./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label51.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_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/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_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label51.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/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_171df3c2-5502-4c00-9263-170fabd9d6a4/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 74edf29578da59b17de672f50e10ed8f88a3850b8ffae9884ae020db50745360 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:14:36,601 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:14:36,691 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:14:36,697 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:14:36,698 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:14:36,752 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:14:36,753 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:14:36,754 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:14:36,755 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:14:36,760 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:14:36,762 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:14:36,762 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:14:36,763 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:14:36,764 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:14:36,765 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:14:36,765 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:14:36,766 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:14:36,766 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:14:36,767 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:14:36,767 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:14:36,768 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:14:36,768 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:14:36,769 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:14:36,769 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:14:36,769 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:14:36,770 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:14:36,771 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:14:36,771 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:14:36,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:36,772 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:14:36,773 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:14:36,773 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:14:36,774 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:14:36,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:14:36,774 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:14:36,774 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:14:36,775 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:14:36,775 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:14:36,775 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:14:36,775 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_171df3c2-5502-4c00-9263-170fabd9d6a4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74edf29578da59b17de672f50e10ed8f88a3850b8ffae9884ae020db50745360 [2023-11-06 21:14:37,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:14:37,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:14:37,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:14:37,124 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:14:37,124 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:14:37,126 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/eca-rers2012/Problem03_label51.c [2023-11-06 21:14:40,304 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:14:40,717 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:14:40,718 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/sv-benchmarks/c/eca-rers2012/Problem03_label51.c [2023-11-06 21:14:40,741 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/data/d9f132870/11bfc1990f6549fb8c4f31d2242b8348/FLAG8a6cf24d0 [2023-11-06 21:14:40,760 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/data/d9f132870/11bfc1990f6549fb8c4f31d2242b8348 [2023-11-06 21:14:40,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:14:40,769 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:14:40,773 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:40,773 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:14:40,779 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:14:40,780 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:40" (1/1) ... [2023-11-06 21:14:40,781 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dbeb383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:40, skipping insertion in model container [2023-11-06 21:14:40,782 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:40" (1/1) ... [2023-11-06 21:14:40,875 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:14:41,663 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_171df3c2-5502-4c00-9263-170fabd9d6a4/sv-benchmarks/c/eca-rers2012/Problem03_label51.c[59610,59623] [2023-11-06 21:14:41,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:41,705 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:14:42,168 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_171df3c2-5502-4c00-9263-170fabd9d6a4/sv-benchmarks/c/eca-rers2012/Problem03_label51.c[59610,59623] [2023-11-06 21:14:42,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:42,204 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:14:42,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:42 WrapperNode [2023-11-06 21:14:42,205 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:42,206 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:42,207 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:14:42,207 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:14:42,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:42" (1/1) ... [2023-11-06 21:14:42,262 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:42" (1/1) ... [2023-11-06 21:14:42,344 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-11-06 21:14:42,344 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:42,345 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:14:42,345 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:14:42,346 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:14:42,356 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:42" (1/1) ... [2023-11-06 21:14:42,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:42" (1/1) ... [2023-11-06 21:14:42,365 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:42" (1/1) ... [2023-11-06 21:14:42,365 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:42" (1/1) ... [2023-11-06 21:14:42,423 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:42" (1/1) ... [2023-11-06 21:14:42,435 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:42" (1/1) ... [2023-11-06 21:14:42,446 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:42" (1/1) ... [2023-11-06 21:14:42,474 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:42" (1/1) ... [2023-11-06 21:14:42,489 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:14:42,490 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:14:42,490 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:14:42,491 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:14:42,491 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:42" (1/1) ... [2023-11-06 21:14:42,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:42,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:42,524 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:14:42,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:14:42,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:14:42,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:14:42,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:14:42,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:14:42,665 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:14:42,667 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:14:44,844 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:14:44,863 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:14:44,863 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:14:44,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:44 BoogieIcfgContainer [2023-11-06 21:14:44,868 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:14:44,871 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:14:44,871 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:14:44,875 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:14:44,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:14:40" (1/3) ... [2023-11-06 21:14:44,878 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ba7707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:44, skipping insertion in model container [2023-11-06 21:14:44,878 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:42" (2/3) ... [2023-11-06 21:14:44,879 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ba7707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:44, skipping insertion in model container [2023-11-06 21:14:44,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:44" (3/3) ... [2023-11-06 21:14:44,881 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label51.c [2023-11-06 21:14:44,905 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:14:44,906 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:14:44,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:14:44,993 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;@7f9bae88, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:14:44,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:14:45,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:45,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-06 21:14:45,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:45,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:45,030 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:45,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:45,043 INFO L85 PathProgramCache]: Analyzing trace with hash 951431538, now seen corresponding path program 1 times [2023-11-06 21:14:45,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:45,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106937134] [2023-11-06 21:14:45,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:45,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:46,493 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 21:14:46,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:46,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106937134] [2023-11-06 21:14:46,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106937134] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:46,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:46,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:14:46,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031382246] [2023-11-06 21:14:46,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:46,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:46,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:46,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:46,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:46,560 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:48,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:48,067 INFO L93 Difference]: Finished difference Result 838 states and 1485 transitions. [2023-11-06 21:14:48,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:48,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2023-11-06 21:14:48,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:48,093 INFO L225 Difference]: With dead ends: 838 [2023-11-06 21:14:48,094 INFO L226 Difference]: Without dead ends: 458 [2023-11-06 21:14:48,101 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 21:14:48,106 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 79 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:48,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 143 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 21:14:48,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2023-11-06 21:14:48,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 447. [2023-11-06 21:14:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5919282511210762) internal successors, (710), 446 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 710 transitions. [2023-11-06 21:14:48,191 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 710 transitions. Word has length 188 [2023-11-06 21:14:48,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:48,193 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 710 transitions. [2023-11-06 21:14:48,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:48,194 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 710 transitions. [2023-11-06 21:14:48,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-06 21:14:48,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:48,199 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:14:48,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:14:48,200 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:48,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:48,201 INFO L85 PathProgramCache]: Analyzing trace with hash -76393258, now seen corresponding path program 1 times [2023-11-06 21:14:48,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:48,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839460270] [2023-11-06 21:14:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:48,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:48,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:48,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839460270] [2023-11-06 21:14:48,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839460270] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:48,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:48,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:14:48,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732074478] [2023-11-06 21:14:48,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:48,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:48,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:48,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:48,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:48,643 INFO L87 Difference]: Start difference. First operand 447 states and 710 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:49,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:49,642 INFO L93 Difference]: Finished difference Result 1298 states and 2071 transitions. [2023-11-06 21:14:49,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:49,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2023-11-06 21:14:49,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:49,648 INFO L225 Difference]: With dead ends: 1298 [2023-11-06 21:14:49,648 INFO L226 Difference]: Without dead ends: 853 [2023-11-06 21:14:49,650 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 21:14:49,651 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 216 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:49,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 192 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 21:14:49,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2023-11-06 21:14:49,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 853. [2023-11-06 21:14:49,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 1.3873239436619718) internal successors, (1182), 852 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1182 transitions. [2023-11-06 21:14:49,697 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1182 transitions. Word has length 194 [2023-11-06 21:14:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:49,697 INFO L495 AbstractCegarLoop]: Abstraction has 853 states and 1182 transitions. [2023-11-06 21:14:49,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:49,698 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1182 transitions. [2023-11-06 21:14:49,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-06 21:14:49,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:49,703 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-06 21:14:49,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:14:49,703 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:49,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:49,714 INFO L85 PathProgramCache]: Analyzing trace with hash -647571538, now seen corresponding path program 1 times [2023-11-06 21:14:49,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:49,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233374247] [2023-11-06 21:14:49,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:49,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:50,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:50,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233374247] [2023-11-06 21:14:50,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233374247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:50,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:50,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:14:50,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285215364] [2023-11-06 21:14:50,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:50,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:50,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:50,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:50,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:50,161 INFO L87 Difference]: Start difference. First operand 853 states and 1182 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:51,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:51,299 INFO L93 Difference]: Finished difference Result 2535 states and 3513 transitions. [2023-11-06 21:14:51,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:51,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2023-11-06 21:14:51,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:51,310 INFO L225 Difference]: With dead ends: 2535 [2023-11-06 21:14:51,310 INFO L226 Difference]: Without dead ends: 1684 [2023-11-06 21:14:51,312 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 21:14:51,314 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 241 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:51,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 222 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 21:14:51,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2023-11-06 21:14:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1682. [2023-11-06 21:14:51,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1681 states have (on average 1.3277810826888756) internal successors, (2232), 1681 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:51,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2232 transitions. [2023-11-06 21:14:51,384 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2232 transitions. Word has length 201 [2023-11-06 21:14:51,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:51,387 INFO L495 AbstractCegarLoop]: Abstraction has 1682 states and 2232 transitions. [2023-11-06 21:14:51,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:51,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2232 transitions. [2023-11-06 21:14:51,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-06 21:14:51,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:51,395 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:14:51,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:14:51,396 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:51,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:51,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1839216971, now seen corresponding path program 1 times [2023-11-06 21:14:51,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:51,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760564546] [2023-11-06 21:14:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:51,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:14:51,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:51,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760564546] [2023-11-06 21:14:51,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760564546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:51,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:51,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:14:51,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159510725] [2023-11-06 21:14:51,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:51,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:51,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:51,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:51,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:51,612 INFO L87 Difference]: Start difference. First operand 1682 states and 2232 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:52,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:52,720 INFO L93 Difference]: Finished difference Result 5006 states and 6651 transitions. [2023-11-06 21:14:52,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:52,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 202 [2023-11-06 21:14:52,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:52,739 INFO L225 Difference]: With dead ends: 5006 [2023-11-06 21:14:52,740 INFO L226 Difference]: Without dead ends: 3326 [2023-11-06 21:14:52,742 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 21:14:52,744 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:52,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 21:14:52,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2023-11-06 21:14:52,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 3310. [2023-11-06 21:14:52,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3310 states, 3309 states have (on average 1.3019038984587488) internal successors, (4308), 3309 states have internal predecessors, (4308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:52,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3310 states to 3310 states and 4308 transitions. [2023-11-06 21:14:52,855 INFO L78 Accepts]: Start accepts. Automaton has 3310 states and 4308 transitions. Word has length 202 [2023-11-06 21:14:52,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:52,856 INFO L495 AbstractCegarLoop]: Abstraction has 3310 states and 4308 transitions. [2023-11-06 21:14:52,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:52,856 INFO L276 IsEmpty]: Start isEmpty. Operand 3310 states and 4308 transitions. [2023-11-06 21:14:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-11-06 21:14:52,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:52,865 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:52,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:14:52,866 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:52,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:52,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1199319968, now seen corresponding path program 1 times [2023-11-06 21:14:52,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:52,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311220671] [2023-11-06 21:14:52,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:52,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:14:53,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:53,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311220671] [2023-11-06 21:14:53,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311220671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:53,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:53,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:14:53,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180251309] [2023-11-06 21:14:53,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:53,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:53,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:53,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:53,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:53,196 INFO L87 Difference]: Start difference. First operand 3310 states and 4308 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:54,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:54,304 INFO L93 Difference]: Finished difference Result 8245 states and 11008 transitions. [2023-11-06 21:14:54,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:54,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2023-11-06 21:14:54,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:54,330 INFO L225 Difference]: With dead ends: 8245 [2023-11-06 21:14:54,331 INFO L226 Difference]: Without dead ends: 4937 [2023-11-06 21:14:54,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:54,336 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 233 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:54,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 404 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 21:14:54,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2023-11-06 21:14:54,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 4935. [2023-11-06 21:14:54,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4935 states, 4934 states have (on average 1.2474665585731657) internal successors, (6155), 4934 states have internal predecessors, (6155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:54,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4935 states to 4935 states and 6155 transitions. [2023-11-06 21:14:54,463 INFO L78 Accepts]: Start accepts. Automaton has 4935 states and 6155 transitions. Word has length 209 [2023-11-06 21:14:54,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:54,464 INFO L495 AbstractCegarLoop]: Abstraction has 4935 states and 6155 transitions. [2023-11-06 21:14:54,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:54,464 INFO L276 IsEmpty]: Start isEmpty. Operand 4935 states and 6155 transitions. [2023-11-06 21:14:54,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2023-11-06 21:14:54,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:54,477 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:14:54,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:14:54,477 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:54,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:54,478 INFO L85 PathProgramCache]: Analyzing trace with hash -456720928, now seen corresponding path program 1 times [2023-11-06 21:14:54,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:54,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060387078] [2023-11-06 21:14:54,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:54,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:14:55,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:55,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060387078] [2023-11-06 21:14:55,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060387078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:55,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:55,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:14:55,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362227237] [2023-11-06 21:14:55,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:55,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:55,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:55,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:55,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:55,175 INFO L87 Difference]: Start difference. First operand 4935 states and 6155 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:56,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:56,374 INFO L93 Difference]: Finished difference Result 14564 states and 18200 transitions. [2023-11-06 21:14:56,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:56,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 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 242 [2023-11-06 21:14:56,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:56,425 INFO L225 Difference]: With dead ends: 14564 [2023-11-06 21:14:56,426 INFO L226 Difference]: Without dead ends: 9631 [2023-11-06 21:14:56,431 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 21:14:56,434 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 216 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:56,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 196 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 21:14:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9631 states. [2023-11-06 21:14:56,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9631 to 9622. [2023-11-06 21:14:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9622 states, 9621 states have (on average 1.2259640370023905) internal successors, (11795), 9621 states have internal predecessors, (11795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:56,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9622 states to 9622 states and 11795 transitions. [2023-11-06 21:14:56,694 INFO L78 Accepts]: Start accepts. Automaton has 9622 states and 11795 transitions. Word has length 242 [2023-11-06 21:14:56,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:56,695 INFO L495 AbstractCegarLoop]: Abstraction has 9622 states and 11795 transitions. [2023-11-06 21:14:56,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 9622 states and 11795 transitions. [2023-11-06 21:14:56,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-06 21:14:56,723 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:56,724 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, 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] [2023-11-06 21:14:56,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:14:56,725 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:56,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:56,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1078259094, now seen corresponding path program 1 times [2023-11-06 21:14:56,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:56,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697478546] [2023-11-06 21:14:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:56,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:14:57,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:57,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697478546] [2023-11-06 21:14:57,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697478546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:57,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:57,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:14:57,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777133775] [2023-11-06 21:14:57,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:57,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:57,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:57,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:57,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:57,300 INFO L87 Difference]: Start difference. First operand 9622 states and 11795 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:58,474 INFO L93 Difference]: Finished difference Result 25777 states and 31494 transitions. [2023-11-06 21:14:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:58,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2023-11-06 21:14:58,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:58,588 INFO L225 Difference]: With dead ends: 25777 [2023-11-06 21:14:58,588 INFO L226 Difference]: Without dead ends: 16157 [2023-11-06 21:14:58,598 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 21:14:58,599 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 243 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:58,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 223 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 21:14:58,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16157 states. [2023-11-06 21:14:58,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16157 to 16148. [2023-11-06 21:14:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16148 states, 16147 states have (on average 1.2127330154208211) internal successors, (19582), 16147 states have internal predecessors, (19582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:58,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16148 states to 16148 states and 19582 transitions. [2023-11-06 21:14:58,967 INFO L78 Accepts]: Start accepts. Automaton has 16148 states and 19582 transitions. Word has length 252 [2023-11-06 21:14:58,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:58,967 INFO L495 AbstractCegarLoop]: Abstraction has 16148 states and 19582 transitions. [2023-11-06 21:14:58,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:58,968 INFO L276 IsEmpty]: Start isEmpty. Operand 16148 states and 19582 transitions. [2023-11-06 21:14:58,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-11-06 21:14:58,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:58,997 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:14:58,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:14:58,997 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:58,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:58,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1716419235, now seen corresponding path program 1 times [2023-11-06 21:14:58,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:58,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853199461] [2023-11-06 21:14:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:58,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-06 21:14:59,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:59,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853199461] [2023-11-06 21:14:59,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853199461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:59,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:59,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:14:59,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823392192] [2023-11-06 21:14:59,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:59,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:14:59,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:59,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:14:59,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:14:59,528 INFO L87 Difference]: Start difference. First operand 16148 states and 19582 transitions. Second operand has 4 states, 4 states have (on average 52.25) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:00,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:00,833 INFO L93 Difference]: Finished difference Result 37733 states and 45990 transitions. [2023-11-06 21:15:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:15:00,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 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 254 [2023-11-06 21:15:00,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:00,875 INFO L225 Difference]: With dead ends: 37733 [2023-11-06 21:15:00,876 INFO L226 Difference]: Without dead ends: 22196 [2023-11-06 21:15:00,895 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 21:15:00,897 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 471 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:00,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 53 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 21:15:00,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22196 states. [2023-11-06 21:15:01,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22196 to 22189. [2023-11-06 21:15:01,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22189 states, 22188 states have (on average 1.1619343789435732) internal successors, (25781), 22188 states have internal predecessors, (25781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:01,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22189 states to 22189 states and 25781 transitions. [2023-11-06 21:15:01,452 INFO L78 Accepts]: Start accepts. Automaton has 22189 states and 25781 transitions. Word has length 254 [2023-11-06 21:15:01,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:01,452 INFO L495 AbstractCegarLoop]: Abstraction has 22189 states and 25781 transitions. [2023-11-06 21:15:01,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:01,452 INFO L276 IsEmpty]: Start isEmpty. Operand 22189 states and 25781 transitions. [2023-11-06 21:15:01,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2023-11-06 21:15:01,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:01,485 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, 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] [2023-11-06 21:15:01,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 21:15:01,485 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:01,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:01,486 INFO L85 PathProgramCache]: Analyzing trace with hash 721693502, now seen corresponding path program 1 times [2023-11-06 21:15:01,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:01,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276235960] [2023-11-06 21:15:01,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:01,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:02,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:02,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276235960] [2023-11-06 21:15:02,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276235960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:02,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:02,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:15:02,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591858481] [2023-11-06 21:15:02,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:02,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:15:02,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:02,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:15:02,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:15:02,346 INFO L87 Difference]: Start difference. First operand 22189 states and 25781 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 2 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:03,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:03,338 INFO L93 Difference]: Finished difference Result 39085 states and 45310 transitions. [2023-11-06 21:15:03,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:15:03,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 2 states have internal predecessors, (262), 0 states have call successors, (0), 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 262 [2023-11-06 21:15:03,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:03,377 INFO L225 Difference]: With dead ends: 39085 [2023-11-06 21:15:03,380 INFO L226 Difference]: Without dead ends: 22189 [2023-11-06 21:15:03,397 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 21:15:03,399 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:03,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 151 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 21:15:03,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22189 states. [2023-11-06 21:15:03,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22189 to 22189. [2023-11-06 21:15:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22189 states, 22188 states have (on average 1.1617991707229134) internal successors, (25778), 22188 states have internal predecessors, (25778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:03,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22189 states to 22189 states and 25778 transitions. [2023-11-06 21:15:03,948 INFO L78 Accepts]: Start accepts. Automaton has 22189 states and 25778 transitions. Word has length 262 [2023-11-06 21:15:03,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:03,950 INFO L495 AbstractCegarLoop]: Abstraction has 22189 states and 25778 transitions. [2023-11-06 21:15:03,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 2 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 22189 states and 25778 transitions. [2023-11-06 21:15:04,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2023-11-06 21:15:04,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:04,026 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:04,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 21:15:04,026 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:04,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:04,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1883142043, now seen corresponding path program 1 times [2023-11-06 21:15:04,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:04,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189214935] [2023-11-06 21:15:04,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:04,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:15:04,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:04,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189214935] [2023-11-06 21:15:04,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189214935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:04,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:04,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:15:04,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802956690] [2023-11-06 21:15:04,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:04,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:15:04,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:04,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:15:04,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:15:04,625 INFO L87 Difference]: Start difference. First operand 22189 states and 25778 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:05,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:05,738 INFO L93 Difference]: Finished difference Result 42760 states and 50059 transitions. [2023-11-06 21:15:05,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:15:05,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 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 269 [2023-11-06 21:15:05,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:05,791 INFO L225 Difference]: With dead ends: 42760 [2023-11-06 21:15:05,791 INFO L226 Difference]: Without dead ends: 27898 [2023-11-06 21:15:05,808 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 21:15:05,809 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 160 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:05,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 123 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 21:15:05,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27898 states. [2023-11-06 21:15:06,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27898 to 25854. [2023-11-06 21:15:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25854 states, 25853 states have (on average 1.1790894673732255) internal successors, (30483), 25853 states have internal predecessors, (30483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:06,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25854 states to 25854 states and 30483 transitions. [2023-11-06 21:15:06,364 INFO L78 Accepts]: Start accepts. Automaton has 25854 states and 30483 transitions. Word has length 269 [2023-11-06 21:15:06,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:06,365 INFO L495 AbstractCegarLoop]: Abstraction has 25854 states and 30483 transitions. [2023-11-06 21:15:06,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:06,365 INFO L276 IsEmpty]: Start isEmpty. Operand 25854 states and 30483 transitions. [2023-11-06 21:15:06,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2023-11-06 21:15:06,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:06,391 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:06,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 21:15:06,391 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:06,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:06,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1633522528, now seen corresponding path program 1 times [2023-11-06 21:15:06,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:06,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175824881] [2023-11-06 21:15:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:06,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-06 21:15:07,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:07,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175824881] [2023-11-06 21:15:07,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175824881] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:07,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:07,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:15:07,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861910504] [2023-11-06 21:15:07,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:07,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:15:07,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:07,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:15:07,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:15:07,052 INFO L87 Difference]: Start difference. First operand 25854 states and 30483 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:08,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:08,265 INFO L93 Difference]: Finished difference Result 53739 states and 63203 transitions. [2023-11-06 21:15:08,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:15:08,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 278 [2023-11-06 21:15:08,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:08,311 INFO L225 Difference]: With dead ends: 53739 [2023-11-06 21:15:08,311 INFO L226 Difference]: Without dead ends: 29311 [2023-11-06 21:15:08,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:15:08,328 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 184 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:08,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 356 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 21:15:08,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29311 states. [2023-11-06 21:15:08,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29311 to 28493. [2023-11-06 21:15:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28493 states, 28492 states have (on average 1.1665379755720904) internal successors, (33237), 28492 states have internal predecessors, (33237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:08,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28493 states to 28493 states and 33237 transitions. [2023-11-06 21:15:08,969 INFO L78 Accepts]: Start accepts. Automaton has 28493 states and 33237 transitions. Word has length 278 [2023-11-06 21:15:08,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:08,969 INFO L495 AbstractCegarLoop]: Abstraction has 28493 states and 33237 transitions. [2023-11-06 21:15:08,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:08,970 INFO L276 IsEmpty]: Start isEmpty. Operand 28493 states and 33237 transitions. [2023-11-06 21:15:08,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2023-11-06 21:15:08,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:08,994 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:08,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 21:15:08,994 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:08,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:08,995 INFO L85 PathProgramCache]: Analyzing trace with hash 355292115, now seen corresponding path program 1 times [2023-11-06 21:15:08,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:08,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063225812] [2023-11-06 21:15:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:08,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:09,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:09,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063225812] [2023-11-06 21:15:09,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063225812] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:09,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:09,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:15:09,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848155707] [2023-11-06 21:15:09,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:09,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:15:09,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:09,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:15:09,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:15:09,652 INFO L87 Difference]: Start difference. First operand 28493 states and 33237 transitions. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:11,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:11,341 INFO L93 Difference]: Finished difference Result 52924 states and 61838 transitions. [2023-11-06 21:15:11,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:15:11,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 290 [2023-11-06 21:15:11,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:11,393 INFO L225 Difference]: With dead ends: 52924 [2023-11-06 21:15:11,393 INFO L226 Difference]: Without dead ends: 29320 [2023-11-06 21:15:11,415 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 21:15:11,416 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 335 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:11,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 82 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 21:15:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29320 states. [2023-11-06 21:15:11,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29320 to 28293. [2023-11-06 21:15:11,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28293 states, 28292 states have (on average 1.1119751166407466) internal successors, (31460), 28292 states have internal predecessors, (31460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28293 states to 28293 states and 31460 transitions. [2023-11-06 21:15:11,966 INFO L78 Accepts]: Start accepts. Automaton has 28293 states and 31460 transitions. Word has length 290 [2023-11-06 21:15:11,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:11,966 INFO L495 AbstractCegarLoop]: Abstraction has 28293 states and 31460 transitions. [2023-11-06 21:15:11,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:11,967 INFO L276 IsEmpty]: Start isEmpty. Operand 28293 states and 31460 transitions. [2023-11-06 21:15:11,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2023-11-06 21:15:11,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:11,988 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-06 21:15:11,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 21:15:11,989 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:11,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:11,989 INFO L85 PathProgramCache]: Analyzing trace with hash -384986369, now seen corresponding path program 1 times [2023-11-06 21:15:11,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:11,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675504069] [2023-11-06 21:15:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:11,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-06 21:15:12,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:12,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675504069] [2023-11-06 21:15:12,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675504069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:12,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:12,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:15:12,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717906126] [2023-11-06 21:15:12,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:12,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:15:12,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:12,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:15:12,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:15:12,637 INFO L87 Difference]: Start difference. First operand 28293 states and 31460 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:13,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:13,696 INFO L93 Difference]: Finished difference Result 66975 states and 74879 transitions. [2023-11-06 21:15:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:15:13,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 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 292 [2023-11-06 21:15:13,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:13,750 INFO L225 Difference]: With dead ends: 66975 [2023-11-06 21:15:13,750 INFO L226 Difference]: Without dead ends: 39905 [2023-11-06 21:15:13,766 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 21:15:13,768 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 200 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:13,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 101 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 21:15:13,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39905 states. [2023-11-06 21:15:14,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39905 to 39686. [2023-11-06 21:15:14,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39686 states, 39685 states have (on average 1.1194405946831296) internal successors, (44425), 39685 states have internal predecessors, (44425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:14,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39686 states to 39686 states and 44425 transitions. [2023-11-06 21:15:14,591 INFO L78 Accepts]: Start accepts. Automaton has 39686 states and 44425 transitions. Word has length 292 [2023-11-06 21:15:14,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:14,592 INFO L495 AbstractCegarLoop]: Abstraction has 39686 states and 44425 transitions. [2023-11-06 21:15:14,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:14,592 INFO L276 IsEmpty]: Start isEmpty. Operand 39686 states and 44425 transitions. [2023-11-06 21:15:14,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2023-11-06 21:15:14,621 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:14,622 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:14,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 21:15:14,622 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:14,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:14,623 INFO L85 PathProgramCache]: Analyzing trace with hash -268199450, now seen corresponding path program 1 times [2023-11-06 21:15:14,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:14,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153051295] [2023-11-06 21:15:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:14,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-06 21:15:15,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:15,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153051295] [2023-11-06 21:15:15,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153051295] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:15,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554776725] [2023-11-06 21:15:15,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:15,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:15,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:15,359 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:15,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:15:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:15,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:15:15,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:16,069 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-11-06 21:15:16,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:15:16,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554776725] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:16,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:15:16,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 21:15:16,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493321522] [2023-11-06 21:15:16,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:16,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:15:16,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:16,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:15:16,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:15:16,074 INFO L87 Difference]: Start difference. First operand 39686 states and 44425 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:17,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:17,033 INFO L93 Difference]: Finished difference Result 72661 states and 81216 transitions. [2023-11-06 21:15:17,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:15:17,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 301 [2023-11-06 21:15:17,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:17,069 INFO L225 Difference]: With dead ends: 72661 [2023-11-06 21:15:17,069 INFO L226 Difference]: Without dead ends: 37858 [2023-11-06 21:15:17,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:15:17,088 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 43 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:17,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 94 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 21:15:17,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37858 states. [2023-11-06 21:15:17,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37858 to 32971. [2023-11-06 21:15:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32971 states, 32970 states have (on average 1.1095238095238096) internal successors, (36581), 32970 states have internal predecessors, (36581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32971 states to 32971 states and 36581 transitions. [2023-11-06 21:15:17,662 INFO L78 Accepts]: Start accepts. Automaton has 32971 states and 36581 transitions. Word has length 301 [2023-11-06 21:15:17,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:17,663 INFO L495 AbstractCegarLoop]: Abstraction has 32971 states and 36581 transitions. [2023-11-06 21:15:17,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:17,663 INFO L276 IsEmpty]: Start isEmpty. Operand 32971 states and 36581 transitions. [2023-11-06 21:15:17,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2023-11-06 21:15:17,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:17,687 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-06 21:15:17,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:17,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 21:15:17,894 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:17,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:17,895 INFO L85 PathProgramCache]: Analyzing trace with hash -768612039, now seen corresponding path program 1 times [2023-11-06 21:15:17,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:17,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028843205] [2023-11-06 21:15:17,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:17,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 131 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:20,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:20,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028843205] [2023-11-06 21:15:20,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028843205] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:20,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778717023] [2023-11-06 21:15:20,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:20,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:20,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:20,383 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:20,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:15:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:20,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:15:20,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-06 21:15:20,849 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:15:20,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778717023] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:20,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:15:20,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-06 21:15:20,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065097948] [2023-11-06 21:15:20,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:20,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:15:20,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:20,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:15:20,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:15:20,855 INFO L87 Difference]: Start difference. First operand 32971 states and 36581 transitions. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 2 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:21,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:21,874 INFO L93 Difference]: Finished difference Result 75903 states and 84381 transitions. [2023-11-06 21:15:21,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:15:21,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 2 states have internal predecessors, (292), 0 states have call successors, (0), 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 320 [2023-11-06 21:15:21,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:21,918 INFO L225 Difference]: With dead ends: 75903 [2023-11-06 21:15:21,918 INFO L226 Difference]: Without dead ends: 43951 [2023-11-06 21:15:21,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:15:21,938 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 143 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:21,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 107 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 21:15:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43951 states. [2023-11-06 21:15:22,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43951 to 42727. [2023-11-06 21:15:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42727 states, 42726 states have (on average 1.1046201376211207) internal successors, (47196), 42726 states have internal predecessors, (47196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42727 states to 42727 states and 47196 transitions. [2023-11-06 21:15:22,525 INFO L78 Accepts]: Start accepts. Automaton has 42727 states and 47196 transitions. Word has length 320 [2023-11-06 21:15:22,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:22,526 INFO L495 AbstractCegarLoop]: Abstraction has 42727 states and 47196 transitions. [2023-11-06 21:15:22,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 2 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:22,526 INFO L276 IsEmpty]: Start isEmpty. Operand 42727 states and 47196 transitions. [2023-11-06 21:15:22,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-11-06 21:15:22,582 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:22,583 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-06 21:15:22,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:22,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 21:15:22,799 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:22,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:22,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1210172478, now seen corresponding path program 1 times [2023-11-06 21:15:22,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:22,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730749327] [2023-11-06 21:15:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:22,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 140 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:15:23,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:23,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730749327] [2023-11-06 21:15:23,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730749327] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:23,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572225938] [2023-11-06 21:15:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:23,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:23,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:23,511 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:23,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:15:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:23,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:15:23,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-06 21:15:24,015 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:15:24,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572225938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:24,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:15:24,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-06 21:15:24,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460515278] [2023-11-06 21:15:24,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:24,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:15:24,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:24,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:15:24,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:15:24,019 INFO L87 Difference]: Start difference. First operand 42727 states and 47196 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:24,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:24,723 INFO L93 Difference]: Finished difference Result 98276 states and 108490 transitions. [2023-11-06 21:15:24,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:15:24,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 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 21:15:24,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:24,815 INFO L225 Difference]: With dead ends: 98276 [2023-11-06 21:15:24,815 INFO L226 Difference]: Without dead ends: 64501 [2023-11-06 21:15:24,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:15:24,838 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 201 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:24,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 480 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:15:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64501 states. [2023-11-06 21:15:25,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64501 to 64499. [2023-11-06 21:15:25,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64499 states, 64498 states have (on average 1.1001736487953115) internal successors, (70959), 64498 states have internal predecessors, (70959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:25,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64499 states to 64499 states and 70959 transitions. [2023-11-06 21:15:25,791 INFO L78 Accepts]: Start accepts. Automaton has 64499 states and 70959 transitions. Word has length 329 [2023-11-06 21:15:25,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:25,792 INFO L495 AbstractCegarLoop]: Abstraction has 64499 states and 70959 transitions. [2023-11-06 21:15:25,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:25,792 INFO L276 IsEmpty]: Start isEmpty. Operand 64499 states and 70959 transitions. [2023-11-06 21:15:25,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2023-11-06 21:15:25,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:25,829 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-06 21:15:25,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 21:15:26,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 21:15:26,035 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:26,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:26,036 INFO L85 PathProgramCache]: Analyzing trace with hash -41426837, now seen corresponding path program 1 times [2023-11-06 21:15:26,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:26,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880462383] [2023-11-06 21:15:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:26,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-11-06 21:15:26,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:26,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880462383] [2023-11-06 21:15:26,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880462383] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:26,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054549545] [2023-11-06 21:15:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:26,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:26,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:26,746 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:26,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:15:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:26,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:15:27,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-11-06 21:15:27,249 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:15:27,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054549545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:27,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:15:27,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 21:15:27,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45147395] [2023-11-06 21:15:27,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:27,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:15:27,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:27,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:15:27,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:15:27,252 INFO L87 Difference]: Start difference. First operand 64499 states and 70959 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:28,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:28,296 INFO L93 Difference]: Finished difference Result 121681 states and 134129 transitions. [2023-11-06 21:15:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:15:28,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 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 333 [2023-11-06 21:15:28,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:28,370 INFO L225 Difference]: With dead ends: 121681 [2023-11-06 21:15:28,370 INFO L226 Difference]: Without dead ends: 58404 [2023-11-06 21:15:28,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:15:28,397 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 76 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:28,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 275 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:15:28,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58404 states. [2023-11-06 21:15:29,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58404 to 58395. [2023-11-06 21:15:29,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58395 states, 58394 states have (on average 1.096071514196664) internal successors, (64004), 58394 states have internal predecessors, (64004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58395 states to 58395 states and 64004 transitions. [2023-11-06 21:15:29,320 INFO L78 Accepts]: Start accepts. Automaton has 58395 states and 64004 transitions. Word has length 333 [2023-11-06 21:15:29,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:29,321 INFO L495 AbstractCegarLoop]: Abstraction has 58395 states and 64004 transitions. [2023-11-06 21:15:29,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:29,321 INFO L276 IsEmpty]: Start isEmpty. Operand 58395 states and 64004 transitions. [2023-11-06 21:15:29,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2023-11-06 21:15:29,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:29,360 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:29,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:29,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 21:15:29,567 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:29,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:29,567 INFO L85 PathProgramCache]: Analyzing trace with hash -31533363, now seen corresponding path program 1 times [2023-11-06 21:15:29,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:29,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028269375] [2023-11-06 21:15:29,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:29,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 163 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-06 21:15:30,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:30,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028269375] [2023-11-06 21:15:30,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028269375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:30,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360198027] [2023-11-06 21:15:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:30,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:30,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:30,208 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:30,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:15:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:30,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:15:30,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-06 21:15:30,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:15:30,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360198027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:30,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:15:30,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-06 21:15:30,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993258594] [2023-11-06 21:15:30,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:30,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:15:30,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:30,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:15:30,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:15:30,721 INFO L87 Difference]: Start difference. First operand 58395 states and 64004 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:31,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:31,575 INFO L93 Difference]: Finished difference Result 153824 states and 168546 transitions. [2023-11-06 21:15:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:15:31,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 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 343 [2023-11-06 21:15:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:31,680 INFO L225 Difference]: With dead ends: 153824 [2023-11-06 21:15:31,681 INFO L226 Difference]: Without dead ends: 96854 [2023-11-06 21:15:31,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 342 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 21:15:31,717 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 179 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:31,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 