./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --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 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 02:19:57,732 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 02:19:57,813 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 02:19:57,819 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 02:19:57,820 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 02:19:57,842 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 02:19:57,843 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 02:19:57,843 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 02:19:57,844 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 02:19:57,845 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 02:19:57,845 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 02:19:57,845 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 02:19:57,846 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 02:19:57,846 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 02:19:57,848 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 02:19:57,848 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 02:19:57,848 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 02:19:57,848 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 02:19:57,849 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 02:19:57,849 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 02:19:57,851 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 02:19:57,851 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 02:19:57,852 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 02:19:57,852 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 02:19:57,852 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 02:19:57,852 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 02:19:57,852 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 02:19:57,853 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 02:19:57,853 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 02:19:57,853 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 02:19:57,853 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 02:19:57,853 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 02:19:57,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:19:57,854 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 02:19:57,854 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 02:19:57,854 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 02:19:57,854 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 02:19:57,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 02:19:57,855 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 02:19:57,855 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 02:19:57,856 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 02:19:57,856 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 02:19:57,856 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:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 [2024-10-11 02:19:58,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 02:19:58,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 02:19:58,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 02:19:58,098 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 02:19:58,099 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 02:19:58,100 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2024-10-11 02:19:59,635 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 02:19:59,887 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 02:19:59,888 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2024-10-11 02:19:59,895 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/6121effdd/da15ba9ffd6143ca90910bfc343020f4/FLAG3d1b5d8fa [2024-10-11 02:19:59,920 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/6121effdd/da15ba9ffd6143ca90910bfc343020f4 [2024-10-11 02:19:59,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 02:19:59,924 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 02:19:59,929 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 02:19:59,929 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 02:19:59,934 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 02:19:59,942 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:19:59" (1/1) ... [2024-10-11 02:19:59,942 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@292c20e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:19:59, skipping insertion in model container [2024-10-11 02:19:59,943 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:19:59" (1/1) ... [2024-10-11 02:19:59,978 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 02:20:00,307 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c[526,539] [2024-10-11 02:20:00,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:20:00,366 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 02:20:00,395 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c[526,539] [2024-10-11 02:20:00,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 02:20:00,442 INFO L204 MainTranslator]: Completed translation [2024-10-11 02:20:00,442 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:00 WrapperNode [2024-10-11 02:20:00,443 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 02:20:00,448 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 02:20:00,448 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 02:20:00,448 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 02:20:00,461 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:00" (1/1) ... [2024-10-11 02:20:00,467 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:00" (1/1) ... [2024-10-11 02:20:00,484 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2024-10-11 02:20:00,485 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 02:20:00,486 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 02:20:00,489 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 02:20:00,489 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 02:20:00,499 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:00" (1/1) ... [2024-10-11 02:20:00,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:00" (1/1) ... [2024-10-11 02:20:00,501 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:00" (1/1) ... [2024-10-11 02:20:00,512 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-10-11 02:20:00,512 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:00" (1/1) ... [2024-10-11 02:20:00,512 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:00" (1/1) ... [2024-10-11 02:20:00,515 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:00" (1/1) ... [2024-10-11 02:20:00,518 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:00" (1/1) ... [2024-10-11 02:20:00,519 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:00" (1/1) ... [2024-10-11 02:20:00,519 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:00" (1/1) ... [2024-10-11 02:20:00,521 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 02:20:00,522 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 02:20:00,522 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 02:20:00,522 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 02:20:00,523 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:00" (1/1) ... [2024-10-11 02:20:00,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 02:20:00,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:20:00,558 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 02:20:00,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 02:20:00,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 02:20:00,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 02:20:00,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 02:20:00,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 02:20:00,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 02:20:00,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-11 02:20:00,607 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-11 02:20:00,669 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 02:20:00,671 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 02:20:00,852 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-10-11 02:20:00,853 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 02:20:00,883 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 02:20:00,884 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 02:20:00,884 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:20:00 BoogieIcfgContainer [2024-10-11 02:20:00,884 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 02:20:00,886 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 02:20:00,886 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 02:20:00,888 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 02:20:00,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:19:59" (1/3) ... [2024-10-11 02:20:00,890 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702a8197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:20:00, skipping insertion in model container [2024-10-11 02:20:00,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:00" (2/3) ... [2024-10-11 02:20:00,890 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702a8197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:20:00, skipping insertion in model container [2024-10-11 02:20:00,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:20:00" (3/3) ... [2024-10-11 02:20:00,891 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound10.c [2024-10-11 02:20:00,907 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 02:20:00,908 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 02:20:00,965 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 02:20:00,972 INFO L333 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, 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;@c64231, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 02:20:00,973 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 02:20:00,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-11 02:20:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-11 02:20:00,983 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:20:00,984 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:20:00,985 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:20:00,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:20:00,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1291730102, now seen corresponding path program 1 times [2024-10-11 02:20:00,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:20:00,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871707571] [2024-10-11 02:20:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:00,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:20:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:20:01,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:20:01,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871707571] [2024-10-11 02:20:01,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871707571] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:20:01,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:20:01,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 02:20:01,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951376407] [2024-10-11 02:20:01,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:20:01,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 02:20:01,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:20:01,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 02:20:01,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 02:20:01,182 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:20:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:20:01,217 INFO L93 Difference]: Finished difference Result 45 states and 78 transitions. [2024-10-11 02:20:01,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 02:20:01,220 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-11 02:20:01,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:20:01,227 INFO L225 Difference]: With dead ends: 45 [2024-10-11 02:20:01,227 INFO L226 Difference]: Without dead ends: 21 [2024-10-11 02:20:01,230 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 02:20:01,233 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:20:01,234 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:20:01,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-11 02:20:01,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-11 02:20:01,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-11 02:20:01,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions. [2024-10-11 02:20:01,269 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 7 [2024-10-11 02:20:01,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:20:01,270 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 31 transitions. [2024-10-11 02:20:01,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:20:01,270 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions. [2024-10-11 02:20:01,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-11 02:20:01,271 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:20:01,271 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:20:01,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 02:20:01,272 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:20:01,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:20:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash 829671692, now seen corresponding path program 1 times [2024-10-11 02:20:01,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:20:01,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484515789] [2024-10-11 02:20:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:01,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:20:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:20:01,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:20:01,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484515789] [2024-10-11 02:20:01,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484515789] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:20:01,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:20:01,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 02:20:01,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920872917] [2024-10-11 02:20:01,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:20:01,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:20:01,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:20:01,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:20:01,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:20:01,431 INFO L87 Difference]: Start difference. First operand 21 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:20:01,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:20:01,495 INFO L93 Difference]: Finished difference Result 35 states and 50 transitions. [2024-10-11 02:20:01,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:20:01,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-11 02:20:01,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:20:01,497 INFO L225 Difference]: With dead ends: 35 [2024-10-11 02:20:01,497 INFO L226 Difference]: Without dead ends: 33 [2024-10-11 02:20:01,497 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:20:01,499 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:20:01,499 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 90 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:20:01,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-11 02:20:01,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2024-10-11 02:20:01,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-11 02:20:01,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2024-10-11 02:20:01,515 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 7 [2024-10-11 02:20:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:20:01,516 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2024-10-11 02:20:01,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:20:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2024-10-11 02:20:01,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-11 02:20:01,517 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:20:01,517 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:20:01,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 02:20:01,517 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:20:01,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:20:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash -166824855, now seen corresponding path program 1 times [2024-10-11 02:20:01,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:20:01,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64913937] [2024-10-11 02:20:01,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:01,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:20:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:20:01,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:20:01,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64913937] [2024-10-11 02:20:01,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64913937] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:20:01,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:20:01,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 02:20:01,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438396636] [2024-10-11 02:20:01,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:20:01,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 02:20:01,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:20:01,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 02:20:01,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 02:20:01,618 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:20:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:20:01,647 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2024-10-11 02:20:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 02:20:01,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-11 02:20:01,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:20:01,648 INFO L225 Difference]: With dead ends: 41 [2024-10-11 02:20:01,649 INFO L226 Difference]: Without dead ends: 27 [2024-10-11 02:20:01,649 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 02:20:01,654 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:20:01,655 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:20:01,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-11 02:20:01,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-10-11 02:20:01,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-11 02:20:01,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2024-10-11 02:20:01,661 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 9 [2024-10-11 02:20:01,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:20:01,661 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2024-10-11 02:20:01,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 02:20:01,661 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2024-10-11 02:20:01,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-11 02:20:01,662 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:20:01,662 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:20:01,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 02:20:01,663 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:20:01,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:20:01,663 INFO L85 PathProgramCache]: Analyzing trace with hash -439138420, now seen corresponding path program 1 times [2024-10-11 02:20:01,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:20:01,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813183141] [2024-10-11 02:20:01,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:01,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:20:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:01,756 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-11 02:20:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 02:20:01,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:20:01,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813183141] [2024-10-11 02:20:01,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813183141] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:20:01,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:20:01,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:20:01,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109708966] [2024-10-11 02:20:01,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:20:01,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:20:01,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:20:01,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:20:01,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:20:01,772 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 02:20:01,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:20:01,856 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2024-10-11 02:20:01,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:20:01,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-10-11 02:20:01,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:20:01,858 INFO L225 Difference]: With dead ends: 41 [2024-10-11 02:20:01,858 INFO L226 Difference]: Without dead ends: 39 [2024-10-11 02:20:01,859 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:20:01,859 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:20:01,863 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 87 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:20:01,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-11 02:20:01,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2024-10-11 02:20:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-11 02:20:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2024-10-11 02:20:01,874 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 12 [2024-10-11 02:20:01,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:20:01,874 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2024-10-11 02:20:01,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-11 02:20:01,874 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2024-10-11 02:20:01,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-11 02:20:01,875 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:20:01,875 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:20:01,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 02:20:01,875 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:20:01,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:20:01,878 INFO L85 PathProgramCache]: Analyzing trace with hash -235147060, now seen corresponding path program 1 times [2024-10-11 02:20:01,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:20:01,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216153525] [2024-10-11 02:20:01,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:01,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:20:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:20:01,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589409084] [2024-10-11 02:20:01,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:01,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:20:01,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:20:01,937 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:20:01,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 02:20:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:02,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 02:20:02,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:20:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 02:20:02,120 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 02:20:02,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:20:02,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216153525] [2024-10-11 02:20:02,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:20:02,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589409084] [2024-10-11 02:20:02,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589409084] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:20:02,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:20:02,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:20:02,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767632512] [2024-10-11 02:20:02,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:20:02,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:20:02,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:20:02,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:20:02,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:20:02,125 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 02:20:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:20:02,185 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2024-10-11 02:20:02,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:20:02,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-10-11 02:20:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:20:02,187 INFO L225 Difference]: With dead ends: 60 [2024-10-11 02:20:02,187 INFO L226 Difference]: Without dead ends: 45 [2024-10-11 02:20:02,187 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:20:02,188 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:20:02,188 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 91 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:20:02,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-11 02:20:02,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-10-11 02:20:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 29 states have internal predecessors, (35), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-11 02:20:02,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2024-10-11 02:20:02,197 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 17 [2024-10-11 02:20:02,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:20:02,198 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2024-10-11 02:20:02,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 02:20:02,198 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2024-10-11 02:20:02,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-11 02:20:02,199 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:20:02,199 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:20:02,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 02:20:02,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:20:02,404 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:20:02,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:20:02,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2012527405, now seen corresponding path program 1 times [2024-10-11 02:20:02,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:20:02,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220062198] [2024-10-11 02:20:02,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:02,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:20:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:20:02,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432453176] [2024-10-11 02:20:02,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:02,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:20:02,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:20:02,424 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:20:02,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 02:20:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:02,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 02:20:02,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:20:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 02:20:02,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:20:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 02:20:02,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:20:02,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220062198] [2024-10-11 02:20:02,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:20:02,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432453176] [2024-10-11 02:20:02,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432453176] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:20:02,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:20:02,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-10-11 02:20:02,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608696679] [2024-10-11 02:20:02,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:20:02,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 02:20:02,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:20:02,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 02:20:02,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-11 02:20:02,760 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-11 02:20:02,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:20:02,893 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2024-10-11 02:20:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 02:20:02,894 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2024-10-11 02:20:02,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:20:02,897 INFO L225 Difference]: With dead ends: 63 [2024-10-11 02:20:02,897 INFO L226 Difference]: Without dead ends: 60 [2024-10-11 02:20:02,897 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-10-11 02:20:02,898 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:20:02,898 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 92 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:20:02,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-11 02:20:02,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2024-10-11 02:20:02,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 36 states have internal predecessors, (44), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-10-11 02:20:02,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2024-10-11 02:20:02,909 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 25 [2024-10-11 02:20:02,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:20:02,909 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2024-10-11 02:20:02,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-11 02:20:02,910 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2024-10-11 02:20:02,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-11 02:20:02,911 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:20:02,911 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:20:02,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 02:20:03,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:20:03,112 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:20:03,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:20:03,113 INFO L85 PathProgramCache]: Analyzing trace with hash 292094342, now seen corresponding path program 1 times [2024-10-11 02:20:03,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:20:03,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359680885] [2024-10-11 02:20:03,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:03,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:20:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:03,236 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-11 02:20:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:03,240 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 02:20:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:03,246 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-11 02:20:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:03,253 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-11 02:20:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-11 02:20:03,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:20:03,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359680885] [2024-10-11 02:20:03,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359680885] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:20:03,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639346191] [2024-10-11 02:20:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:03,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:20:03,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:20:03,260 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:20:03,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 02:20:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:03,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 02:20:03,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:20:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-11 02:20:03,390 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:20:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-11 02:20:03,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639346191] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:20:03,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:20:03,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-10-11 02:20:03,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963087128] [2024-10-11 02:20:03,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:20:03,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 02:20:03,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:20:03,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 02:20:03,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-11 02:20:03,448 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-11 02:20:03,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:20:03,544 INFO L93 Difference]: Finished difference Result 154 states and 189 transitions. [2024-10-11 02:20:03,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 02:20:03,544 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 32 [2024-10-11 02:20:03,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:20:03,546 INFO L225 Difference]: With dead ends: 154 [2024-10-11 02:20:03,546 INFO L226 Difference]: Without dead ends: 129 [2024-10-11 02:20:03,546 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-10-11 02:20:03,547 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 46 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:20:03,547 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 122 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:20:03,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-10-11 02:20:03,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 122. [2024-10-11 02:20:03,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.205128205128205) internal successors, (94), 82 states have internal predecessors, (94), 27 states have call successors, (27), 16 states have call predecessors, (27), 16 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-10-11 02:20:03,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2024-10-11 02:20:03,563 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 32 [2024-10-11 02:20:03,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:20:03,563 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2024-10-11 02:20:03,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-11 02:20:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2024-10-11 02:20:03,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-11 02:20:03,565 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:20:03,565 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-11 02:20:03,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 02:20:03,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:20:03,770 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:20:03,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:20:03,771 INFO L85 PathProgramCache]: Analyzing trace with hash 747162997, now seen corresponding path program 1 times [2024-10-11 02:20:03,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:20:03,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951966586] [2024-10-11 02:20:03,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:03,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:20:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:20:03,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525009885] [2024-10-11 02:20:03,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:03,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:20:03,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:20:03,785 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:20:03,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 02:20:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:03,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 02:20:03,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:20:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-11 02:20:03,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:20:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-11 02:20:03,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:20:03,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951966586] [2024-10-11 02:20:03,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:20:03,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525009885] [2024-10-11 02:20:03,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525009885] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 02:20:03,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:20:03,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-11 02:20:03,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902716435] [2024-10-11 02:20:03,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:20:03,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:20:03,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:20:03,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:20:03,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 02:20:03,975 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-11 02:20:05,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-11 02:20:05,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:20:05,152 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2024-10-11 02:20:05,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:20:05,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-10-11 02:20:05,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:20:05,153 INFO L225 Difference]: With dead ends: 145 [2024-10-11 02:20:05,153 INFO L226 Difference]: Without dead ends: 139 [2024-10-11 02:20:05,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-11 02:20:05,154 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-11 02:20:05,154 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 85 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-11 02:20:05,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-10-11 02:20:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2024-10-11 02:20:05,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 89 states have internal predecessors, (100), 28 states have call successors, (28), 18 states have call predecessors, (28), 17 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2024-10-11 02:20:05,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 154 transitions. [2024-10-11 02:20:05,169 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 154 transitions. Word has length 35 [2024-10-11 02:20:05,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:20:05,170 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 154 transitions. [2024-10-11 02:20:05,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-11 02:20:05,170 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 154 transitions. [2024-10-11 02:20:05,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-11 02:20:05,171 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:20:05,171 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:20:05,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 02:20:05,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 02:20:05,375 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:20:05,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:20:05,375 INFO L85 PathProgramCache]: Analyzing trace with hash -244406458, now seen corresponding path program 1 times [2024-10-11 02:20:05,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:20:05,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572789829] [2024-10-11 02:20:05,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:05,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:20:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:05,432 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-11 02:20:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:05,436 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 02:20:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:05,438 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-11 02:20:05,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:05,440 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 02:20:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:05,443 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-11 02:20:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:05,445 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-11 02:20:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:05,448 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-11 02:20:05,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:20:05,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572789829] [2024-10-11 02:20:05,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572789829] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 02:20:05,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 02:20:05,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 02:20:05,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380216808] [2024-10-11 02:20:05,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 02:20:05,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 02:20:05,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:20:05,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 02:20:05,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 02:20:05,449 INFO L87 Difference]: Start difference. First operand 131 states and 154 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-11 02:20:05,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:20:05,488 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2024-10-11 02:20:05,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 02:20:05,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2024-10-11 02:20:05,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:20:05,489 INFO L225 Difference]: With dead ends: 136 [2024-10-11 02:20:05,489 INFO L226 Difference]: Without dead ends: 117 [2024-10-11 02:20:05,489 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 02:20:05,490 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:20:05,490 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 104 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 02:20:05,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-10-11 02:20:05,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-10-11 02:20:05,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 79 states have internal predecessors, (90), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-10-11 02:20:05,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2024-10-11 02:20:05,502 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 41 [2024-10-11 02:20:05,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:20:05,502 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2024-10-11 02:20:05,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-11 02:20:05,503 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2024-10-11 02:20:05,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-11 02:20:05,503 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:20:05,503 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:20:05,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 02:20:05,504 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:20:05,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:20:05,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1125945480, now seen corresponding path program 1 times [2024-10-11 02:20:05,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:20:05,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747255682] [2024-10-11 02:20:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:05,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:20:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:05,603 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-11 02:20:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:05,606 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 02:20:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:05,608 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-11 02:20:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:05,611 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 02:20:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:05,613 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-11 02:20:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:05,616 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 02:20:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:05,618 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-11 02:20:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-11 02:20:05,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:20:05,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747255682] [2024-10-11 02:20:05,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747255682] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:20:05,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217371341] [2024-10-11 02:20:05,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:05,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:20:05,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:20:05,622 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:20:05,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 02:20:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:05,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 02:20:05,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:20:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-11 02:20:05,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:20:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-10-11 02:20:05,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217371341] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:20:05,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:20:05,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-10-11 02:20:05,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368243090] [2024-10-11 02:20:05,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:20:05,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 02:20:05,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:20:05,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 02:20:05,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-10-11 02:20:05,777 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-10-11 02:20:05,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:20:05,899 INFO L93 Difference]: Finished difference Result 240 states and 293 transitions. [2024-10-11 02:20:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 02:20:05,900 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 48 [2024-10-11 02:20:05,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:20:05,901 INFO L225 Difference]: With dead ends: 240 [2024-10-11 02:20:05,901 INFO L226 Difference]: Without dead ends: 219 [2024-10-11 02:20:05,902 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-10-11 02:20:05,902 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 76 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:20:05,902 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 145 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:20:05,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-10-11 02:20:05,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 212. [2024-10-11 02:20:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 137 states have (on average 1.197080291970803) internal successors, (164), 146 states have internal predecessors, (164), 49 states have call successors, (49), 26 states have call predecessors, (49), 25 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2024-10-11 02:20:05,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 258 transitions. [2024-10-11 02:20:05,922 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 258 transitions. Word has length 48 [2024-10-11 02:20:05,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:20:05,922 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 258 transitions. [2024-10-11 02:20:05,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 5 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2024-10-11 02:20:05,922 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 258 transitions. [2024-10-11 02:20:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-11 02:20:05,923 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:20:05,924 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:20:05,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 02:20:06,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 02:20:06,125 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:20:06,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:20:06,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1450073182, now seen corresponding path program 1 times [2024-10-11 02:20:06,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:20:06,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949807063] [2024-10-11 02:20:06,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:06,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:20:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:20:06,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289380213] [2024-10-11 02:20:06,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:06,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:20:06,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:20:06,147 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:20:06,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 02:20:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:06,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-11 02:20:06,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:20:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-11 02:20:06,472 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:20:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-10-11 02:20:07,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:20:07,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949807063] [2024-10-11 02:20:07,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:20:07,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289380213] [2024-10-11 02:20:07,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289380213] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:20:07,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:20:07,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-10-11 02:20:07,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84353618] [2024-10-11 02:20:07,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:20:07,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 02:20:07,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:20:07,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 02:20:07,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-10-11 02:20:07,840 INFO L87 Difference]: Start difference. First operand 212 states and 258 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2024-10-11 02:20:08,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:20:08,539 INFO L93 Difference]: Finished difference Result 358 states and 459 transitions. [2024-10-11 02:20:08,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 02:20:08,540 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 57 [2024-10-11 02:20:08,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:20:08,542 INFO L225 Difference]: With dead ends: 358 [2024-10-11 02:20:08,542 INFO L226 Difference]: Without dead ends: 297 [2024-10-11 02:20:08,543 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-10-11 02:20:08,544 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 02:20:08,544 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 343 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 02:20:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-10-11 02:20:08,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 271. [2024-10-11 02:20:08,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 184 states have (on average 1.2282608695652173) internal successors, (226), 191 states have internal predecessors, (226), 57 states have call successors, (57), 29 states have call predecessors, (57), 29 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2024-10-11 02:20:08,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 338 transitions. [2024-10-11 02:20:08,602 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 338 transitions. Word has length 57 [2024-10-11 02:20:08,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:20:08,603 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 338 transitions. [2024-10-11 02:20:08,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2024-10-11 02:20:08,603 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 338 transitions. [2024-10-11 02:20:08,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-11 02:20:08,609 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:20:08,610 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:20:08,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 02:20:08,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 02:20:08,811 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:20:08,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:20:08,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1715906499, now seen corresponding path program 1 times [2024-10-11 02:20:08,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:20:08,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017311948] [2024-10-11 02:20:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:08,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:20:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:20:08,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010826966] [2024-10-11 02:20:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:08,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:20:08,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:20:08,843 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:20:08,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 02:20:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:08,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-11 02:20:08,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:20:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-11 02:20:09,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:20:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-11 02:20:09,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:20:09,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017311948] [2024-10-11 02:20:09,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:20:09,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010826966] [2024-10-11 02:20:09,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010826966] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:20:09,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:20:09,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-10-11 02:20:09,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546394525] [2024-10-11 02:20:09,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:20:09,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 02:20:09,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:20:09,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 02:20:09,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-10-11 02:20:09,677 INFO L87 Difference]: Start difference. First operand 271 states and 338 transitions. Second operand has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-11 02:20:10,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:20:10,279 INFO L93 Difference]: Finished difference Result 338 states and 423 transitions. [2024-10-11 02:20:10,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 02:20:10,280 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) Word has length 68 [2024-10-11 02:20:10,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:20:10,282 INFO L225 Difference]: With dead ends: 338 [2024-10-11 02:20:10,282 INFO L226 Difference]: Without dead ends: 270 [2024-10-11 02:20:10,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-10-11 02:20:10,284 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 26 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 02:20:10,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 244 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 02:20:10,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2024-10-11 02:20:10,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 242. [2024-10-11 02:20:10,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 165 states have (on average 1.1818181818181819) internal successors, (195), 170 states have internal predecessors, (195), 47 states have call successors, (47), 30 states have call predecessors, (47), 29 states have return successors, (45), 41 states have call predecessors, (45), 45 states have call successors, (45) [2024-10-11 02:20:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 287 transitions. [2024-10-11 02:20:10,335 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 287 transitions. Word has length 68 [2024-10-11 02:20:10,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:20:10,336 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 287 transitions. [2024-10-11 02:20:10,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2024-10-11 02:20:10,336 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 287 transitions. [2024-10-11 02:20:10,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-11 02:20:10,337 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:20:10,337 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 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] [2024-10-11 02:20:10,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-11 02:20:10,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:20:10,542 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:20:10,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:20:10,542 INFO L85 PathProgramCache]: Analyzing trace with hash 970851771, now seen corresponding path program 1 times [2024-10-11 02:20:10,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:20:10,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306887755] [2024-10-11 02:20:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:10,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:20:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:10,814 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-11 02:20:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:10,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 02:20:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:10,833 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-11 02:20:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:10,838 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 02:20:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:10,844 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-11 02:20:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:10,855 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 02:20:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:10,867 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-11 02:20:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:10,878 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-10-11 02:20:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:10,888 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-11 02:20:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:10,891 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-10-11 02:20:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:10,894 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-10-11 02:20:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-11 02:20:10,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:20:10,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306887755] [2024-10-11 02:20:10,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306887755] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:20:10,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844507769] [2024-10-11 02:20:10,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:10,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:20:10,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:20:10,899 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:20:10,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 02:20:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:10,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 02:20:10,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:20:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-11 02:20:11,136 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:20:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-10-11 02:20:11,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844507769] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:20:11,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:20:11,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-10-11 02:20:11,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733231484] [2024-10-11 02:20:11,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:20:11,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 02:20:11,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:20:11,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 02:20:11,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-10-11 02:20:11,575 INFO L87 Difference]: Start difference. First operand 242 states and 287 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 12 states have internal predecessors, (50), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-10-11 02:20:11,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:20:11,833 INFO L93 Difference]: Finished difference Result 280 states and 328 transitions. [2024-10-11 02:20:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 02:20:11,833 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 12 states have internal predecessors, (50), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 73 [2024-10-11 02:20:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:20:11,835 INFO L225 Difference]: With dead ends: 280 [2024-10-11 02:20:11,835 INFO L226 Difference]: Without dead ends: 214 [2024-10-11 02:20:11,836 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-10-11 02:20:11,836 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 15 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:20:11,836 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 256 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:20:11,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-10-11 02:20:11,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 209. [2024-10-11 02:20:11,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 146 states have internal predecessors, (165), 40 states have call successors, (40), 25 states have call predecessors, (40), 25 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2024-10-11 02:20:11,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 244 transitions. [2024-10-11 02:20:11,885 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 244 transitions. Word has length 73 [2024-10-11 02:20:11,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:20:11,885 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 244 transitions. [2024-10-11 02:20:11,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 12 states have internal predecessors, (50), 8 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2024-10-11 02:20:11,886 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 244 transitions. [2024-10-11 02:20:11,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-10-11 02:20:11,887 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:20:11,887 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-10-11 02:20:11,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 02:20:12,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-11 02:20:12,091 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:20:12,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:20:12,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1153550505, now seen corresponding path program 2 times [2024-10-11 02:20:12,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:20:12,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043575444] [2024-10-11 02:20:12,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:12,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:20:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:20:12,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164200941] [2024-10-11 02:20:12,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:20:12,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:20:12,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:20:12,137 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:20:12,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 02:20:12,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:20:12,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:20:12,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-11 02:20:12,203 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:20:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-10-11 02:20:12,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:20:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-10-11 02:20:35,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:20:35,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043575444] [2024-10-11 02:20:35,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:20:35,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164200941] [2024-10-11 02:20:35,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164200941] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:20:35,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:20:35,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2024-10-11 02:20:35,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734025475] [2024-10-11 02:20:35,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:20:35,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 02:20:35,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:20:35,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 02:20:35,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2024-10-11 02:20:35,229 INFO L87 Difference]: Start difference. First operand 209 states and 244 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 23 states have internal predecessors, (53), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2024-10-11 02:20:54,081 WARN L286 SmtUtils]: Spent 14.00s on a formula simplification. DAG size of input: 218 DAG size of output: 125 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-11 02:20:55,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:20:55,233 INFO L93 Difference]: Finished difference Result 318 states and 403 transitions. [2024-10-11 02:20:55,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-11 02:20:55,234 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 23 states have internal predecessors, (53), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) Word has length 89 [2024-10-11 02:20:55,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:20:55,236 INFO L225 Difference]: With dead ends: 318 [2024-10-11 02:20:55,236 INFO L226 Difference]: Without dead ends: 282 [2024-10-11 02:20:55,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2024-10-11 02:20:55,238 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 59 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-10-11 02:20:55,238 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 701 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-10-11 02:20:55,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2024-10-11 02:20:55,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 244. [2024-10-11 02:20:55,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 166 states have (on average 1.1746987951807228) internal successors, (195), 170 states have internal predecessors, (195), 49 states have call successors, (49), 28 states have call predecessors, (49), 28 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2024-10-11 02:20:55,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 292 transitions. [2024-10-11 02:20:55,310 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 292 transitions. Word has length 89 [2024-10-11 02:20:55,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:20:55,311 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 292 transitions. [2024-10-11 02:20:55,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 23 states have internal predecessors, (53), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2024-10-11 02:20:55,311 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 292 transitions. [2024-10-11 02:20:55,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-10-11 02:20:55,312 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:20:55,312 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2024-10-11 02:20:55,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 02:20:55,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:20:55,517 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:20:55,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:20:55,517 INFO L85 PathProgramCache]: Analyzing trace with hash 531650401, now seen corresponding path program 3 times [2024-10-11 02:20:55,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:20:55,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432621692] [2024-10-11 02:20:55,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:55,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:20:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:20:55,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462624868] [2024-10-11 02:20:55,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 02:20:55,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:20:55,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:20:55,548 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:20:55,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 02:20:55,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-11 02:20:55,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:20:55,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-11 02:20:55,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:20:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 81 proven. 41 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2024-10-11 02:20:55,763 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:20:56,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:20:56,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432621692] [2024-10-11 02:20:56,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:20:56,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462624868] [2024-10-11 02:20:56,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462624868] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:20:56,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 02:20:56,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-10-11 02:20:56,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553276212] [2024-10-11 02:20:56,746 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 02:20:56,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 02:20:56,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:20:56,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 02:20:56,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-10-11 02:20:56,748 INFO L87 Difference]: Start difference. First operand 244 states and 292 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-11 02:20:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:20:56,946 INFO L93 Difference]: Finished difference Result 267 states and 313 transitions. [2024-10-11 02:20:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 02:20:56,947 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 94 [2024-10-11 02:20:56,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:20:56,949 INFO L225 Difference]: With dead ends: 267 [2024-10-11 02:20:56,949 INFO L226 Difference]: Without dead ends: 265 [2024-10-11 02:20:56,949 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-10-11 02:20:56,950 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 02:20:56,950 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 74 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 02:20:56,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-10-11 02:20:57,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 260. [2024-10-11 02:20:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 178 states have (on average 1.1629213483146068) internal successors, (207), 182 states have internal predecessors, (207), 49 states have call successors, (49), 32 states have call predecessors, (49), 32 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2024-10-11 02:20:57,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 304 transitions. [2024-10-11 02:20:57,010 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 304 transitions. Word has length 94 [2024-10-11 02:20:57,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:20:57,011 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 304 transitions. [2024-10-11 02:20:57,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-10-11 02:20:57,011 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 304 transitions. [2024-10-11 02:20:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-10-11 02:20:57,012 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:20:57,012 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:20:57,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 02:20:57,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-11 02:20:57,213 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:20:57,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:20:57,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1792633709, now seen corresponding path program 1 times [2024-10-11 02:20:57,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:20:57,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093911190] [2024-10-11 02:20:57,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:57,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:20:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:57,348 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-11 02:20:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:57,351 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 02:20:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:57,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-11 02:20:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:57,355 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 02:20:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:57,357 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-11 02:20:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:57,359 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 02:20:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:57,361 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-11 02:20:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:57,363 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-10-11 02:20:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:57,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-11 02:20:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:57,369 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-10-11 02:20:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:57,373 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-10-11 02:20:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:57,375 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-10-11 02:20:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:57,377 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-10-11 02:20:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:57,379 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-10-11 02:20:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-10-11 02:20:57,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:20:57,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093911190] [2024-10-11 02:20:57,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093911190] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:20:57,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165915559] [2024-10-11 02:20:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:57,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:20:57,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:20:57,387 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:20:57,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 02:20:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:20:57,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 02:20:57,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:20:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-10-11 02:20:57,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:20:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2024-10-11 02:20:57,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165915559] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:20:57,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:20:57,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2024-10-11 02:20:57,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905424814] [2024-10-11 02:20:57,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:20:57,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 02:20:57,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:20:57,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 02:20:57,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2024-10-11 02:20:57,669 INFO L87 Difference]: Start difference. First operand 260 states and 304 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2024-10-11 02:20:58,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:20:58,094 INFO L93 Difference]: Finished difference Result 719 states and 883 transitions. [2024-10-11 02:20:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 02:20:58,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 95 [2024-10-11 02:20:58,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:20:58,097 INFO L225 Difference]: With dead ends: 719 [2024-10-11 02:20:58,097 INFO L226 Difference]: Without dead ends: 649 [2024-10-11 02:20:58,098 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2024-10-11 02:20:58,098 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 142 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 02:20:58,099 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 199 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 02:20:58,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2024-10-11 02:20:58,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 561. [2024-10-11 02:20:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 375 states have (on average 1.208) internal successors, (453), 393 states have internal predecessors, (453), 116 states have call successors, (116), 69 states have call predecessors, (116), 69 states have return successors, (112), 98 states have call predecessors, (112), 112 states have call successors, (112) [2024-10-11 02:20:58,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 681 transitions. [2024-10-11 02:20:58,346 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 681 transitions. Word has length 95 [2024-10-11 02:20:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:20:58,352 INFO L471 AbstractCegarLoop]: Abstraction has 561 states and 681 transitions. [2024-10-11 02:20:58,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 9 states have call successors, (41), 6 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2024-10-11 02:20:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 681 transitions. [2024-10-11 02:20:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-10-11 02:20:58,354 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:20:58,354 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 02:20:58,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 02:20:58,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 02:20:58,558 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:20:58,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:20:58,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1998377320, now seen corresponding path program 2 times [2024-10-11 02:20:58,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:20:58,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201137762] [2024-10-11 02:20:58,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:20:58,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:20:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:20:58,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951646171] [2024-10-11 02:20:58,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:20:58,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:20:58,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:20:58,593 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:20:58,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 02:20:58,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:20:58,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:20:58,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-10-11 02:20:58,657 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:20:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-10-11 02:20:59,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:21:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-10-11 02:21:01,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:21:01,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201137762] [2024-10-11 02:21:01,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 02:21:01,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951646171] [2024-10-11 02:21:01,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951646171] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:21:01,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 02:21:01,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2024-10-11 02:21:01,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656655919] [2024-10-11 02:21:01,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 02:21:01,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-11 02:21:01,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:21:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-11 02:21:01,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2024-10-11 02:21:01,395 INFO L87 Difference]: Start difference. First operand 561 states and 681 transitions. Second operand has 27 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-10-11 02:21:06,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-10-11 02:21:06,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:21:06,531 INFO L93 Difference]: Finished difference Result 731 states and 906 transitions. [2024-10-11 02:21:06,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-11 02:21:06,531 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) Word has length 100 [2024-10-11 02:21:06,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:21:06,535 INFO L225 Difference]: With dead ends: 731 [2024-10-11 02:21:06,536 INFO L226 Difference]: Without dead ends: 554 [2024-10-11 02:21:06,537 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2024-10-11 02:21:06,537 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 74 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-10-11 02:21:06,537 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 455 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-10-11 02:21:06,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2024-10-11 02:21:06,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 489. [2024-10-11 02:21:06,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 327 states have (on average 1.18348623853211) internal successors, (387), 340 states have internal predecessors, (387), 98 states have call successors, (98), 64 states have call predecessors, (98), 63 states have return successors, (94), 84 states have call predecessors, (94), 94 states have call successors, (94) [2024-10-11 02:21:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 579 transitions. [2024-10-11 02:21:06,747 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 579 transitions. Word has length 100 [2024-10-11 02:21:06,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:21:06,747 INFO L471 AbstractCegarLoop]: Abstraction has 489 states and 579 transitions. [2024-10-11 02:21:06,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2024-10-11 02:21:06,747 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 579 transitions. [2024-10-11 02:21:06,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-10-11 02:21:06,748 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:21:06,748 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 02:21:06,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-11 02:21:06,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 02:21:06,950 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:21:06,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:21:06,950 INFO L85 PathProgramCache]: Analyzing trace with hash 102666096, now seen corresponding path program 2 times [2024-10-11 02:21:06,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:21:06,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759258461] [2024-10-11 02:21:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:21:06,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:21:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:21:07,254 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-11 02:21:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:21:07,258 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 02:21:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:21:07,260 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-11 02:21:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:21:07,265 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-11 02:21:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:21:07,267 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-11 02:21:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:21:07,270 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-11 02:21:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:21:07,273 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-10-11 02:21:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:21:07,277 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-10-11 02:21:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:21:07,280 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-11 02:21:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:21:07,282 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-10-11 02:21:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:21:07,285 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-10-11 02:21:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:21:07,289 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-10-11 02:21:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:21:07,294 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-10-11 02:21:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:21:07,300 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-10-11 02:21:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:21:07,303 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-10-11 02:21:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:21:07,306 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-10-11 02:21:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 02:21:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-10-11 02:21:07,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 02:21:07,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759258461] [2024-10-11 02:21:07,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759258461] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 02:21:07,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318230013] [2024-10-11 02:21:07,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 02:21:07,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:21:07,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:21:07,311 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:21:07,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 02:21:07,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 02:21:07,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:21:07,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-11 02:21:07,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 02:21:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-10-11 02:21:07,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 02:21:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-10-11 02:21:08,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318230013] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 02:21:08,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 02:21:08,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 10] total 24 [2024-10-11 02:21:08,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927391898] [2024-10-11 02:21:08,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 02:21:08,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 02:21:08,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 02:21:08,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 02:21:08,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2024-10-11 02:21:08,866 INFO L87 Difference]: Start difference. First operand 489 states and 579 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 15 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 15 states have call predecessors, (47), 15 states have call successors, (47) [2024-10-11 02:21:09,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 02:21:09,556 INFO L93 Difference]: Finished difference Result 561 states and 690 transitions. [2024-10-11 02:21:09,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 02:21:09,557 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 15 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 15 states have call predecessors, (47), 15 states have call successors, (47) Word has length 105 [2024-10-11 02:21:09,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 02:21:09,560 INFO L225 Difference]: With dead ends: 561 [2024-10-11 02:21:09,560 INFO L226 Difference]: Without dead ends: 492 [2024-10-11 02:21:09,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2024-10-11 02:21:09,561 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 30 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 02:21:09,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 252 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 02:21:09,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2024-10-11 02:21:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 439. [2024-10-11 02:21:09,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 289 states have (on average 1.179930795847751) internal successors, (341), 309 states have internal predecessors, (341), 93 states have call successors, (93), 56 states have call predecessors, (93), 56 states have return successors, (87), 73 states have call predecessors, (87), 87 states have call successors, (87) [2024-10-11 02:21:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 521 transitions. [2024-10-11 02:21:09,724 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 521 transitions. Word has length 105 [2024-10-11 02:21:09,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 02:21:09,724 INFO L471 AbstractCegarLoop]: Abstraction has 439 states and 521 transitions. [2024-10-11 02:21:09,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 15 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (47), 15 states have call predecessors, (47), 15 states have call successors, (47) [2024-10-11 02:21:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 521 transitions. [2024-10-11 02:21:09,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-10-11 02:21:09,725 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 02:21:09,725 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-10-11 02:21:09,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-11 02:21:09,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 02:21:09,930 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 02:21:09,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 02:21:09,931 INFO L85 PathProgramCache]: Analyzing trace with hash -349531392, now seen corresponding path program 4 times [2024-10-11 02:21:09,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 02:21:09,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541480192] [2024-10-11 02:21:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 02:21:09,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 02:21:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 02:21:09,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965880679] [2024-10-11 02:21:09,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 02:21:09,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 02:21:09,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 02:21:09,957 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 02:21:09,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 02:21:10,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 02:21:10,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 02:21:10,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-10-11 02:21:10,047 INFO L278 TraceCheckSpWp]: Computing forward predicates...