./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem11_label24.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label24.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 63c3a28a771a7642d2d01d4b50ea8f0914adef37135dc9c64a20524a1e6d797b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:20:15,831 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:20:15,901 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:20:15,907 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:20:15,907 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:20:15,933 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:20:15,934 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:20:15,934 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:20:15,935 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:20:15,936 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:20:15,937 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:20:15,938 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:20:15,938 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:20:15,939 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:20:15,940 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:20:15,940 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:20:15,941 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:20:15,942 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:20:15,942 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:20:15,943 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:20:15,944 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:20:15,945 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:20:15,945 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:20:15,946 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:20:15,947 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:20:15,947 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:20:15,948 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:20:15,949 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:20:15,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:20:15,950 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:20:15,951 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:20:15,951 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:20:15,952 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:20:15,952 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:20:15,953 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:20:15,953 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:20:15,954 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:20:15,954 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:20:15,954 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:20:15,955 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_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63c3a28a771a7642d2d01d4b50ea8f0914adef37135dc9c64a20524a1e6d797b [2023-11-12 02:20:16,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:20:16,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:20:16,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:20:16,304 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:20:16,305 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:20:16,307 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/eca-rers2012/Problem11_label24.c [2023-11-12 02:20:19,409 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:20:19,760 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:20:19,762 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/sv-benchmarks/c/eca-rers2012/Problem11_label24.c [2023-11-12 02:20:19,784 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/data/bbfdf114b/f6fa04fb944d4d8fa7dc5a93bd32c19c/FLAG413e5fe56 [2023-11-12 02:20:19,803 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/data/bbfdf114b/f6fa04fb944d4d8fa7dc5a93bd32c19c [2023-11-12 02:20:19,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:20:19,812 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:20:19,813 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:20:19,813 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:20:19,820 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:20:19,823 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:20:19" (1/1) ... [2023-11-12 02:20:19,824 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18eb14b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:19, skipping insertion in model container [2023-11-12 02:20:19,824 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:20:19" (1/1) ... [2023-11-12 02:20:19,908 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:20:20,195 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_180caf4f-9bf3-4ac1-adb8-d157371dab55/sv-benchmarks/c/eca-rers2012/Problem11_label24.c[7451,7464] [2023-11-12 02:20:20,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:20:20,505 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:20:20,569 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_180caf4f-9bf3-4ac1-adb8-d157371dab55/sv-benchmarks/c/eca-rers2012/Problem11_label24.c[7451,7464] [2023-11-12 02:20:20,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:20:20,755 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:20:20,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:20 WrapperNode [2023-11-12 02:20:20,756 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:20:20,758 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:20:20,758 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:20:20,758 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:20:20,766 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:20" (1/1) ... [2023-11-12 02:20:20,800 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:20" (1/1) ... [2023-11-12 02:20:20,931 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1000 [2023-11-12 02:20:20,931 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:20:20,932 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:20:20,932 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:20:20,932 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:20:20,943 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:20" (1/1) ... [2023-11-12 02:20:20,943 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:20" (1/1) ... [2023-11-12 02:20:20,953 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:20" (1/1) ... [2023-11-12 02:20:20,954 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:20" (1/1) ... [2023-11-12 02:20:21,010 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:20" (1/1) ... [2023-11-12 02:20:21,032 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:20" (1/1) ... [2023-11-12 02:20:21,056 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:20" (1/1) ... [2023-11-12 02:20:21,065 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:20" (1/1) ... [2023-11-12 02:20:21,076 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:20:21,077 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:20:21,078 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:20:21,078 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:20:21,079 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:20" (1/1) ... [2023-11-12 02:20:21,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:20:21,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:21,113 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:20:21,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:20:21,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:20:21,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:20:21,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:20:21,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:20:21,220 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:20:21,223 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:20:23,264 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:20:23,281 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:20:23,281 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:20:23,285 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:20:23 BoogieIcfgContainer [2023-11-12 02:20:23,285 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:20:23,289 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:20:23,289 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:20:23,292 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:20:23,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:20:19" (1/3) ... [2023-11-12 02:20:23,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54021f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:20:23, skipping insertion in model container [2023-11-12 02:20:23,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:20:20" (2/3) ... [2023-11-12 02:20:23,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54021f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:20:23, skipping insertion in model container [2023-11-12 02:20:23,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:20:23" (3/3) ... [2023-11-12 02:20:23,298 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label24.c [2023-11-12 02:20:23,318 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:20:23,318 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:20:23,398 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:20:23,404 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@44994bd7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:20:23,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:20:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:23,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-12 02:20:23,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:23,426 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] [2023-11-12 02:20:23,427 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:23,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:23,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2122806209, now seen corresponding path program 1 times [2023-11-12 02:20:23,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:23,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157611150] [2023-11-12 02:20:23,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:23,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:23,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:23,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157611150] [2023-11-12 02:20:23,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157611150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:23,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:23,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:20:23,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009153552] [2023-11-12 02:20:23,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:23,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:20:23,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:24,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:20:24,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:24,009 INFO L87 Difference]: Start difference. First operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 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 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:25,487 INFO L93 Difference]: Finished difference Result 776 states and 1363 transitions. [2023-11-12 02:20:25,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:20:25,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2023-11-12 02:20:25,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:25,504 INFO L225 Difference]: With dead ends: 776 [2023-11-12 02:20:25,504 INFO L226 Difference]: Without dead ends: 413 [2023-11-12 02:20:25,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:25,512 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 176 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:25,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 196 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-12 02:20:25,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2023-11-12 02:20:25,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 411. [2023-11-12 02:20:25,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.4585365853658536) internal successors, (598), 410 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:25,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 598 transitions. [2023-11-12 02:20:25,588 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 598 transitions. Word has length 51 [2023-11-12 02:20:25,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:25,589 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 598 transitions. [2023-11-12 02:20:25,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:25,589 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 598 transitions. [2023-11-12 02:20:25,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-12 02:20:25,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:25,595 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:25,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:20:25,596 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:25,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:25,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1424628072, now seen corresponding path program 1 times [2023-11-12 02:20:25,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:25,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177417213] [2023-11-12 02:20:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:25,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:25,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:25,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177417213] [2023-11-12 02:20:25,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177417213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:25,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:25,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:20:25,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494947437] [2023-11-12 02:20:25,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:25,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:20:25,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:25,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:20:25,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:25,896 INFO L87 Difference]: Start difference. First operand 411 states and 598 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:26,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:26,913 INFO L93 Difference]: Finished difference Result 1209 states and 1765 transitions. [2023-11-12 02:20:26,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:20:26,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2023-11-12 02:20:26,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:26,919 INFO L225 Difference]: With dead ends: 1209 [2023-11-12 02:20:26,920 INFO L226 Difference]: Without dead ends: 800 [2023-11-12 02:20:26,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:26,923 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 144 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:26,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 120 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:20:26,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2023-11-12 02:20:26,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 787. [2023-11-12 02:20:26,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 1.3854961832061068) internal successors, (1089), 786 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1089 transitions. [2023-11-12 02:20:26,990 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1089 transitions. Word has length 119 [2023-11-12 02:20:26,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:26,990 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 1089 transitions. [2023-11-12 02:20:26,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:26,991 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1089 transitions. [2023-11-12 02:20:26,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-12 02:20:26,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:26,997 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:26,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:20:26,997 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:26,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:26,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1033925576, now seen corresponding path program 1 times [2023-11-12 02:20:26,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:26,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720776360] [2023-11-12 02:20:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:26,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:27,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:27,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720776360] [2023-11-12 02:20:27,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720776360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:27,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:27,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:20:27,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580259811] [2023-11-12 02:20:27,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:27,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:20:27,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:27,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:20:27,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:27,450 INFO L87 Difference]: Start difference. First operand 787 states and 1089 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:28,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:28,431 INFO L93 Difference]: Finished difference Result 1942 states and 2631 transitions. [2023-11-12 02:20:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:20:28,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2023-11-12 02:20:28,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:28,442 INFO L225 Difference]: With dead ends: 1942 [2023-11-12 02:20:28,442 INFO L226 Difference]: Without dead ends: 1157 [2023-11-12 02:20:28,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:28,451 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 120 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:28,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 190 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:20:28,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2023-11-12 02:20:28,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1156. [2023-11-12 02:20:28,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 1.277922077922078) internal successors, (1476), 1155 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1476 transitions. [2023-11-12 02:20:28,508 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1476 transitions. Word has length 120 [2023-11-12 02:20:28,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:28,512 INFO L495 AbstractCegarLoop]: Abstraction has 1156 states and 1476 transitions. [2023-11-12 02:20:28,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:28,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1476 transitions. [2023-11-12 02:20:28,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-12 02:20:28,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:28,516 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:28,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:20:28,517 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:28,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:28,518 INFO L85 PathProgramCache]: Analyzing trace with hash -289166940, now seen corresponding path program 1 times [2023-11-12 02:20:28,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:28,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089668224] [2023-11-12 02:20:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:28,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:28,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:28,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089668224] [2023-11-12 02:20:28,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089668224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:28,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:28,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:20:28,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097886149] [2023-11-12 02:20:28,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:28,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:20:28,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:28,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:20:28,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:28,831 INFO L87 Difference]: Start difference. First operand 1156 states and 1476 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:29,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:29,933 INFO L93 Difference]: Finished difference Result 2691 states and 3515 transitions. [2023-11-12 02:20:29,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:20:29,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2023-11-12 02:20:29,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:29,945 INFO L225 Difference]: With dead ends: 2691 [2023-11-12 02:20:29,945 INFO L226 Difference]: Without dead ends: 1721 [2023-11-12 02:20:29,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:29,949 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 155 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:29,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 336 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:20:29,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2023-11-12 02:20:29,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1528. [2023-11-12 02:20:29,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 1.261296660117878) internal successors, (1926), 1527 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:30,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 1926 transitions. [2023-11-12 02:20:30,002 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 1926 transitions. Word has length 163 [2023-11-12 02:20:30,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:30,003 INFO L495 AbstractCegarLoop]: Abstraction has 1528 states and 1926 transitions. [2023-11-12 02:20:30,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:30,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 1926 transitions. [2023-11-12 02:20:30,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-12 02:20:30,007 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:30,008 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:30,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:20:30,008 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:30,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:30,009 INFO L85 PathProgramCache]: Analyzing trace with hash -933543605, now seen corresponding path program 1 times [2023-11-12 02:20:30,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:30,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59627127] [2023-11-12 02:20:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:30,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:30,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:30,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59627127] [2023-11-12 02:20:30,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59627127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:30,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:30,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:20:30,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947490045] [2023-11-12 02:20:30,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:30,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:20:30,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:30,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:20:30,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:30,235 INFO L87 Difference]: Start difference. First operand 1528 states and 1926 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:31,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:31,224 INFO L93 Difference]: Finished difference Result 4158 states and 5316 transitions. [2023-11-12 02:20:31,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:20:31,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2023-11-12 02:20:31,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:31,240 INFO L225 Difference]: With dead ends: 4158 [2023-11-12 02:20:31,240 INFO L226 Difference]: Without dead ends: 2632 [2023-11-12 02:20:31,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:31,244 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 115 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:31,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 155 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:20:31,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2023-11-12 02:20:31,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2448. [2023-11-12 02:20:31,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 1.2174090723334696) internal successors, (2979), 2447 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:31,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 2979 transitions. [2023-11-12 02:20:31,324 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 2979 transitions. Word has length 178 [2023-11-12 02:20:31,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:31,324 INFO L495 AbstractCegarLoop]: Abstraction has 2448 states and 2979 transitions. [2023-11-12 02:20:31,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:31,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 2979 transitions. [2023-11-12 02:20:31,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-12 02:20:31,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:31,329 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:31,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:20:31,329 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:31,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:31,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1329847317, now seen corresponding path program 1 times [2023-11-12 02:20:31,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:31,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533357694] [2023-11-12 02:20:31,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:31,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-12 02:20:31,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:31,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533357694] [2023-11-12 02:20:31,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533357694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:31,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:31,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:20:31,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919848873] [2023-11-12 02:20:31,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:31,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:20:31,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:31,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:20:31,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:31,587 INFO L87 Difference]: Start difference. First operand 2448 states and 2979 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:32,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:32,471 INFO L93 Difference]: Finished difference Result 5452 states and 6620 transitions. [2023-11-12 02:20:32,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:20:32,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 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 [2023-11-12 02:20:32,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:32,487 INFO L225 Difference]: With dead ends: 5452 [2023-11-12 02:20:32,488 INFO L226 Difference]: Without dead ends: 3006 [2023-11-12 02:20:32,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:32,492 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 75 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:32,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 154 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:20:32,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2023-11-12 02:20:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 3005. [2023-11-12 02:20:32,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3005 states, 3004 states have (on average 1.2113848202396804) internal successors, (3639), 3004 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3005 states to 3005 states and 3639 transitions. [2023-11-12 02:20:32,586 INFO L78 Accepts]: Start accepts. Automaton has 3005 states and 3639 transitions. Word has length 194 [2023-11-12 02:20:32,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:32,588 INFO L495 AbstractCegarLoop]: Abstraction has 3005 states and 3639 transitions. [2023-11-12 02:20:32,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:32,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3005 states and 3639 transitions. [2023-11-12 02:20:32,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2023-11-12 02:20:32,598 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:32,599 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 02:20:32,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:20:32,599 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:32,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:32,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1440418757, now seen corresponding path program 1 times [2023-11-12 02:20:32,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:32,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731258804] [2023-11-12 02:20:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:32,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:33,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:33,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731258804] [2023-11-12 02:20:33,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731258804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:33,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:33,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:20:33,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489039062] [2023-11-12 02:20:33,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:33,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:20:33,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:33,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:20:33,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:20:33,293 INFO L87 Difference]: Start difference. First operand 3005 states and 3639 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:35,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:35,290 INFO L93 Difference]: Finished difference Result 8783 states and 10795 transitions. [2023-11-12 02:20:35,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:20:35,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2023-11-12 02:20:35,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:35,323 INFO L225 Difference]: With dead ends: 8783 [2023-11-12 02:20:35,324 INFO L226 Difference]: Without dead ends: 5780 [2023-11-12 02:20:35,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:20:35,332 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 319 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:35,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 119 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-12 02:20:35,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5780 states. [2023-11-12 02:20:35,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5780 to 5404. [2023-11-12 02:20:35,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5404 states, 5403 states have (on average 1.2121043864519712) internal successors, (6549), 5403 states have internal predecessors, (6549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:35,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5404 states to 5404 states and 6549 transitions. [2023-11-12 02:20:35,496 INFO L78 Accepts]: Start accepts. Automaton has 5404 states and 6549 transitions. Word has length 232 [2023-11-12 02:20:35,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:35,497 INFO L495 AbstractCegarLoop]: Abstraction has 5404 states and 6549 transitions. [2023-11-12 02:20:35,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:35,497 INFO L276 IsEmpty]: Start isEmpty. Operand 5404 states and 6549 transitions. [2023-11-12 02:20:35,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2023-11-12 02:20:35,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:35,503 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 02:20:35,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:20:35,504 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:35,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:35,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1400544816, now seen corresponding path program 1 times [2023-11-12 02:20:35,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:35,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522502199] [2023-11-12 02:20:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:35,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-12 02:20:35,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:35,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522502199] [2023-11-12 02:20:35,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522502199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:35,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:35,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:20:35,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317765787] [2023-11-12 02:20:35,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:35,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:20:35,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:35,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:20:35,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:35,874 INFO L87 Difference]: Start difference. First operand 5404 states and 6549 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:37,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:37,036 INFO L93 Difference]: Finished difference Result 11919 states and 14623 transitions. [2023-11-12 02:20:37,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:20:37,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 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 233 [2023-11-12 02:20:37,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:37,070 INFO L225 Difference]: With dead ends: 11919 [2023-11-12 02:20:37,070 INFO L226 Difference]: Without dead ends: 6885 [2023-11-12 02:20:37,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:37,078 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 146 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:37,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 390 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 02:20:37,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6885 states. [2023-11-12 02:20:37,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6885 to 6692. [2023-11-12 02:20:37,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6692 states, 6691 states have (on average 1.1927962935286205) internal successors, (7981), 6691 states have internal predecessors, (7981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:37,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6692 states to 6692 states and 7981 transitions. [2023-11-12 02:20:37,235 INFO L78 Accepts]: Start accepts. Automaton has 6692 states and 7981 transitions. Word has length 233 [2023-11-12 02:20:37,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:37,235 INFO L495 AbstractCegarLoop]: Abstraction has 6692 states and 7981 transitions. [2023-11-12 02:20:37,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 6692 states and 7981 transitions. [2023-11-12 02:20:37,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2023-11-12 02:20:37,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:37,242 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-12 02:20:37,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:20:37,243 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:37,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:37,244 INFO L85 PathProgramCache]: Analyzing trace with hash 826529202, now seen corresponding path program 1 times [2023-11-12 02:20:37,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:37,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212919013] [2023-11-12 02:20:37,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:37,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:37,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:37,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212919013] [2023-11-12 02:20:37,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212919013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:37,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:37,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:20:37,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935246433] [2023-11-12 02:20:37,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:37,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:20:37,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:37,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:20:37,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:20:37,885 INFO L87 Difference]: Start difference. First operand 6692 states and 7981 transitions. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:39,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:39,819 INFO L93 Difference]: Finished difference Result 14861 states and 17819 transitions. [2023-11-12 02:20:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:20:39,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2023-11-12 02:20:39,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:39,858 INFO L225 Difference]: With dead ends: 14861 [2023-11-12 02:20:39,858 INFO L226 Difference]: Without dead ends: 8539 [2023-11-12 02:20:39,867 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 [2023-11-12 02:20:39,868 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 253 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:39,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 141 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-12 02:20:39,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8539 states. [2023-11-12 02:20:40,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8539 to 8534. [2023-11-12 02:20:40,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8534 states, 8533 states have (on average 1.1736786593226298) internal successors, (10015), 8533 states have internal predecessors, (10015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:40,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8534 states to 8534 states and 10015 transitions. [2023-11-12 02:20:40,095 INFO L78 Accepts]: Start accepts. Automaton has 8534 states and 10015 transitions. Word has length 243 [2023-11-12 02:20:40,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:40,097 INFO L495 AbstractCegarLoop]: Abstraction has 8534 states and 10015 transitions. [2023-11-12 02:20:40,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:40,098 INFO L276 IsEmpty]: Start isEmpty. Operand 8534 states and 10015 transitions. [2023-11-12 02:20:40,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-11-12 02:20:40,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:40,105 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 02:20:40,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:20:40,106 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:40,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:40,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1535621630, now seen corresponding path program 1 times [2023-11-12 02:20:40,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:40,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799040265] [2023-11-12 02:20:40,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:40,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2023-11-12 02:20:40,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:40,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799040265] [2023-11-12 02:20:40,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799040265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:40,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:40,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:20:40,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141875037] [2023-11-12 02:20:40,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:40,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:20:40,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:40,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:20:40,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:40,490 INFO L87 Difference]: Start difference. First operand 8534 states and 10015 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:41,626 INFO L93 Difference]: Finished difference Result 18740 states and 22056 transitions. [2023-11-12 02:20:41,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:20:41,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 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 253 [2023-11-12 02:20:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:41,649 INFO L225 Difference]: With dead ends: 18740 [2023-11-12 02:20:41,649 INFO L226 Difference]: Without dead ends: 10576 [2023-11-12 02:20:41,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:41,661 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 151 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:41,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 190 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:20:41,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10576 states. [2023-11-12 02:20:41,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10576 to 10190. [2023-11-12 02:20:41,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10190 states, 10189 states have (on average 1.1690057905584454) internal successors, (11911), 10189 states have internal predecessors, (11911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:41,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10190 states to 10190 states and 11911 transitions. [2023-11-12 02:20:41,831 INFO L78 Accepts]: Start accepts. Automaton has 10190 states and 11911 transitions. Word has length 253 [2023-11-12 02:20:41,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:41,832 INFO L495 AbstractCegarLoop]: Abstraction has 10190 states and 11911 transitions. [2023-11-12 02:20:41,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:41,833 INFO L276 IsEmpty]: Start isEmpty. Operand 10190 states and 11911 transitions. [2023-11-12 02:20:41,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2023-11-12 02:20:41,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:41,842 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 02:20:41,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:20:41,842 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:41,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:41,843 INFO L85 PathProgramCache]: Analyzing trace with hash 943642801, now seen corresponding path program 1 times [2023-11-12 02:20:41,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:41,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668027719] [2023-11-12 02:20:41,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:41,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-12 02:20:42,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:42,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668027719] [2023-11-12 02:20:42,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668027719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:42,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:42,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:20:42,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921115537] [2023-11-12 02:20:42,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:42,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:20:42,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:42,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:20:42,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:42,203 INFO L87 Difference]: Start difference. First operand 10190 states and 11911 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:43,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:43,372 INFO L93 Difference]: Finished difference Result 20567 states and 24033 transitions. [2023-11-12 02:20:43,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:20:43,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2023-11-12 02:20:43,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:43,396 INFO L225 Difference]: With dead ends: 20567 [2023-11-12 02:20:43,396 INFO L226 Difference]: Without dead ends: 10563 [2023-11-12 02:20:43,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:43,409 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 150 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:43,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 361 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 02:20:43,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10563 states. [2023-11-12 02:20:43,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10563 to 10557. [2023-11-12 02:20:43,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10557 states, 10556 states have (on average 1.139920424403183) internal successors, (12033), 10556 states have internal predecessors, (12033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10557 states to 10557 states and 12033 transitions. [2023-11-12 02:20:43,589 INFO L78 Accepts]: Start accepts. Automaton has 10557 states and 12033 transitions. Word has length 281 [2023-11-12 02:20:43,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:43,590 INFO L495 AbstractCegarLoop]: Abstraction has 10557 states and 12033 transitions. [2023-11-12 02:20:43,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 10557 states and 12033 transitions. [2023-11-12 02:20:43,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-11-12 02:20:43,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:43,603 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:43,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 02:20:43,603 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:43,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:43,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2146355781, now seen corresponding path program 1 times [2023-11-12 02:20:43,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:43,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140263300] [2023-11-12 02:20:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:43,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-12 02:20:44,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:44,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140263300] [2023-11-12 02:20:44,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140263300] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:44,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:44,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:20:44,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247591825] [2023-11-12 02:20:44,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:44,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:20:44,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:44,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:20:44,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:44,069 INFO L87 Difference]: Start difference. First operand 10557 states and 12033 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) [2023-11-12 02:20:45,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:45,110 INFO L93 Difference]: Finished difference Result 23886 states and 27410 transitions. [2023-11-12 02:20:45,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:20:45,113 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 314 [2023-11-12 02:20:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:45,141 INFO L225 Difference]: With dead ends: 23886 [2023-11-12 02:20:45,141 INFO L226 Difference]: Without dead ends: 13699 [2023-11-12 02:20:45,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:45,154 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 142 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:45,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 135 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:20:45,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13699 states. [2023-11-12 02:20:45,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13699 to 13694. [2023-11-12 02:20:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13694 states, 13693 states have (on average 1.1337179580807712) internal successors, (15524), 13693 states have internal predecessors, (15524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13694 states to 13694 states and 15524 transitions. [2023-11-12 02:20:45,440 INFO L78 Accepts]: Start accepts. Automaton has 13694 states and 15524 transitions. Word has length 314 [2023-11-12 02:20:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:45,441 INFO L495 AbstractCegarLoop]: Abstraction has 13694 states and 15524 transitions. [2023-11-12 02:20:45,441 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) [2023-11-12 02:20:45,441 INFO L276 IsEmpty]: Start isEmpty. Operand 13694 states and 15524 transitions. [2023-11-12 02:20:45,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2023-11-12 02:20:45,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:45,456 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:45,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 02:20:45,456 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:45,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:45,457 INFO L85 PathProgramCache]: Analyzing trace with hash 263747274, now seen corresponding path program 1 times [2023-11-12 02:20:45,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:45,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306352775] [2023-11-12 02:20:45,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:45,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 304 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-12 02:20:45,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:45,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306352775] [2023-11-12 02:20:45,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306352775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:45,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:45,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:20:45,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523673051] [2023-11-12 02:20:45,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:45,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:20:45,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:45,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:20:45,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:45,958 INFO L87 Difference]: Start difference. First operand 13694 states and 15524 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:47,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:47,132 INFO L93 Difference]: Finished difference Result 30517 states and 34553 transitions. [2023-11-12 02:20:47,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:20:47,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 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 322 [2023-11-12 02:20:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:47,169 INFO L225 Difference]: With dead ends: 30517 [2023-11-12 02:20:47,170 INFO L226 Difference]: Without dead ends: 17193 [2023-11-12 02:20:47,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:47,185 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 156 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:47,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 73 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:20:47,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17193 states. [2023-11-12 02:20:47,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17193 to 17190. [2023-11-12 02:20:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17190 states, 17189 states have (on average 1.1226365698993543) internal successors, (19297), 17189 states have internal predecessors, (19297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17190 states to 17190 states and 19297 transitions. [2023-11-12 02:20:47,442 INFO L78 Accepts]: Start accepts. Automaton has 17190 states and 19297 transitions. Word has length 322 [2023-11-12 02:20:47,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:47,443 INFO L495 AbstractCegarLoop]: Abstraction has 17190 states and 19297 transitions. [2023-11-12 02:20:47,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand 17190 states and 19297 transitions. [2023-11-12 02:20:47,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-11-12 02:20:47,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:47,458 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:47,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 02:20:47,459 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:47,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:47,459 INFO L85 PathProgramCache]: Analyzing trace with hash -379447870, now seen corresponding path program 1 times [2023-11-12 02:20:47,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:47,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562792935] [2023-11-12 02:20:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:47,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 227 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:20:48,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:48,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562792935] [2023-11-12 02:20:48,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562792935] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:20:48,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144102879] [2023-11-12 02:20:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:48,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:20:48,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:20:48,734 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:20:48,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:20:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:48,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:20:48,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:20:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-12 02:20:49,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:20:49,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144102879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:49,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:20:49,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-12 02:20:49,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604976505] [2023-11-12 02:20:49,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:49,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:20:49,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:49,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:20:49,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:20:49,242 INFO L87 Difference]: Start difference. First operand 17190 states and 19297 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:50,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:50,310 INFO L93 Difference]: Finished difference Result 35504 states and 40039 transitions. [2023-11-12 02:20:50,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:20:50,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 324 [2023-11-12 02:20:50,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:50,334 INFO L225 Difference]: With dead ends: 35504 [2023-11-12 02:20:50,335 INFO L226 Difference]: Without dead ends: 18684 [2023-11-12 02:20:50,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:20:50,342 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 137 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:50,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 359 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:20:50,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18684 states. [2023-11-12 02:20:50,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18684 to 18676. [2023-11-12 02:20:50,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18676 states, 18675 states have (on average 1.121178045515395) internal successors, (20938), 18675 states have internal predecessors, (20938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18676 states to 18676 states and 20938 transitions. [2023-11-12 02:20:50,597 INFO L78 Accepts]: Start accepts. Automaton has 18676 states and 20938 transitions. Word has length 324 [2023-11-12 02:20:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:50,598 INFO L495 AbstractCegarLoop]: Abstraction has 18676 states and 20938 transitions. [2023-11-12 02:20:50,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 18676 states and 20938 transitions. [2023-11-12 02:20:50,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2023-11-12 02:20:50,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:50,608 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:50,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 02:20:50,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:20:50,824 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:50,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:50,824 INFO L85 PathProgramCache]: Analyzing trace with hash -56733327, now seen corresponding path program 1 times [2023-11-12 02:20:50,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:50,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299977269] [2023-11-12 02:20:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:50,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-12 02:20:51,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:51,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299977269] [2023-11-12 02:20:51,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299977269] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:51,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:51,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:20:51,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786933662] [2023-11-12 02:20:51,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:51,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:20:51,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:51,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:20:51,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:51,119 INFO L87 Difference]: Start difference. First operand 18676 states and 20938 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:52,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:52,085 INFO L93 Difference]: Finished difference Result 40109 states and 44936 transitions. [2023-11-12 02:20:52,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:20:52,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 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 326 [2023-11-12 02:20:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:52,123 INFO L225 Difference]: With dead ends: 40109 [2023-11-12 02:20:52,124 INFO L226 Difference]: Without dead ends: 21803 [2023-11-12 02:20:52,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:52,136 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 168 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:52,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 155 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:20:52,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21803 states. [2023-11-12 02:20:52,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21803 to 14439. [2023-11-12 02:20:52,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14439 states, 14438 states have (on average 1.13159717412384) internal successors, (16338), 14438 states have internal predecessors, (16338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:52,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14439 states to 14439 states and 16338 transitions. [2023-11-12 02:20:52,397 INFO L78 Accepts]: Start accepts. Automaton has 14439 states and 16338 transitions. Word has length 326 [2023-11-12 02:20:52,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:52,398 INFO L495 AbstractCegarLoop]: Abstraction has 14439 states and 16338 transitions. [2023-11-12 02:20:52,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:52,399 INFO L276 IsEmpty]: Start isEmpty. Operand 14439 states and 16338 transitions. [2023-11-12 02:20:52,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2023-11-12 02:20:52,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:52,408 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 02:20:52,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-12 02:20:52,408 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:52,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:52,409 INFO L85 PathProgramCache]: Analyzing trace with hash 234214298, now seen corresponding path program 1 times [2023-11-12 02:20:52,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:52,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594915589] [2023-11-12 02:20:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:52,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-12 02:20:52,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:52,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594915589] [2023-11-12 02:20:52,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594915589] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:52,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:52,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:20:52,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414582610] [2023-11-12 02:20:52,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:52,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:20:52,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:52,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:20:52,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:52,685 INFO L87 Difference]: Start difference. First operand 14439 states and 16338 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:53,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:53,261 INFO L93 Difference]: Finished difference Result 28500 states and 32286 transitions. [2023-11-12 02:20:53,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:20:53,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 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 [2023-11-12 02:20:53,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:53,278 INFO L225 Difference]: With dead ends: 28500 [2023-11-12 02:20:53,278 INFO L226 Difference]: Without dead ends: 14431 [2023-11-12 02:20:53,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:53,287 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 189 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:53,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 40 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:20:53,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14431 states. [2023-11-12 02:20:53,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14431 to 14428. [2023-11-12 02:20:53,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14428 states, 14427 states have (on average 1.1309350523324322) internal successors, (16316), 14427 states have internal predecessors, (16316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14428 states to 14428 states and 16316 transitions. [2023-11-12 02:20:53,492 INFO L78 Accepts]: Start accepts. Automaton has 14428 states and 16316 transitions. Word has length 333 [2023-11-12 02:20:53,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:53,493 INFO L495 AbstractCegarLoop]: Abstraction has 14428 states and 16316 transitions. [2023-11-12 02:20:53,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:53,494 INFO L276 IsEmpty]: Start isEmpty. Operand 14428 states and 16316 transitions. [2023-11-12 02:20:53,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2023-11-12 02:20:53,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:53,506 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:53,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-12 02:20:53,506 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:53,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:53,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1309922959, now seen corresponding path program 1 times [2023-11-12 02:20:53,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:53,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621511638] [2023-11-12 02:20:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:53,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 281 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-11-12 02:20:53,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:53,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621511638] [2023-11-12 02:20:53,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621511638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:53,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:53,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:20:53,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759259612] [2023-11-12 02:20:53,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:53,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:20:53,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:53,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:20:53,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:53,932 INFO L87 Difference]: Start difference. First operand 14428 states and 16316 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:55,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:55,013 INFO L93 Difference]: Finished difference Result 32350 states and 36463 transitions. [2023-11-12 02:20:55,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:20:55,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 357 [2023-11-12 02:20:55,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:55,031 INFO L225 Difference]: With dead ends: 32350 [2023-11-12 02:20:55,032 INFO L226 Difference]: Without dead ends: 16448 [2023-11-12 02:20:55,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:20:55,042 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 150 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:55,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 309 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:20:55,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16448 states. [2023-11-12 02:20:55,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16448 to 14052. [2023-11-12 02:20:55,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14052 states, 14051 states have (on average 1.095224539178706) internal successors, (15389), 14051 states have internal predecessors, (15389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:55,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14052 states to 14052 states and 15389 transitions. [2023-11-12 02:20:55,246 INFO L78 Accepts]: Start accepts. Automaton has 14052 states and 15389 transitions. Word has length 357 [2023-11-12 02:20:55,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:55,246 INFO L495 AbstractCegarLoop]: Abstraction has 14052 states and 15389 transitions. [2023-11-12 02:20:55,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:55,248 INFO L276 IsEmpty]: Start isEmpty. Operand 14052 states and 15389 transitions. [2023-11-12 02:20:55,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2023-11-12 02:20:55,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:55,257 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:55,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-12 02:20:55,257 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:55,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:55,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2132777761, now seen corresponding path program 1 times [2023-11-12 02:20:55,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:55,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068777213] [2023-11-12 02:20:55,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:55,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-11-12 02:20:56,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:56,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068777213] [2023-11-12 02:20:56,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068777213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:56,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:56,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:20:56,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6463175] [2023-11-12 02:20:56,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:56,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:20:56,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:56,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:20:56,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:20:56,273 INFO L87 Difference]: Start difference. First operand 14052 states and 15389 transitions. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:57,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:20:57,827 INFO L93 Difference]: Finished difference Result 28841 states and 31559 transitions. [2023-11-12 02:20:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:20:57,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 358 [2023-11-12 02:20:57,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:20:57,846 INFO L225 Difference]: With dead ends: 28841 [2023-11-12 02:20:57,846 INFO L226 Difference]: Without dead ends: 15159 [2023-11-12 02:20:57,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:20:57,854 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 307 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:20:57,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 111 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-12 02:20:57,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15159 states. [2023-11-12 02:20:58,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15159 to 14236. [2023-11-12 02:20:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14236 states, 14235 states have (on average 1.0942746750965928) internal successors, (15577), 14235 states have internal predecessors, (15577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:58,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14236 states to 14236 states and 15577 transitions. [2023-11-12 02:20:58,133 INFO L78 Accepts]: Start accepts. Automaton has 14236 states and 15577 transitions. Word has length 358 [2023-11-12 02:20:58,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:20:58,133 INFO L495 AbstractCegarLoop]: Abstraction has 14236 states and 15577 transitions. [2023-11-12 02:20:58,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:20:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 14236 states and 15577 transitions. [2023-11-12 02:20:58,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2023-11-12 02:20:58,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:20:58,143 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:20:58,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-12 02:20:58,144 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:20:58,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:20:58,144 INFO L85 PathProgramCache]: Analyzing trace with hash 827224776, now seen corresponding path program 1 times [2023-11-12 02:20:58,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:20:58,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136694524] [2023-11-12 02:20:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:20:58,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:20:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:20:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-12 02:20:58,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:20:58,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136694524] [2023-11-12 02:20:58,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136694524] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:20:58,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:20:58,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:20:58,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196797074] [2023-11-12 02:20:58,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:20:58,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:20:58,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:20:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:20:58,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:20:58,722 INFO L87 Difference]: Start difference. First operand 14236 states and 15577 transitions. Second operand has 4 states, 4 states have (on average 73.0) internal successors, (292), 3 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) [2023-11-12 02:21:00,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:00,233 INFO L93 Difference]: Finished difference Result 36219 states and 39627 transitions. [2023-11-12 02:21:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:21:00,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 73.0) internal successors, (292), 3 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 372 [2023-11-12 02:21:00,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:00,253 INFO L225 Difference]: With dead ends: 36219 [2023-11-12 02:21:00,253 INFO L226 Difference]: Without dead ends: 21801 [2023-11-12 02:21:00,260 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 [2023-11-12 02:21:00,261 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 229 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:00,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 71 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-12 02:21:00,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21801 states. [2023-11-12 02:21:00,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21801 to 20506. [2023-11-12 02:21:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20506 states, 20505 states have (on average 1.090904657400634) internal successors, (22369), 20505 states have internal predecessors, (22369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:21:00,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20506 states to 20506 states and 22369 transitions. [2023-11-12 02:21:00,551 INFO L78 Accepts]: Start accepts. Automaton has 20506 states and 22369 transitions. Word has length 372 [2023-11-12 02:21:00,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:00,551 INFO L495 AbstractCegarLoop]: Abstraction has 20506 states and 22369 transitions. [2023-11-12 02:21:00,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.0) internal successors, (292), 3 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) [2023-11-12 02:21:00,552 INFO L276 IsEmpty]: Start isEmpty. Operand 20506 states and 22369 transitions. [2023-11-12 02:21:00,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2023-11-12 02:21:00,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:00,559 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:00,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-12 02:21:00,559 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:00,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:00,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1553293930, now seen corresponding path program 1 times [2023-11-12 02:21:00,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:00,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851027761] [2023-11-12 02:21:00,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:00,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 146 proven. 200 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-12 02:21:01,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:01,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851027761] [2023-11-12 02:21:01,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851027761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:01,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236235978] [2023-11-12 02:21:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:01,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:01,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:01,081 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:01,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_180caf4f-9bf3-4ac1-adb8-d157371dab55/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:21:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:01,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:21:01,323 INFO L285 TraceCheckSpWp]: Computing forward predicates...