474 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:15:31,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96854 states. [2023-11-06 21:15:33,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96854 to 96841. [2023-11-06 21:15:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96841 states, 96840 states have (on average 1.094568360181743) internal successors, (105998), 96840 states have internal predecessors, (105998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:33,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96841 states to 96841 states and 105998 transitions. [2023-11-06 21:15:33,610 INFO L78 Accepts]: Start accepts. Automaton has 96841 states and 105998 transitions. Word has length 343 [2023-11-06 21:15:33,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:33,611 INFO L495 AbstractCegarLoop]: Abstraction has 96841 states and 105998 transitions. [2023-11-06 21:15:33,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:33,611 INFO L276 IsEmpty]: Start isEmpty. Operand 96841 states and 105998 transitions. [2023-11-06 21:15:33,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2023-11-06 21:15:33,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:33,634 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:33,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:33,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 21:15:33,835 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:33,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:33,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1352915642, now seen corresponding path program 1 times [2023-11-06 21:15:33,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:33,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209481257] [2023-11-06 21:15:33,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:33,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 136 proven. 6 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-06 21:15:34,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:34,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209481257] [2023-11-06 21:15:34,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209481257] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:34,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281345308] [2023-11-06 21:15:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:34,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:34,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:34,339 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:34,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:15:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:34,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:15:34,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2023-11-06 21:15:34,870 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:15:34,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281345308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:34,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:15:34,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 21:15:34,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229037679] [2023-11-06 21:15:34,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:34,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:15:34,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:34,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:15:34,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:15:34,873 INFO L87 Difference]: Start difference. First operand 96841 states and 105998 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:37,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:37,168 INFO L93 Difference]: Finished difference Result 185191 states and 202528 transitions. [2023-11-06 21:15:37,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:15:37,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 352 [2023-11-06 21:15:37,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:37,265 INFO L225 Difference]: With dead ends: 185191 [2023-11-06 21:15:37,265 INFO L226 Difference]: Without dead ends: 88555 [2023-11-06 21:15:37,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:15:37,299 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 37 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:37,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 325 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 21:15:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88555 states. [2023-11-06 21:15:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88555 to 88508. [2023-11-06 21:15:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88508 states, 88507 states have (on average 1.0882077123843312) internal successors, (96314), 88507 states have internal predecessors, (96314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88508 states to 88508 states and 96314 transitions. [2023-11-06 21:15:38,958 INFO L78 Accepts]: Start accepts. Automaton has 88508 states and 96314 transitions. Word has length 352 [2023-11-06 21:15:38,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:38,960 INFO L495 AbstractCegarLoop]: Abstraction has 88508 states and 96314 transitions. [2023-11-06 21:15:38,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:38,960 INFO L276 IsEmpty]: Start isEmpty. Operand 88508 states and 96314 transitions. [2023-11-06 21:15:38,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2023-11-06 21:15:38,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:38,986 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:38,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:39,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:39,187 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:39,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:39,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1362709593, now seen corresponding path program 1 times [2023-11-06 21:15:39,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:39,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421731482] [2023-11-06 21:15:39,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:39,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 213 proven. 58 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:15:41,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:41,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421731482] [2023-11-06 21:15:41,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421731482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:15:41,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565894712] [2023-11-06 21:15:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:41,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:41,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:41,514 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:41,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:15:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:41,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:15:41,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:15:42,201 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:15:42,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565894712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:42,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:15:42,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-06 21:15:42,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949609301] [2023-11-06 21:15:42,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:42,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:15:42,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:42,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:15:42,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:15:42,205 INFO L87 Difference]: Start difference. First operand 88508 states and 96314 transitions. Second operand has 4 states, 4 states have (on average 86.0) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:43,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:43,991 INFO L93 Difference]: Finished difference Result 181349 states and 197498 transitions. [2023-11-06 21:15:43,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:15:43,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 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 373 [2023-11-06 21:15:43,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:44,084 INFO L225 Difference]: With dead ends: 181349 [2023-11-06 21:15:44,085 INFO L226 Difference]: Without dead ends: 94264 [2023-11-06 21:15:44,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:15:44,124 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 291 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:44,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 103 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 21:15:44,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94264 states. [2023-11-06 21:15:45,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94264 to 90739. [2023-11-06 21:15:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90739 states, 90738 states have (on average 1.079657916198285) internal successors, (97966), 90738 states have internal predecessors, (97966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90739 states to 90739 states and 97966 transitions. [2023-11-06 21:15:45,531 INFO L78 Accepts]: Start accepts. Automaton has 90739 states and 97966 transitions. Word has length 373 [2023-11-06 21:15:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:45,531 INFO L495 AbstractCegarLoop]: Abstraction has 90739 states and 97966 transitions. [2023-11-06 21:15:45,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:15:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 90739 states and 97966 transitions. [2023-11-06 21:15:45,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2023-11-06 21:15:45,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:45,559 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:15:45,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:45,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_171df3c2-5502-4c00-9263-170fabd9d6a4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:45,760 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:45,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:45,760 INFO L85 PathProgramCache]: Analyzing trace with hash -755950805, now seen corresponding path program 1 times [2023-11-06 21:15:45,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:45,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563228990] [2023-11-06 21:15:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:45,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat