./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --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 0724aefed4fd629206cc51e19e964e04af92729823366947a0cfe01fe4e4d102 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 12:27:54,294 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 12:27:54,370 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 12:27:54,375 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 12:27:54,376 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 12:27:54,406 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 12:27:54,408 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 12:27:54,409 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 12:27:54,410 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 12:27:54,411 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 12:27:54,411 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 12:27:54,412 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 12:27:54,412 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 12:27:54,414 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 12:27:54,415 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 12:27:54,415 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 12:27:54,416 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 12:27:54,416 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 12:27:54,416 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 12:27:54,416 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 12:27:54,417 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 12:27:54,421 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 12:27:54,422 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 12:27:54,422 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 12:27:54,422 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 12:27:54,423 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 12:27:54,423 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 12:27:54,423 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 12:27:54,423 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 12:27:54,424 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 12:27:54,424 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 12:27:54,424 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 12:27:54,424 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:27:54,425 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 12:27:54,425 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 12:27:54,425 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 12:27:54,426 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 12:27:54,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 12:27:54,427 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 12:27:54,427 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 12:27:54,427 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 12:27:54,428 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 12:27:54,428 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/certificate-witnesses-artifact/automizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0724aefed4fd629206cc51e19e964e04af92729823366947a0cfe01fe4e4d102 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 12:27:54,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 12:27:54,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 12:27:54,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 12:27:54,737 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 12:27:54,738 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 12:27:54,740 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2024-09-21 12:27:56,218 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 12:27:56,402 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 12:27:56,402 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2024-09-21 12:27:56,413 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/4f49aef2a/69fd91ad258646f5bd8795138239fb90/FLAGa2b4c0af3 [2024-09-21 12:27:56,783 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/4f49aef2a/69fd91ad258646f5bd8795138239fb90 [2024-09-21 12:27:56,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 12:27:56,788 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 12:27:56,789 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 12:27:56,789 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 12:27:56,796 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 12:27:56,797 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:27:56" (1/1) ... [2024-09-21 12:27:56,798 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39cdb4d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:56, skipping insertion in model container [2024-09-21 12:27:56,798 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:27:56" (1/1) ... [2024-09-21 12:27:56,819 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 12:27:56,981 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c[946,959] [2024-09-21 12:27:56,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:27:57,006 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 12:27:57,022 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c[946,959] [2024-09-21 12:27:57,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:27:57,040 INFO L204 MainTranslator]: Completed translation [2024-09-21 12:27:57,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:57 WrapperNode [2024-09-21 12:27:57,041 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 12:27:57,042 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 12:27:57,043 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 12:27:57,043 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 12:27:57,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:57" (1/1) ... [2024-09-21 12:27:57,055 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:57" (1/1) ... [2024-09-21 12:27:57,063 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 12:27:57,064 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 12:27:57,065 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 12:27:57,065 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 12:27:57,065 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 12:27:57,074 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:57" (1/1) ... [2024-09-21 12:27:57,075 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:57" (1/1) ... [2024-09-21 12:27:57,080 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:57" (1/1) ... [2024-09-21 12:27:57,096 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]. [2024-09-21 12:27:57,096 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:57" (1/1) ... [2024-09-21 12:27:57,097 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:57" (1/1) ... [2024-09-21 12:27:57,103 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:57" (1/1) ... [2024-09-21 12:27:57,105 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:57" (1/1) ... [2024-09-21 12:27:57,106 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:57" (1/1) ... [2024-09-21 12:27:57,106 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:57" (1/1) ... [2024-09-21 12:27:57,113 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 12:27:57,114 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 12:27:57,114 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 12:27:57,114 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 12:27:57,115 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:57" (1/1) ... [2024-09-21 12:27:57,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:27:57,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:27:57,151 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-21 12:27:57,155 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-21 12:27:57,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 12:27:57,208 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 12:27:57,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 12:27:57,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 12:27:57,209 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-09-21 12:27:57,209 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-09-21 12:27:57,209 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-09-21 12:27:57,211 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-09-21 12:27:57,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 12:27:57,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 12:27:57,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 12:27:57,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 12:27:57,282 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 12:27:57,285 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 12:27:57,505 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-21 12:27:57,505 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 12:27:57,543 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 12:27:57,543 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-21 12:27:57,544 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:27:57 BoogieIcfgContainer [2024-09-21 12:27:57,544 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 12:27:57,547 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 12:27:57,547 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 12:27:57,550 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 12:27:57,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:27:56" (1/3) ... [2024-09-21 12:27:57,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fab9a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:27:57, skipping insertion in model container [2024-09-21 12:27:57,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:27:57" (2/3) ... [2024-09-21 12:27:57,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fab9a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:27:57, skipping insertion in model container [2024-09-21 12:27:57,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:27:57" (3/3) ... [2024-09-21 12:27:57,556 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2024-09-21 12:27:57,572 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 12:27:57,573 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 12:27:57,630 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 12:27:57,636 INFO L336 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=All, 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;@6a253908, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 12:27:57,638 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 12:27:57,642 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-21 12:27:57,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-21 12:27:57,652 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:27:57,652 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:27:57,653 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:27:57,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:27:57,660 INFO L85 PathProgramCache]: Analyzing trace with hash -685851838, now seen corresponding path program 1 times [2024-09-21 12:27:57,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:27:57,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327074638] [2024-09-21 12:27:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:27:57,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:27:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:27:57,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:27:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:27:57,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:27:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:27:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:27:57,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:27:57,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327074638] [2024-09-21 12:27:57,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327074638] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:27:57,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:27:57,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 12:27:57,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485712114] [2024-09-21 12:27:57,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:27:57,981 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 12:27:57,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:27:58,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 12:27:58,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 12:27:58,010 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-21 12:27:58,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:27:58,123 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-09-21 12:27:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 12:27:58,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2024-09-21 12:27:58,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:27:58,134 INFO L225 Difference]: With dead ends: 44 [2024-09-21 12:27:58,134 INFO L226 Difference]: Without dead ends: 32 [2024-09-21 12:27:58,136 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 12:27:58,139 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:27:58,140 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 103 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:27:58,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-21 12:27:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2024-09-21 12:27:58,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-21 12:27:58,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-09-21 12:27:58,177 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2024-09-21 12:27:58,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:27:58,178 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-09-21 12:27:58,178 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-21 12:27:58,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:27:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-09-21 12:27:58,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-21 12:27:58,180 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:27:58,180 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:27:58,181 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 12:27:58,181 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:27:58,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:27:58,182 INFO L85 PathProgramCache]: Analyzing trace with hash 924954813, now seen corresponding path program 1 times [2024-09-21 12:27:58,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:27:58,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165673409] [2024-09-21 12:27:58,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:27:58,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:27:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:27:58,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:27:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:27:58,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:27:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:27:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:27:58,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:27:58,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165673409] [2024-09-21 12:27:58,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165673409] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:27:58,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:27:58,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 12:27:58,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573187377] [2024-09-21 12:27:58,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:27:58,338 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 12:27:58,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:27:58,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 12:27:58,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 12:27:58,341 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-21 12:27:58,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:27:58,425 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2024-09-21 12:27:58,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 12:27:58,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2024-09-21 12:27:58,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:27:58,428 INFO L225 Difference]: With dead ends: 36 [2024-09-21 12:27:58,428 INFO L226 Difference]: Without dead ends: 32 [2024-09-21 12:27:58,428 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 12:27:58,429 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:27:58,430 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 88 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:27:58,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-21 12:27:58,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2024-09-21 12:27:58,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-21 12:27:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-09-21 12:27:58,440 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2024-09-21 12:27:58,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:27:58,440 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-09-21 12:27:58,440 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-21 12:27:58,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:27:58,441 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-09-21 12:27:58,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-21 12:27:58,442 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:27:58,442 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:27:58,443 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-21 12:27:58,443 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:27:58,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:27:58,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1782416332, now seen corresponding path program 1 times [2024-09-21 12:27:58,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:27:58,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918484463] [2024-09-21 12:27:58,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:27:58,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:27:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:27:58,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:27:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:27:58,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:27:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:27:58,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:27:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:27:58,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-21 12:27:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:27:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:27:58,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:27:58,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918484463] [2024-09-21 12:27:58,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918484463] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:27:58,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877697081] [2024-09-21 12:27:58,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:27:58,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:27:58,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:27:58,611 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:27:58,613 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 12:27:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:27:58,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-21 12:27:58,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:27:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:27:58,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:27:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:27:59,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877697081] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:27:59,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:27:59,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2024-09-21 12:27:59,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667338403] [2024-09-21 12:27:59,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:27:59,043 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-21 12:27:59,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:27:59,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-21 12:27:59,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-09-21 12:27:59,045 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-21 12:27:59,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:27:59,202 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2024-09-21 12:27:59,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 12:27:59,203 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 8 states have call successors, (9) Word has length 26 [2024-09-21 12:27:59,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:27:59,204 INFO L225 Difference]: With dead ends: 58 [2024-09-21 12:27:59,204 INFO L226 Difference]: Without dead ends: 34 [2024-09-21 12:27:59,205 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-09-21 12:27:59,206 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:27:59,207 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 160 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:27:59,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-21 12:27:59,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-09-21 12:27:59,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-21 12:27:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2024-09-21 12:27:59,221 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2024-09-21 12:27:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:27:59,222 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2024-09-21 12:27:59,222 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-21 12:27:59,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:27:59,222 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2024-09-21 12:27:59,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-21 12:27:59,223 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:27:59,224 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:27:59,238 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 12:27:59,425 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:27:59,426 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:27:59,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:27:59,426 INFO L85 PathProgramCache]: Analyzing trace with hash -836643613, now seen corresponding path program 1 times [2024-09-21 12:27:59,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:27:59,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873948967] [2024-09-21 12:27:59,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:27:59,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:27:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:27:59,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:27:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:27:59,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:27:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:27:59,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:27:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:27:59,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 12:27:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:27:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:27:59,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:27:59,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873948967] [2024-09-21 12:27:59,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873948967] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:27:59,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18863667] [2024-09-21 12:27:59,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:27:59,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:27:59,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:27:59,636 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:27:59,637 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 12:27:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:27:59,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-21 12:27:59,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:27:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:27:59,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:28:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:28:00,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18863667] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:28:00,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:28:00,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-09-21 12:28:00,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548634808] [2024-09-21 12:28:00,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:28:00,004 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-21 12:28:00,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:28:00,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-21 12:28:00,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-09-21 12:28:00,005 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-21 12:28:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:28:00,235 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2024-09-21 12:28:00,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 12:28:00,238 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Word has length 27 [2024-09-21 12:28:00,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:28:00,240 INFO L225 Difference]: With dead ends: 56 [2024-09-21 12:28:00,241 INFO L226 Difference]: Without dead ends: 52 [2024-09-21 12:28:00,242 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-09-21 12:28:00,244 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:28:00,246 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 182 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:28:00,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-21 12:28:00,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2024-09-21 12:28:00,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-21 12:28:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2024-09-21 12:28:00,269 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 27 [2024-09-21 12:28:00,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:28:00,271 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2024-09-21 12:28:00,271 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-21 12:28:00,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:28:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2024-09-21 12:28:00,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-21 12:28:00,276 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:28:00,276 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:28:00,295 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 12:28:00,480 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:28:00,481 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:28:00,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:28:00,481 INFO L85 PathProgramCache]: Analyzing trace with hash -925704228, now seen corresponding path program 1 times [2024-09-21 12:28:00,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:28:00,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757383359] [2024-09-21 12:28:00,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:28:00,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:28:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:00,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:28:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:00,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:28:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:00,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:00,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:00,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-21 12:28:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:00,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 12:28:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 12:28:00,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:28:00,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757383359] [2024-09-21 12:28:00,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757383359] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:28:00,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425256113] [2024-09-21 12:28:00,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:28:00,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:28:00,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:28:00,685 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:28:00,688 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 12:28:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:00,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-21 12:28:00,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:28:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-21 12:28:00,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:28:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:28:01,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425256113] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:28:01,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:28:01,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2024-09-21 12:28:01,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187150266] [2024-09-21 12:28:01,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:28:01,145 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-21 12:28:01,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:28:01,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-21 12:28:01,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-09-21 12:28:01,146 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (15), 1 states have call predecessors, (15), 5 states have return successors, (14), 4 states have call predecessors, (14), 11 states have call successors, (14) [2024-09-21 12:28:01,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:28:01,418 INFO L93 Difference]: Finished difference Result 112 states and 180 transitions. [2024-09-21 12:28:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-21 12:28:01,419 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (15), 1 states have call predecessors, (15), 5 states have return successors, (14), 4 states have call predecessors, (14), 11 states have call successors, (14) Word has length 39 [2024-09-21 12:28:01,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:28:01,421 INFO L225 Difference]: With dead ends: 112 [2024-09-21 12:28:01,421 INFO L226 Difference]: Without dead ends: 68 [2024-09-21 12:28:01,423 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2024-09-21 12:28:01,423 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 38 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:28:01,424 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 200 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:28:01,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-21 12:28:01,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2024-09-21 12:28:01,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 14 states have call successors, (14), 7 states have call predecessors, (14), 10 states have return successors, (30), 14 states have call predecessors, (30), 13 states have call successors, (30) [2024-09-21 12:28:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2024-09-21 12:28:01,439 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2024-09-21 12:28:01,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:28:01,439 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2024-09-21 12:28:01,440 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (15), 1 states have call predecessors, (15), 5 states have return successors, (14), 4 states have call predecessors, (14), 11 states have call successors, (14) [2024-09-21 12:28:01,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:28:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2024-09-21 12:28:01,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-21 12:28:01,442 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:28:01,442 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:28:01,460 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 12:28:01,642 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:28:01,643 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:28:01,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:28:01,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1261961157, now seen corresponding path program 1 times [2024-09-21 12:28:01,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:28:01,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936234356] [2024-09-21 12:28:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:28:01,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:28:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:01,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:28:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:01,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:28:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:01,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:01,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:01,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 12:28:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:01,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-21 12:28:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-21 12:28:01,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:28:01,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936234356] [2024-09-21 12:28:01,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936234356] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:28:01,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460136319] [2024-09-21 12:28:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:28:01,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:28:01,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:28:01,863 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:28:01,864 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 12:28:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:01,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-21 12:28:01,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:28:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 12:28:01,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:28:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:28:02,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460136319] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:28:02,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:28:02,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2024-09-21 12:28:02,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210361063] [2024-09-21 12:28:02,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:28:02,309 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-21 12:28:02,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:28:02,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-21 12:28:02,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-09-21 12:28:02,312 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 10 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-21 12:28:02,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:28:02,652 INFO L93 Difference]: Finished difference Result 182 states and 328 transitions. [2024-09-21 12:28:02,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-21 12:28:02,653 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 10 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) Word has length 40 [2024-09-21 12:28:02,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:28:02,659 INFO L225 Difference]: With dead ends: 182 [2024-09-21 12:28:02,659 INFO L226 Difference]: Without dead ends: 122 [2024-09-21 12:28:02,661 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2024-09-21 12:28:02,662 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 37 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:28:02,663 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 268 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:28:02,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-09-21 12:28:02,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 103. [2024-09-21 12:28:02,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 64 states have (on average 1.21875) internal successors, (78), 67 states have internal predecessors, (78), 23 states have call successors, (23), 9 states have call predecessors, (23), 15 states have return successors, (64), 26 states have call predecessors, (64), 22 states have call successors, (64) [2024-09-21 12:28:02,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 165 transitions. [2024-09-21 12:28:02,690 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 165 transitions. Word has length 40 [2024-09-21 12:28:02,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:28:02,691 INFO L474 AbstractCegarLoop]: Abstraction has 103 states and 165 transitions. [2024-09-21 12:28:02,691 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 10 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-21 12:28:02,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:28:02,692 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 165 transitions. [2024-09-21 12:28:02,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-21 12:28:02,694 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:28:02,694 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:28:02,712 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 12:28:02,895 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:28:02,895 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:28:02,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:28:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1624375296, now seen corresponding path program 1 times [2024-09-21 12:28:02,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:28:02,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165982984] [2024-09-21 12:28:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:28:02,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:28:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:02,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:28:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:02,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:28:02,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:02,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:03,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:03,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:03,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 12:28:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:03,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-21 12:28:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:03,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-21 12:28:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-21 12:28:03,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:28:03,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165982984] [2024-09-21 12:28:03,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165982984] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:28:03,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972000720] [2024-09-21 12:28:03,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:28:03,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:28:03,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:28:03,130 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:28:03,131 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 12:28:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:03,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-21 12:28:03,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:28:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-21 12:28:03,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:28:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-21 12:28:03,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972000720] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:28:03,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:28:03,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 16 [2024-09-21 12:28:03,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162612467] [2024-09-21 12:28:03,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:28:03,579 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-21 12:28:03,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:28:03,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-21 12:28:03,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-09-21 12:28:03,581 INFO L87 Difference]: Start difference. First operand 103 states and 165 transitions. Second operand has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 10 states have call successors, (17), 1 states have call predecessors, (17), 6 states have return successors, (18), 9 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-21 12:28:03,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:28:03,858 INFO L93 Difference]: Finished difference Result 265 states and 513 transitions. [2024-09-21 12:28:03,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-21 12:28:03,859 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 10 states have call successors, (17), 1 states have call predecessors, (17), 6 states have return successors, (18), 9 states have call predecessors, (18), 10 states have call successors, (18) Word has length 54 [2024-09-21 12:28:03,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:28:03,866 INFO L225 Difference]: With dead ends: 265 [2024-09-21 12:28:03,867 INFO L226 Difference]: Without dead ends: 168 [2024-09-21 12:28:03,869 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-09-21 12:28:03,870 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:28:03,871 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 185 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:28:03,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-09-21 12:28:03,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 142. [2024-09-21 12:28:03,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 89 states have (on average 1.202247191011236) internal successors, (107), 91 states have internal predecessors, (107), 33 states have call successors, (33), 12 states have call predecessors, (33), 19 states have return successors, (104), 38 states have call predecessors, (104), 32 states have call successors, (104) [2024-09-21 12:28:03,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 244 transitions. [2024-09-21 12:28:03,907 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 244 transitions. Word has length 54 [2024-09-21 12:28:03,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:28:03,907 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 244 transitions. [2024-09-21 12:28:03,908 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 10 states have call successors, (17), 1 states have call predecessors, (17), 6 states have return successors, (18), 9 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-21 12:28:03,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:28:03,908 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 244 transitions. [2024-09-21 12:28:03,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-21 12:28:03,911 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:28:03,911 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:28:03,930 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-21 12:28:04,115 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-21 12:28:04,116 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:28:04,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:28:04,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1735862535, now seen corresponding path program 1 times [2024-09-21 12:28:04,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:28:04,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697752372] [2024-09-21 12:28:04,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:28:04,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:28:04,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:04,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:28:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:04,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:28:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:04,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:04,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:04,336 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:04,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 12:28:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:04,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-21 12:28:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:04,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-21 12:28:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-21 12:28:04,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:28:04,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697752372] [2024-09-21 12:28:04,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697752372] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:28:04,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620223630] [2024-09-21 12:28:04,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:28:04,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:28:04,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:28:04,376 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:28:04,378 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 12:28:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:04,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-21 12:28:04,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:28:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-21 12:28:04,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:28:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-21 12:28:04,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620223630] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:28:04,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:28:04,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 17 [2024-09-21 12:28:04,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194957147] [2024-09-21 12:28:04,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:28:04,687 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-21 12:28:04,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:28:04,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-21 12:28:04,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-09-21 12:28:04,688 INFO L87 Difference]: Start difference. First operand 142 states and 244 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 8 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2024-09-21 12:28:05,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:28:05,037 INFO L93 Difference]: Finished difference Result 347 states and 700 transitions. [2024-09-21 12:28:05,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-21 12:28:05,038 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 8 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) Word has length 55 [2024-09-21 12:28:05,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:28:05,041 INFO L225 Difference]: With dead ends: 347 [2024-09-21 12:28:05,041 INFO L226 Difference]: Without dead ends: 120 [2024-09-21 12:28:05,044 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-09-21 12:28:05,044 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 40 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:28:05,045 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 286 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:28:05,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-21 12:28:05,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2024-09-21 12:28:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 61 states have (on average 1.180327868852459) internal successors, (72), 62 states have internal predecessors, (72), 22 states have call successors, (22), 9 states have call predecessors, (22), 13 states have return successors, (65), 25 states have call predecessors, (65), 21 states have call successors, (65) [2024-09-21 12:28:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 159 transitions. [2024-09-21 12:28:05,066 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 159 transitions. Word has length 55 [2024-09-21 12:28:05,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:28:05,066 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 159 transitions. [2024-09-21 12:28:05,067 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 8 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2024-09-21 12:28:05,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:28:05,067 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 159 transitions. [2024-09-21 12:28:05,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-21 12:28:05,069 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:28:05,069 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:28:05,089 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-21 12:28:05,269 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:28:05,270 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:28:05,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:28:05,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1987254780, now seen corresponding path program 2 times [2024-09-21 