-06 21:56:04,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:04,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 105 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:09,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:09,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162354824] [2023-11-06 21:56:09,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162354824] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:09,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184836907] [2023-11-06 21:56:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:09,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:09,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:09,008 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:09,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:56:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:09,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:56:09,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2023-11-06 21:56:09,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:56:09,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184836907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:56:09,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:56:09,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-06 21:56:09,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841091806] [2023-11-06 21:56:09,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:56:09,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:56:09,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:09,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:56:09,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:56:09,517 INFO L87 Difference]: Start difference. First operand 55276 states and 64517 transitions. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:56:18,504 INFO L93 Difference]: Finished difference Result 110553 states and 129119 transitions. [2023-11-06 21:56:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:56:18,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 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 749 [2023-11-06 21:56:18,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:56:18,592 INFO L225 Difference]: With dead ends: 110553 [2023-11-06 21:56:18,592 INFO L226 Difference]: Without dead ends: 58009 [2023-11-06 21:56:18,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 748 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:56:18,626 INFO L413 NwaCegarLoop]: 2903 mSDtfsCounter, 1551 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3678 mSolverCounterSat, 1466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 3085 SdHoareTripleChecker+Invalid, 5144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1466 IncrementalHoareTripleChecker+Valid, 3678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:56:18,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1551 Valid, 3085 Invalid, 5144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1466 Valid, 3678 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2023-11-06 21:56:18,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58009 states. [2023-11-06 21:56:19,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58009 to 58003. [2023-11-06 21:56:19,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58003 states, 58002 states have (on average 1.116909761732354) internal successors, (64783), 58002 states have internal predecessors, (64783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:19,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58003 states to 58003 states and 64783 transitions. [2023-11-06 21:56:19,564 INFO L78 Accepts]: Start accepts. Automaton has 58003 states and 64783 transitions. Word has length 749 [2023-11-06 21:56:19,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:56:19,566 INFO L495 AbstractCegarLoop]: Abstraction has 58003 states and 64783 transitions. [2023-11-06 21:56:19,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:19,567 INFO L276 IsEmpty]: Start isEmpty. Operand 58003 states and 64783 transitions. [2023-11-06 21:56:19,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2023-11-06 21:56:19,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:56:19,579 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:19,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:19,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 21:56:19,786 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:56:19,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:19,787 INFO L85 PathProgramCache]: Analyzing trace with hash 568097090, now seen corresponding path program 1 times [2023-11-06 21:56:19,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:19,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909111883] [2023-11-06 21:56:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:19,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 105 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:56:23,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:23,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909111883] [2023-11-06 21:56:23,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909111883] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:23,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105781581] [2023-11-06 21:56:23,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:23,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:23,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:23,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:23,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:56:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:23,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:56:23,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2023-11-06 21:56:23,850 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:56:23,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105781581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:56:23,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:56:23,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-06 21:56:23,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232743446] [2023-11-06 21:56:23,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:56:23,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:56:23,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:23,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:56:23,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:56:23,855 INFO L87 Difference]: Start difference. First operand 58003 states and 64783 transitions. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:35,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:56:35,478 INFO L93 Difference]: Finished difference Result 155697 states and 175053 transitions. [2023-11-06 21:56:35,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:56:35,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 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 761 [2023-11-06 21:56:35,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:56:35,593 INFO L225 Difference]: With dead ends: 155697 [2023-11-06 21:56:35,593 INFO L226 Difference]: Without dead ends: 100426 [2023-11-06 21:56:35,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 760 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:56:35,632 INFO L413 NwaCegarLoop]: 3189 mSDtfsCounter, 1424 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 5085 mSolverCounterSat, 984 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1424 SdHoareTripleChecker+Valid, 3361 SdHoareTripleChecker+Invalid, 6069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 984 IncrementalHoareTripleChecker+Valid, 5085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2023-11-06 21:56:35,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1424 Valid, 3361 Invalid, 6069 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [984 Valid, 5085 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2023-11-06 21:56:35,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100426 states. [2023-11-06 21:56:37,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100426 to 97615. [2023-11-06 21:56:37,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97615 states, 97614 states have (on average 1.093757043047104) internal successors, (106766), 97614 states have internal predecessors, (106766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:37,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97615 states to 97615 states and 106766 transitions. [2023-11-06 21:56:37,461 INFO L78 Accepts]: Start accepts. Automaton has 97615 states and 106766 transitions. Word has length 761 [2023-11-06 21:56:37,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:56:37,461 INFO L495 AbstractCegarLoop]: Abstraction has 97615 states and 106766 transitions. [2023-11-06 21:56:37,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:37,462 INFO L276 IsEmpty]: Start isEmpty. Operand 97615 states and 106766 transitions. [2023-11-06 21:56:37,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2023-11-06 21:56:37,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:56:37,474 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:37,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:37,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:56:37,681 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:56:37,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:37,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1474438302, now seen corresponding path program 1 times [2023-11-06 21:56:37,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:37,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981613390] [2023-11-06 21:56:37,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:37,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 327 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2023-11-06 21:56:38,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:38,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981613390] [2023-11-06 21:56:38,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981613390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:56:38,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:56:38,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:56:38,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097299586] [2023-11-06 21:56:38,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:56:38,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:56:38,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:38,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:56:38,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:56:38,806 INFO L87 Difference]: Start difference. First operand 97615 states and 106766 transitions. Second operand has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:56:57,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:56:57,537 INFO L93 Difference]: Finished difference Result 299170 states and 331090 transitions. [2023-11-06 21:56:57,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:56:57,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 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 839 [2023-11-06 21:56:57,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:56:58,097 INFO L225 Difference]: With dead ends: 299170 [2023-11-06 21:56:58,097 INFO L226 Difference]: Without dead ends: 204287 [2023-11-06 21:56:58,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:56:58,202 INFO L413 NwaCegarLoop]: 976 mSDtfsCounter, 3308 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 8857 mSolverCounterSat, 2914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3308 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 11771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2914 IncrementalHoareTripleChecker+Valid, 8857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:56:58,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3308 Valid, 1239 Invalid, 11771 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2914 Valid, 8857 Invalid, 0 Unknown, 0 Unchecked, 17.0s Time] [2023-11-06 21:56:58,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204287 states. [2023-11-06 21:57:00,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204287 to 194610. [2023-11-06 21:57:01,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194610 states, 194609 states have (on average 1.0927038317857858) internal successors, (212650), 194609 states have internal predecessors, (212650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:01,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194610 states to 194610 states and 212650 transitions. [2023-11-06 21:57:01,512 INFO L78 Accepts]: Start accepts. Automaton has 194610 states and 212650 transitions. Word has length 839 [2023-11-06 21:57:01,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:01,513 INFO L495 AbstractCegarLoop]: Abstraction has 194610 states and 212650 transitions. [2023-11-06 21:57:01,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:01,514 INFO L276 IsEmpty]: Start isEmpty. Operand 194610 states and 212650 transitions. [2023-11-06 21:57:01,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2023-11-06 21:57:01,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:01,530 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 3, 3, 3, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:01,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 21:57:01,530 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:01,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:01,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1886035100, now seen corresponding path program 1 times [2023-11-06 21:57:01,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:01,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708657693] [2023-11-06 21:57:01,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:01,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 159 proven. 418 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2023-11-06 21:57:04,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:04,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708657693] [2023-11-06 21:57:04,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708657693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:04,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614991651] [2023-11-06 21:57:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:04,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:04,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:04,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:04,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd8b2d2-3be9-4c4c-a9b7-0991f878b15a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:57:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:04,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:57:04,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2023-11-06 21:57:04,662 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:57:04,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614991651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:04,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:57:04,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-06 21:57:04,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127435426] [2023-11-06 21:57:04,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:04,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:57:04,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:04,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:57:04,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:57:04,672 INFO L87 Difference]: Start difference. First operand 194610 states and 212650 transitions. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:57:14,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:14,961 INFO L93 Difference]: Finished difference Result 427449 states and 469734 transitions. [2023-11-06 21:57:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:57:14,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 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 915 [2023-11-06 21:57:14,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted.