./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 1eba5bc7e50ef659abfe155713ae512eb1ae4032ecb78db63a02f9acbcdf9dbe --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-09 22:43:31,973 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 22:43:32,051 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 22:43:32,057 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 22:43:32,057 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 22:43:32,095 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 22:43:32,095 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 22:43:32,096 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 22:43:32,096 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 22:43:32,097 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 22:43:32,097 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 22:43:32,097 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 22:43:32,098 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 22:43:32,098 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 22:43:32,099 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 22:43:32,099 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 22:43:32,099 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 22:43:32,099 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 22:43:32,100 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 22:43:32,100 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 22:43:32,100 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 22:43:32,101 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 22:43:32,101 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 22:43:32,102 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 22:43:32,102 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 22:43:32,102 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 22:43:32,103 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 22:43:32,103 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 22:43:32,103 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-09 22:43:32,104 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 22:43:32,104 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 22:43:32,104 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 22:43:32,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 22:43:32,105 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 22:43:32,105 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 22:43:32,105 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 22:43:32,106 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 22:43:32,106 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 22:43:32,106 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 22:43:32,106 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 22:43:32,107 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 22:43:32,107 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 22:43:32,107 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1eba5bc7e50ef659abfe155713ae512eb1ae4032ecb78db63a02f9acbcdf9dbe [2024-11-09 22:43:32,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 22:43:32,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 22:43:32,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 22:43:32,402 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 22:43:32,403 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 22:43:32,404 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c [2024-11-09 22:43:33,843 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 22:43:34,027 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 22:43:34,028 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound5.c [2024-11-09 22:43:34,034 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf4662d4b/c0b7edc6dbdb40aaaba845c982166033/FLAG47654cbee [2024-11-09 22:43:34,418 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf4662d4b/c0b7edc6dbdb40aaaba845c982166033 [2024-11-09 22:43:34,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 22:43:34,423 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 22:43:34,424 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 22:43:34,424 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 22:43:34,428 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 22:43:34,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:43:34" (1/1) ... [2024-11-09 22:43:34,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4918ae58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34, skipping insertion in model container [2024-11-09 22:43:34,430 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:43:34" (1/1) ... [2024-11-09 22:43:34,449 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 22:43:34,633 WARN L250 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/hard-ll_unwindbound5.c[538,551] [2024-11-09 22:43:34,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 22:43:34,667 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 22:43:34,679 WARN L250 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/hard-ll_unwindbound5.c[538,551] [2024-11-09 22:43:34,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 22:43:34,702 INFO L204 MainTranslator]: Completed translation [2024-11-09 22:43:34,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34 WrapperNode [2024-11-09 22:43:34,703 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 22:43:34,704 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 22:43:34,704 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 22:43:34,704 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 22:43:34,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2024-11-09 22:43:34,716 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2024-11-09 22:43:34,735 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2024-11-09 22:43:34,735 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 22:43:34,736 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 22:43:34,736 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 22:43:34,736 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 22:43:34,747 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2024-11-09 22:43:34,747 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2024-11-09 22:43:34,749 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2024-11-09 22:43:34,768 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-09 22:43:34,769 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2024-11-09 22:43:34,769 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2024-11-09 22:43:34,772 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2024-11-09 22:43:34,773 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2024-11-09 22:43:34,774 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2024-11-09 22:43:34,775 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2024-11-09 22:43:34,778 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 22:43:34,779 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-09 22:43:34,779 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-09 22:43:34,779 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-09 22:43:34,780 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (1/1) ... [2024-11-09 22:43:34,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 22:43:34,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:43:34,817 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 22:43:34,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 22:43:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 22:43:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 22:43:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 22:43:34,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 22:43:34,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 22:43:34,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 22:43:34,912 INFO L256 CfgBuilder]: Building ICFG [2024-11-09 22:43:34,914 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 22:43:35,072 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-09 22:43:35,072 INFO L307 CfgBuilder]: Performing block encoding [2024-11-09 22:43:35,083 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 22:43:35,084 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 22:43:35,084 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 10:43:35 BoogieIcfgContainer [2024-11-09 22:43:35,084 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-09 22:43:35,087 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 22:43:35,087 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 22:43:35,091 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 22:43:35,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:43:34" (1/3) ... [2024-11-09 22:43:35,092 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51243a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:43:35, skipping insertion in model container [2024-11-09 22:43:35,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:43:34" (2/3) ... [2024-11-09 22:43:35,092 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51243a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:43:35, skipping insertion in model container [2024-11-09 22:43:35,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.11 10:43:35" (3/3) ... [2024-11-09 22:43:35,094 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound5.c [2024-11-09 22:43:35,110 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 22:43:35,110 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 22:43:35,178 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 22:43:35,187 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;@c9a706d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 22:43:35,187 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 22:43:35,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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) [2024-11-09 22:43:35,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 22:43:35,200 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:43:35,200 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:43:35,201 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:43:35,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:43:35,204 INFO L85 PathProgramCache]: Analyzing trace with hash -292126860, now seen corresponding path program 1 times [2024-11-09 22:43:35,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:43:35,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748775689] [2024-11-09 22:43:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:35,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:43:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 22:43:35,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:43:35,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748775689] [2024-11-09 22:43:35,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748775689] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:43:35,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:43:35,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 22:43:35,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65582086] [2024-11-09 22:43:35,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:43:35,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 22:43:35,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:43:35,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 22:43:35,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 22:43:35,378 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2024-11-09 22:43:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:43:35,394 INFO L93 Difference]: Finished difference Result 55 states and 89 transitions. [2024-11-09 22:43:35,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 22:43:35,396 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 11 [2024-11-09 22:43:35,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:43:35,402 INFO L225 Difference]: With dead ends: 55 [2024-11-09 22:43:35,402 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 22:43:35,405 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 [2024-11-09 22:43:35,408 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:43:35,409 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:43:35,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 22:43:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-09 22:43:35,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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) [2024-11-09 22:43:35,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2024-11-09 22:43:35,438 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 11 [2024-11-09 22:43:35,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:43:35,438 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2024-11-09 22:43:35,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2024-11-09 22:43:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2024-11-09 22:43:35,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 22:43:35,440 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:43:35,440 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:43:35,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 22:43:35,441 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:43:35,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:43:35,441 INFO L85 PathProgramCache]: Analyzing trace with hash -2099581323, now seen corresponding path program 1 times [2024-11-09 22:43:35,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:43:35,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919584080] [2024-11-09 22:43:35,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:35,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:43:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 22:43:35,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:43:35,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919584080] [2024-11-09 22:43:35,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919584080] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:43:35,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:43:35,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:43:35,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091600868] [2024-11-09 22:43:35,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:43:35,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:43:35,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:43:35,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:43:35,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:43:35,671 INFO L87 Difference]: Start difference. First operand 25 states and 35 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, (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) [2024-11-09 22:43:35,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:43:35,753 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2024-11-09 22:43:35,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:43:35,758 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, (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 11 [2024-11-09 22:43:35,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:43:35,760 INFO L225 Difference]: With dead ends: 40 [2024-11-09 22:43:35,760 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 22:43:35,761 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:43:35,764 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:43:35,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 108 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:43:35,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 22:43:35,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2024-11-09 22:43:35,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 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) [2024-11-09 22:43:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2024-11-09 22:43:35,775 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 11 [2024-11-09 22:43:35,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:43:35,775 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2024-11-09 22:43:35,775 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, (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) [2024-11-09 22:43:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2024-11-09 22:43:35,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 22:43:35,776 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:43:35,776 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:43:35,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 22:43:35,777 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:43:35,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:43:35,777 INFO L85 PathProgramCache]: Analyzing trace with hash -909958482, now seen corresponding path program 1 times [2024-11-09 22:43:35,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:43:35,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131460130] [2024-11-09 22:43:35,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:35,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:43:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 22:43:35,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:43:35,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131460130] [2024-11-09 22:43:35,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131460130] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:43:35,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:43:35,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 22:43:35,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864677482] [2024-11-09 22:43:35,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:43:35,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 22:43:35,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:43:35,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 22:43:35,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 22:43:35,851 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-11-09 22:43:35,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:43:35,879 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2024-11-09 22:43:35,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 22:43:35,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 13 [2024-11-09 22:43:35,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:43:35,881 INFO L225 Difference]: With dead ends: 46 [2024-11-09 22:43:35,881 INFO L226 Difference]: Without dead ends: 31 [2024-11-09 22:43:35,883 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 [2024-11-09 22:43:35,884 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:43:35,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:43:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-09 22:43:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-09 22:43:35,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 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) [2024-11-09 22:43:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2024-11-09 22:43:35,894 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 13 [2024-11-09 22:43:35,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:43:35,894 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2024-11-09 22:43:35,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-11-09 22:43:35,895 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2024-11-09 22:43:35,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 22:43:35,895 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:43:35,895 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:43:35,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 22:43:35,896 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:43:35,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:43:35,896 INFO L85 PathProgramCache]: Analyzing trace with hash 2100820203, now seen corresponding path program 1 times [2024-11-09 22:43:35,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:43:35,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321672849] [2024-11-09 22:43:35,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:35,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:43:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:36,062 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-09 22:43:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 22:43:36,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:43:36,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321672849] [2024-11-09 22:43:36,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321672849] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:43:36,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:43:36,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:43:36,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151005021] [2024-11-09 22:43:36,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:43:36,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:43:36,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:43:36,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:43:36,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:43:36,081 INFO L87 Difference]: Start difference. First operand 31 states and 40 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, (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) [2024-11-09 22:43:36,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:43:36,149 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-11-09 22:43:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:43:36,150 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, (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 16 [2024-11-09 22:43:36,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:43:36,152 INFO L225 Difference]: With dead ends: 46 [2024-11-09 22:43:36,152 INFO L226 Difference]: Without dead ends: 43 [2024-11-09 22:43:36,152 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:43:36,156 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:43:36,156 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 105 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:43:36,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-09 22:43:36,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2024-11-09 22:43:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 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) [2024-11-09 22:43:36,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2024-11-09 22:43:36,171 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 16 [2024-11-09 22:43:36,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:43:36,172 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2024-11-09 22:43:36,172 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, (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) [2024-11-09 22:43:36,172 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2024-11-09 22:43:36,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 22:43:36,173 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:43:36,173 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:43:36,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 22:43:36,174 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:43:36,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:43:36,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1262954485, now seen corresponding path program 1 times [2024-11-09 22:43:36,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:43:36,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715902013] [2024-11-09 22:43:36,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:36,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:43:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:43:36,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32524286] [2024-11-09 22:43:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:36,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:43:36,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:43:36,209 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:43:36,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 22:43:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:36,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 22:43:36,285 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:43:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 22:43:36,400 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 22:43:36,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:43:36,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715902013] [2024-11-09 22:43:36,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:43:36,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32524286] [2024-11-09 22:43:36,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32524286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:43:36,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:43:36,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:43:36,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250438507] [2024-11-09 22:43:36,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:43:36,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:43:36,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:43:36,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:43:36,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:43:36,404 INFO L87 Difference]: Start difference. First operand 35 states and 43 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, (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) [2024-11-09 22:43:36,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:43:36,488 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2024-11-09 22:43:36,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:43:36,489 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, (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 21 [2024-11-09 22:43:36,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:43:36,490 INFO L225 Difference]: With dead ends: 65 [2024-11-09 22:43:36,491 INFO L226 Difference]: Without dead ends: 49 [2024-11-09 22:43:36,491 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:43:36,492 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:43:36,494 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 109 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:43:36,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-09 22:43:36,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-09 22:43:36,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 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) [2024-11-09 22:43:36,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-11-09 22:43:36,511 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 21 [2024-11-09 22:43:36,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:43:36,511 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-11-09 22:43:36,511 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, (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) [2024-11-09 22:43:36,511 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-11-09 22:43:36,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 22:43:36,512 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:43:36,512 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:43:36,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 22:43:36,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:43:36,720 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:43:36,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:43:36,720 INFO L85 PathProgramCache]: Analyzing trace with hash -55756711, now seen corresponding path program 1 times [2024-11-09 22:43:36,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:43:36,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793363099] [2024-11-09 22:43:36,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:36,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:43:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:36,801 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-09 22:43:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:36,807 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 22:43:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:36,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 22:43:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 22:43:36,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:43:36,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793363099] [2024-11-09 22:43:36,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793363099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:43:36,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:43:36,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:43:36,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62885665] [2024-11-09 22:43:36,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:43:36,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:43:36,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:43:36,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:43:36,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:43:36,819 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 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) [2024-11-09 22:43:36,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:43:36,856 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2024-11-09 22:43:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:43:36,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 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 29 [2024-11-09 22:43:36,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:43:36,859 INFO L225 Difference]: With dead ends: 69 [2024-11-09 22:43:36,860 INFO L226 Difference]: Without dead ends: 61 [2024-11-09 22:43:36,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:43:36,861 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:43:36,862 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 96 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:43:36,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-09 22:43:36,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2024-11-09 22:43:36,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.175) internal successors, (47), 41 states have internal predecessors, (47), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-09 22:43:36,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2024-11-09 22:43:36,876 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 29 [2024-11-09 22:43:36,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:43:36,877 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2024-11-09 22:43:36,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 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) [2024-11-09 22:43:36,878 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2024-11-09 22:43:36,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 22:43:36,879 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:43:36,879 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:43:36,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 22:43:36,879 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:43:36,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:43:36,881 INFO L85 PathProgramCache]: Analyzing trace with hash -23433476, now seen corresponding path program 1 times [2024-11-09 22:43:36,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:43:36,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346604577] [2024-11-09 22:43:36,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:36,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:43:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:43:36,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275545906] [2024-11-09 22:43:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:36,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:43:36,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:43:36,905 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:43:36,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 22:43:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:36,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 22:43:36,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:43:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 22:43:37,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:43:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 22:43:37,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:43:37,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346604577] [2024-11-09 22:43:37,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:43:37,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275545906] [2024-11-09 22:43:37,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275545906] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:43:37,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:43:37,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-09 22:43:37,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692560185] [2024-11-09 22:43:37,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:43:37,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 22:43:37,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:43:37,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 22:43:37,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-09 22:43:37,381 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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) [2024-11-09 22:43:37,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:43:37,525 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2024-11-09 22:43:37,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 22:43:37,525 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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 29 [2024-11-09 22:43:37,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:43:37,528 INFO L225 Difference]: With dead ends: 79 [2024-11-09 22:43:37,528 INFO L226 Difference]: Without dead ends: 76 [2024-11-09 22:43:37,528 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-09 22:43:37,531 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:43:37,531 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 116 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:43:37,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-09 22:43:37,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2024-11-09 22:43:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 49 states have internal predecessors, (57), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-09 22:43:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2024-11-09 22:43:37,549 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 29 [2024-11-09 22:43:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:43:37,549 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2024-11-09 22:43:37,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 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) [2024-11-09 22:43:37,550 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2024-11-09 22:43:37,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 22:43:37,551 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:43:37,551 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, 1, 1, 1, 1] [2024-11-09 22:43:37,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 22:43:37,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 22:43:37,756 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:43:37,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:43:37,756 INFO L85 PathProgramCache]: Analyzing trace with hash 646966983, now seen corresponding path program 1 times [2024-11-09 22:43:37,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:43:37,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121769290] [2024-11-09 22:43:37,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:37,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:43:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:37,833 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-09 22:43:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:37,840 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 22:43:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:37,847 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 22:43:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:37,859 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-09 22:43:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 22:43:37,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:43:37,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121769290] [2024-11-09 22:43:37,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121769290] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:43:37,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713534945] [2024-11-09 22:43:37,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:37,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:43:37,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:43:37,869 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:43:37,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 22:43:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:37,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 22:43:37,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:43:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 22:43:37,974 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:43:38,022 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 22:43:38,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713534945] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:43:38,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:43:38,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-09 22:43:38,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561218042] [2024-11-09 22:43:38,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:43:38,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 22:43:38,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:43:38,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 22:43:38,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-09 22:43:38,025 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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) [2024-11-09 22:43:38,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:43:38,165 INFO L93 Difference]: Finished difference Result 161 states and 196 transitions. [2024-11-09 22:43:38,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 22:43:38,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 36 [2024-11-09 22:43:38,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:43:38,167 INFO L225 Difference]: With dead ends: 161 [2024-11-09 22:43:38,167 INFO L226 Difference]: Without dead ends: 135 [2024-11-09 22:43:38,167 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-09 22:43:38,168 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 49 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:43:38,168 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 166 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:43:38,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-09 22:43:38,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 126. [2024-11-09 22:43:38,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 86 states have internal predecessors, (98), 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) [2024-11-09 22:43:38,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2024-11-09 22:43:38,196 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 36 [2024-11-09 22:43:38,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:43:38,197 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2024-11-09 22:43:38,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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) [2024-11-09 22:43:38,197 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2024-11-09 22:43:38,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 22:43:38,198 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:43:38,198 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:43:38,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 22:43:38,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:43:38,399 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:43:38,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:43:38,399 INFO L85 PathProgramCache]: Analyzing trace with hash 253378592, now seen corresponding path program 1 times [2024-11-09 22:43:38,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:43:38,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530335898] [2024-11-09 22:43:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:38,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:43:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:43:38,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5496194] [2024-11-09 22:43:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:38,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:43:38,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:43:38,418 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:43:38,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 22:43:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:38,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 22:43:38,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:43:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 22:43:38,588 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:43:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 22:43:38,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:43:38,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530335898] [2024-11-09 22:43:38,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:43:38,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5496194] [2024-11-09 22:43:38,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5496194] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 22:43:38,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 22:43:38,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-09 22:43:38,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524351311] [2024-11-09 22:43:38,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:43:38,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:43:38,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:43:38,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:43:38,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 22:43:38,680 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-11-09 22:43:38,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:43:38,775 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2024-11-09 22:43:38,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:43:38,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 39 [2024-11-09 22:43:38,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:43:38,777 INFO L225 Difference]: With dead ends: 150 [2024-11-09 22:43:38,777 INFO L226 Difference]: Without dead ends: 143 [2024-11-09 22:43:38,777 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 22:43:38,778 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:43:38,778 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 103 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:43:38,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-09 22:43:38,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 135. [2024-11-09 22:43:38,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 89 states have (on average 1.1685393258426966) internal successors, (104), 93 states have internal predecessors, (104), 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) [2024-11-09 22:43:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 158 transitions. [2024-11-09 22:43:38,798 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 158 transitions. Word has length 39 [2024-11-09 22:43:38,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:43:38,799 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 158 transitions. [2024-11-09 22:43:38,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-11-09 22:43:38,799 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 158 transitions. [2024-11-09 22:43:38,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 22:43:38,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:43:38,800 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, 1, 1, 1, 1] [2024-11-09 22:43:38,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 22:43:39,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:43:39,001 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:43:39,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:43:39,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1361005644, now seen corresponding path program 1 times [2024-11-09 22:43:39,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:43:39,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185299813] [2024-11-09 22:43:39,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:39,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:43:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:39,114 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-09 22:43:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:39,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 22:43:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:39,125 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 22:43:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:39,132 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 22:43:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:39,138 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 22:43:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:39,145 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-11-09 22:43:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-09 22:43:39,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:43:39,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185299813] [2024-11-09 22:43:39,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185299813] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:43:39,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 22:43:39,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 22:43:39,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733707997] [2024-11-09 22:43:39,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:43:39,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:43:39,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:43:39,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:43:39,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:43:39,156 INFO L87 Difference]: Start difference. First operand 135 states and 158 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2024-11-09 22:43:39,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:43:39,207 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2024-11-09 22:43:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:43:39,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 45 [2024-11-09 22:43:39,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:43:39,209 INFO L225 Difference]: With dead ends: 141 [2024-11-09 22:43:39,209 INFO L226 Difference]: Without dead ends: 121 [2024-11-09 22:43:39,209 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:43:39,210 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:43:39,210 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 122 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:43:39,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-09 22:43:39,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2024-11-09 22:43:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 80 states have (on average 1.175) internal successors, (94), 83 states have internal predecessors, (94), 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) [2024-11-09 22:43:39,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 142 transitions. [2024-11-09 22:43:39,235 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 142 transitions. Word has length 45 [2024-11-09 22:43:39,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:43:39,235 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 142 transitions. [2024-11-09 22:43:39,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2024-11-09 22:43:39,235 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 142 transitions. [2024-11-09 22:43:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-09 22:43:39,238 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:43:39,238 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, 1, 1, 1, 1] [2024-11-09 22:43:39,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 22:43:39,239 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:43:39,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:43:39,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1645453820, now seen corresponding path program 1 times [2024-11-09 22:43:39,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:43:39,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427882983] [2024-11-09 22:43:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:39,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:43:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:39,307 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-09 22:43:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:39,310 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 22:43:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:39,314 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 22:43:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:39,319 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 22:43:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:39,323 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 22:43:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:39,328 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-09 22:43:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:39,332 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-09 22:43:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-09 22:43:39,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:43:39,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427882983] [2024-11-09 22:43:39,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427882983] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:43:39,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322234287] [2024-11-09 22:43:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:39,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:43:39,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:43:39,340 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:43:39,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 22:43:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:39,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 22:43:39,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:43:39,451 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 22:43:39,451 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:43:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-09 22:43:39,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322234287] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:43:39,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:43:39,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 9 [2024-11-09 22:43:39,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857702086] [2024-11-09 22:43:39,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:43:39,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 22:43:39,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:43:39,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 22:43:39,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-09 22:43:39,532 INFO L87 Difference]: Start difference. First operand 121 states and 142 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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) [2024-11-09 22:43:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:43:39,690 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2024-11-09 22:43:39,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 22:43:39,691 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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 52 [2024-11-09 22:43:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:43:39,694 INFO L225 Difference]: With dead ends: 200 [2024-11-09 22:43:39,694 INFO L226 Difference]: Without dead ends: 178 [2024-11-09 22:43:39,694 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-09 22:43:39,695 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 53 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:43:39,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 145 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:43:39,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-09 22:43:39,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 171. [2024-11-09 22:43:39,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 113 states have (on average 1.176991150442478) internal successors, (133), 119 states have internal predecessors, (133), 37 states have call successors, (37), 21 states have call predecessors, (37), 20 states have return successors, (34), 30 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-09 22:43:39,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 204 transitions. [2024-11-09 22:43:39,718 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 204 transitions. Word has length 52 [2024-11-09 22:43:39,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:43:39,718 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 204 transitions. [2024-11-09 22:43:39,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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) [2024-11-09 22:43:39,718 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 204 transitions. [2024-11-09 22:43:39,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 22:43:39,719 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:43:39,719 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, 1, 1, 1, 1] [2024-11-09 22:43:39,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 22:43:39,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 22:43:39,920 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:43:39,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:43:39,920 INFO L85 PathProgramCache]: Analyzing trace with hash -646613615, now seen corresponding path program 1 times [2024-11-09 22:43:39,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:43:39,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427791883] [2024-11-09 22:43:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:39,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:43:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:43:39,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314328656] [2024-11-09 22:43:39,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:39,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:43:39,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:43:39,949 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:43:39,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 22:43:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:40,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 22:43:40,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:43:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-09 22:43:40,638 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:43:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-09 22:43:42,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:43:42,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427791883] [2024-11-09 22:43:42,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:43:42,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314328656] [2024-11-09 22:43:42,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314328656] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:43:42,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:43:42,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2024-11-09 22:43:42,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662746318] [2024-11-09 22:43:42,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:43:42,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 22:43:42,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:43:42,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 22:43:42,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-11-09 22:43:42,759 INFO L87 Difference]: Start difference. First operand 171 states and 204 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-09 22:43:44,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:43:44,060 INFO L93 Difference]: Finished difference Result 285 states and 363 transitions. [2024-11-09 22:43:44,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 22:43:44,061 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 61 [2024-11-09 22:43:44,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:43:44,063 INFO L225 Difference]: With dead ends: 285 [2024-11-09 22:43:44,063 INFO L226 Difference]: Without dead ends: 231 [2024-11-09 22:43:44,066 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2024-11-09 22:43:44,066 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 99 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 22:43:44,067 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 370 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 22:43:44,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-09 22:43:44,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 199. [2024-11-09 22:43:44,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 135 states have (on average 1.1851851851851851) internal successors, (160), 141 states have internal predecessors, (160), 39 states have call successors, (39), 24 states have call predecessors, (39), 24 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-09 22:43:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 236 transitions. [2024-11-09 22:43:44,104 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 236 transitions. Word has length 61 [2024-11-09 22:43:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:43:44,105 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 236 transitions. [2024-11-09 22:43:44,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 8 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-09 22:43:44,105 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 236 transitions. [2024-11-09 22:43:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-09 22:43:44,106 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:43:44,106 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, 1, 1, 1, 1] [2024-11-09 22:43:44,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 22:43:44,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:43:44,311 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:43:44,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:43:44,311 INFO L85 PathProgramCache]: Analyzing trace with hash -641848553, now seen corresponding path program 1 times [2024-11-09 22:43:44,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:43:44,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240028478] [2024-11-09 22:43:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:44,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:43:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:43:44,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754856007] [2024-11-09 22:43:44,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:44,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:43:44,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:43:44,346 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:43:44,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 22:43:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:44,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 22:43:44,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:43:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-09 22:43:44,893 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:43:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-09 22:43:45,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:43:45,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240028478] [2024-11-09 22:43:45,794 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:43:45,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754856007] [2024-11-09 22:43:45,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754856007] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:43:45,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:43:45,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-11-09 22:43:45,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224796983] [2024-11-09 22:43:45,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:43:45,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 22:43:45,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:43:45,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 22:43:45,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-11-09 22:43:45,796 INFO L87 Difference]: Start difference. First operand 199 states and 236 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-09 22:43:46,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:43:46,488 INFO L93 Difference]: Finished difference Result 290 states and 364 transitions. [2024-11-09 22:43:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 22:43:46,489 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 72 [2024-11-09 22:43:46,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:43:46,491 INFO L225 Difference]: With dead ends: 290 [2024-11-09 22:43:46,491 INFO L226 Difference]: Without dead ends: 248 [2024-11-09 22:43:46,492 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2024-11-09 22:43:46,493 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 66 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 22:43:46,493 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 529 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 22:43:46,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-09 22:43:46,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 210. [2024-11-09 22:43:46,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 143 states have (on average 1.1958041958041958) internal successors, (171), 146 states have internal predecessors, (171), 42 states have call successors, (42), 25 states have call predecessors, (42), 24 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-09 22:43:46,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 253 transitions. [2024-11-09 22:43:46,545 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 253 transitions. Word has length 72 [2024-11-09 22:43:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:43:46,546 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 253 transitions. [2024-11-09 22:43:46,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 10 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-09 22:43:46,546 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 253 transitions. [2024-11-09 22:43:46,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-09 22:43:46,547 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:43:46,547 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:43:46,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 22:43:46,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:43:46,748 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:43:46,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:43:46,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1711473285, now seen corresponding path program 2 times [2024-11-09 22:43:46,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:43:46,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006190274] [2024-11-09 22:43:46,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:46,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:43:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:46,907 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-09 22:43:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:46,910 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 22:43:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:46,912 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 22:43:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:46,917 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 22:43:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:46,922 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 22:43:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:46,924 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-09 22:43:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:46,927 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-09 22:43:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:46,931 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 22:43:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:46,934 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-11-09 22:43:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:46,939 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-09 22:43:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-09 22:43:46,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:43:46,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006190274] [2024-11-09 22:43:46,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006190274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:43:46,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227642555] [2024-11-09 22:43:46,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 22:43:46,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:43:46,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:43:46,946 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:43:46,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 22:43:47,009 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 22:43:47,009 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:43:47,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 22:43:47,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:43:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-09 22:43:47,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:43:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-09 22:43:47,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227642555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:43:47,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:43:47,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-11-09 22:43:47,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124878125] [2024-11-09 22:43:47,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:43:47,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:43:47,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:43:47,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:43:47,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:43:47,139 INFO L87 Difference]: Start difference. First operand 210 states and 253 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 22:43:47,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:43:47,216 INFO L93 Difference]: Finished difference Result 235 states and 287 transitions. [2024-11-09 22:43:47,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 22:43:47,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 75 [2024-11-09 22:43:47,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:43:47,218 INFO L225 Difference]: With dead ends: 235 [2024-11-09 22:43:47,218 INFO L226 Difference]: Without dead ends: 205 [2024-11-09 22:43:47,218 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 22:43:47,219 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:43:47,219 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 135 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:43:47,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-09 22:43:47,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2024-11-09 22:43:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 138 states have (on average 1.1884057971014492) internal successors, (164), 141 states have internal predecessors, (164), 42 states have call successors, (42), 25 states have call predecessors, (42), 24 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-09 22:43:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 246 transitions. [2024-11-09 22:43:47,258 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 246 transitions. Word has length 75 [2024-11-09 22:43:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:43:47,259 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 246 transitions. [2024-11-09 22:43:47,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 22:43:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 246 transitions. [2024-11-09 22:43:47,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-09 22:43:47,260 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:43:47,260 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, 1, 1, 1, 1] [2024-11-09 22:43:47,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 22:43:47,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 22:43:47,465 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:43:47,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:43:47,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1640886345, now seen corresponding path program 1 times [2024-11-09 22:43:47,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:43:47,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523309296] [2024-11-09 22:43:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:47,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:43:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:47,709 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-09 22:43:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:47,713 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 22:43:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:47,716 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 22:43:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:47,718 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 22:43:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:47,722 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 22:43:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:47,726 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-09 22:43:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:47,729 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-09 22:43:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:47,733 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 22:43:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:47,738 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-11-09 22:43:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:47,742 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-11-09 22:43:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:47,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-11-09 22:43:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-09 22:43:47,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:43:47,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523309296] [2024-11-09 22:43:47,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523309296] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:43:47,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15987740] [2024-11-09 22:43:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:47,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:43:47,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:43:47,752 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:43:47,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 22:43:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:47,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 22:43:47,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:43:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-09 22:43:48,123 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:43:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-11-09 22:43:48,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15987740] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:43:48,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:43:48,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 17 [2024-11-09 22:43:48,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902677428] [2024-11-09 22:43:48,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:43:48,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 22:43:48,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:43:48,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 22:43:48,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-11-09 22:43:48,480 INFO L87 Difference]: Start difference. First operand 205 states and 246 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 15 states have internal predecessors, (50), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2024-11-09 22:43:48,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:43:48,724 INFO L93 Difference]: Finished difference Result 220 states and 267 transitions. [2024-11-09 22:43:48,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 22:43:48,724 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 15 states have internal predecessors, (50), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 77 [2024-11-09 22:43:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:43:48,726 INFO L225 Difference]: With dead ends: 220 [2024-11-09 22:43:48,726 INFO L226 Difference]: Without dead ends: 194 [2024-11-09 22:43:48,726 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-11-09 22:43:48,727 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 30 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:43:48,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 377 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:43:48,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-11-09 22:43:48,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 186. [2024-11-09 22:43:48,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 125 states have (on average 1.2) internal successors, (150), 128 states have internal predecessors, (150), 38 states have call successors, (38), 23 states have call predecessors, (38), 22 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-09 22:43:48,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 224 transitions. [2024-11-09 22:43:48,764 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 224 transitions. Word has length 77 [2024-11-09 22:43:48,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:43:48,764 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 224 transitions. [2024-11-09 22:43:48,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 15 states have internal predecessors, (50), 9 states have call successors, (30), 3 states have call predecessors, (30), 1 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2024-11-09 22:43:48,764 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 224 transitions. [2024-11-09 22:43:48,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 22:43:48,765 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:43:48,765 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:43:48,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 22:43:48,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 22:43:48,970 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:43:48,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:43:48,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1787073206, now seen corresponding path program 1 times [2024-11-09 22:43:48,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:43:48,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947779052] [2024-11-09 22:43:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:48,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:43:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,043 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-09 22:43:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,047 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 22:43:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,050 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 22:43:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,054 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 22:43:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,057 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 22:43:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,059 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-09 22:43:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,061 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-09 22:43:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,063 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 22:43:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,067 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-09 22:43:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,071 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-09 22:43:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,073 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-09 22:43:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,076 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-11-09 22:43:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-11-09 22:43:49,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:43:49,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947779052] [2024-11-09 22:43:49,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947779052] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:43:49,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13227901] [2024-11-09 22:43:49,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:49,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:43:49,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:43:49,081 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:43:49,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 22:43:49,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 22:43:49,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:43:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-09 22:43:49,177 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 22:43:49,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13227901] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 22:43:49,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 22:43:49,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-11-09 22:43:49,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408276034] [2024-11-09 22:43:49,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 22:43:49,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 22:43:49,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:43:49,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 22:43:49,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:43:49,180 INFO L87 Difference]: Start difference. First operand 186 states and 224 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-09 22:43:49,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:43:49,273 INFO L93 Difference]: Finished difference Result 208 states and 251 transitions. [2024-11-09 22:43:49,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 22:43:49,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 81 [2024-11-09 22:43:49,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:43:49,275 INFO L225 Difference]: With dead ends: 208 [2024-11-09 22:43:49,275 INFO L226 Difference]: Without dead ends: 187 [2024-11-09 22:43:49,276 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-09 22:43:49,276 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 16 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 22:43:49,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 106 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 22:43:49,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-11-09 22:43:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 179. [2024-11-09 22:43:49,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 121 states have (on average 1.1735537190082646) internal successors, (142), 123 states have internal predecessors, (142), 36 states have call successors, (36), 21 states have call predecessors, (36), 21 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2024-11-09 22:43:49,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 213 transitions. [2024-11-09 22:43:49,315 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 213 transitions. Word has length 81 [2024-11-09 22:43:49,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:43:49,315 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 213 transitions. [2024-11-09 22:43:49,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-09 22:43:49,315 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 213 transitions. [2024-11-09 22:43:49,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-09 22:43:49,316 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:43:49,316 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:43:49,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 22:43:49,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 22:43:49,517 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:43:49,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:43:49,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1894266266, now seen corresponding path program 2 times [2024-11-09 22:43:49,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:43:49,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547848299] [2024-11-09 22:43:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:49,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:43:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,647 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-09 22:43:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 22:43:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,652 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 22:43:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,654 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 22:43:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,656 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 22:43:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,659 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-09 22:43:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,662 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-09 22:43:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,664 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 22:43:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,666 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-09 22:43:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,669 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-09 22:43:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,670 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-09 22:43:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,673 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-11-09 22:43:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,675 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-11-09 22:43:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-11-09 22:43:49,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:43:49,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547848299] [2024-11-09 22:43:49,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547848299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:43:49,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923398201] [2024-11-09 22:43:49,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 22:43:49,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:43:49,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:43:49,680 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:43:49,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 22:43:49,740 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 22:43:49,740 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:43:49,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 22:43:49,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:43:49,833 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 22:43:49,833 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:43:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-11-09 22:43:49,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923398201] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:43:49,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:43:49,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 8 [2024-11-09 22:43:49,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256925726] [2024-11-09 22:43:49,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:43:49,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 22:43:49,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:43:49,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 22:43:49,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-09 22:43:49,939 INFO L87 Difference]: Start difference. First operand 179 states and 213 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2024-11-09 22:43:50,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:43:50,051 INFO L93 Difference]: Finished difference Result 250 states and 310 transitions. [2024-11-09 22:43:50,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 22:43:50,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 90 [2024-11-09 22:43:50,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:43:50,054 INFO L225 Difference]: With dead ends: 250 [2024-11-09 22:43:50,055 INFO L226 Difference]: Without dead ends: 181 [2024-11-09 22:43:50,055 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 199 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-11-09 22:43:50,057 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 10 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:43:50,058 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 142 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 22:43:50,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-09 22:43:50,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2024-11-09 22:43:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 123 states have (on average 1.170731707317073) internal successors, (144), 125 states have internal predecessors, (144), 36 states have call successors, (36), 21 states have call predecessors, (36), 21 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2024-11-09 22:43:50,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 215 transitions. [2024-11-09 22:43:50,107 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 215 transitions. Word has length 90 [2024-11-09 22:43:50,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:43:50,108 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 215 transitions. [2024-11-09 22:43:50,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 5 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2024-11-09 22:43:50,108 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 215 transitions. [2024-11-09 22:43:50,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-09 22:43:50,109 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:43:50,109 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 22:43:50,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 22:43:50,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 22:43:50,310 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:43:50,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:43:50,310 INFO L85 PathProgramCache]: Analyzing trace with hash 952840387, now seen corresponding path program 1 times [2024-11-09 22:43:50,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:43:50,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288641382] [2024-11-09 22:43:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:50,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:43:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 22:43:50,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866191092] [2024-11-09 22:43:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:43:50,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:43:50,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:43:50,356 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:43:50,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 22:43:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:43:50,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-09 22:43:50,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:43:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 25 proven. 65 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-09 22:43:51,791 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:44:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 25 proven. 65 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-09 22:44:36,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:44:36,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288641382] [2024-11-09 22:44:36,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 22:44:36,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866191092] [2024-11-09 22:44:36,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866191092] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:44:36,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 22:44:36,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2024-11-09 22:44:36,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410432451] [2024-11-09 22:44:36,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 22:44:36,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 22:44:36,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:44:36,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 22:44:36,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2024-11-09 22:44:36,420 INFO L87 Difference]: Start difference. First operand 181 states and 215 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 23 states have internal predecessors, (57), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2024-11-09 22:44:40,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 22:44:40,480 INFO L93 Difference]: Finished difference Result 242 states and 308 transitions. [2024-11-09 22:44:40,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 22:44:40,481 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 23 states have internal predecessors, (57), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) Word has length 93 [2024-11-09 22:44:40,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 22:44:40,484 INFO L225 Difference]: With dead ends: 242 [2024-11-09 22:44:40,484 INFO L226 Difference]: Without dead ends: 217 [2024-11-09 22:44:40,484 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2024-11-09 22:44:40,485 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 41 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-09 22:44:40,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 472 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-09 22:44:40,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-11-09 22:44:40,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 193. [2024-11-09 22:44:40,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 130 states have (on average 1.1846153846153846) internal successors, (154), 133 states have internal predecessors, (154), 41 states have call successors, (41), 21 states have call predecessors, (41), 21 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-09 22:44:40,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 235 transitions. [2024-11-09 22:44:40,534 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 235 transitions. Word has length 93 [2024-11-09 22:44:40,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 22:44:40,535 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 235 transitions. [2024-11-09 22:44:40,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 23 states have internal predecessors, (57), 13 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2024-11-09 22:44:40,535 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 235 transitions. [2024-11-09 22:44:40,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-09 22:44:40,536 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 22:44:40,536 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, 1, 1, 1, 1] [2024-11-09 22:44:40,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 22:44:40,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 22:44:40,737 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 22:44:40,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 22:44:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash 985163622, now seen corresponding path program 3 times [2024-11-09 22:44:40,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 22:44:40,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752173865] [2024-11-09 22:44:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 22:44:40,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 22:44:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:44:40,885 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-09 22:44:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:44:40,888 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 22:44:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:44:40,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-09 22:44:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:44:40,892 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 22:44:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:44:40,894 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-09 22:44:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:44:40,897 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-09 22:44:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:44:40,899 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-11-09 22:44:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:44:40,901 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 22:44:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:44:40,903 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-09 22:44:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:44:40,910 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-11-09 22:44:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:44:40,915 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-11-09 22:44:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:44:40,919 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-11-09 22:44:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:44:40,922 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-11-09 22:44:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 22:44:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-11-09 22:44:40,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 22:44:40,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752173865] [2024-11-09 22:44:40,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752173865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 22:44:40,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382695993] [2024-11-09 22:44:40,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 22:44:40,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 22:44:40,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 22:44:40,937 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 22:44:40,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 22:44:41,006 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 22:44:41,006 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 22:44:41,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 22:44:41,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 22:44:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-09 22:44:41,606 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 22:44:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-09 22:44:57,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382695993] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 22:44:57,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 22:44:57,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 12] total 30 [2024-11-09 22:44:57,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804124735] [2024-11-09 22:44:57,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 22:44:57,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-09 22:44:57,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 22:44:57,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-09 22:44:57,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2024-11-09 22:44:57,487 INFO L87 Difference]: Start difference. First operand 193 states and 235 transitions. Second operand has 30 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 17 states have call successors, (42), 4 states have call predecessors, (42), 2 states have return successors, (39), 14 states have call predecessors, (39), 14 states have call successors, (39)