12:28:05,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:28:05,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483947410] [2024-09-21 12:28:05,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:28:05,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:28:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:05,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:28:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:05,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:28:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:05,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:05,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:05,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:05,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 12:28:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:05,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-21 12:28:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:05,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-21 12:28:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:05,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:05,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 12:28:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-21 12:28:05,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:28:05,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483947410] [2024-09-21 12:28:05,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483947410] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:28:05,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055683004] [2024-09-21 12:28:05,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:28:05,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:28:05,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:28:05,577 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:28:05,579 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 12:28:05,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:28:05,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:28:05,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-21 12:28:05,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:28:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-21 12:28:05,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:28:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-21 12:28:06,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055683004] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:28:06,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:28:06,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 9] total 22 [2024-09-21 12:28:06,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607347185] [2024-09-21 12:28:06,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:28:06,046 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-21 12:28:06,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:28:06,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-21 12:28:06,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-09-21 12:28:06,047 INFO L87 Difference]: Start difference. First operand 97 states and 159 transitions. Second operand has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 12 states have call successors, (21), 1 states have call predecessors, (21), 9 states have return successors, (23), 14 states have call predecessors, (23), 12 states have call successors, (23) [2024-09-21 12:28:06,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:28:06,453 INFO L93 Difference]: Finished difference Result 192 states and 339 transitions. [2024-09-21 12:28:06,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-21 12:28:06,454 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 12 states have call successors, (21), 1 states have call predecessors, (21), 9 states have return successors, (23), 14 states have call predecessors, (23), 12 states have call successors, (23) Word has length 69 [2024-09-21 12:28:06,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:28:06,456 INFO L225 Difference]: With dead ends: 192 [2024-09-21 12:28:06,456 INFO L226 Difference]: Without dead ends: 89 [2024-09-21 12:28:06,457 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 148 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2024-09-21 12:28:06,458 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 63 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:28:06,458 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 274 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:28:06,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-21 12:28:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2024-09-21 12:28:06,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 14 states have call successors, (14), 10 states have call predecessors, (14), 12 states have return successors, (32), 17 states have call predecessors, (32), 13 states have call successors, (32) [2024-09-21 12:28:06,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 107 transitions. [2024-09-21 12:28:06,478 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 107 transitions. Word has length 69 [2024-09-21 12:28:06,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:28:06,480 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 107 transitions. [2024-09-21 12:28:06,480 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 12 states have call successors, (21), 1 states have call predecessors, (21), 9 states have return successors, (23), 14 states have call predecessors, (23), 12 states have call successors, (23) [2024-09-21 12:28:06,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:28:06,480 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 107 transitions. [2024-09-21 12:28:06,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-21 12:28:06,481 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:28:06,481 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:28:06,502 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-21 12:28:06,682 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:28:06,683 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:28:06,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:28:06,683 INFO L85 PathProgramCache]: Analyzing trace with hash -2144655573, now seen corresponding path program 1 times [2024-09-21 12:28:06,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:28:06,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816903141] [2024-09-21 12:28:06,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:28:06,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:28:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:06,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:28:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:06,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:28:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:06,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:07,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:07,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:07,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 12:28:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:07,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-21 12:28:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:07,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-21 12:28:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:07,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:07,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 12:28:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-09-21 12:28:07,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:28:07,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816903141] [2024-09-21 12:28:07,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816903141] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:28:07,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369572459] [2024-09-21 12:28:07,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:28:07,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:28:07,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:28:07,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:28:07,167 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 12:28:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:07,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-21 12:28:07,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:28:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-09-21 12:28:07,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:28:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-09-21 12:28:07,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369572459] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:28:07,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:28:07,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 21 [2024-09-21 12:28:07,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803948021] [2024-09-21 12:28:07,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:28:07,546 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-21 12:28:07,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:28:07,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-21 12:28:07,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2024-09-21 12:28:07,547 INFO L87 Difference]: Start difference. First operand 80 states and 107 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (13), 13 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-21 12:28:07,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:28:07,659 INFO L93 Difference]: Finished difference Result 97 states and 131 transitions. [2024-09-21 12:28:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-21 12:28:07,659 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (13), 13 states have call predecessors, (13), 4 states have call successors, (13) Word has length 68 [2024-09-21 12:28:07,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:28:07,661 INFO L225 Difference]: With dead ends: 97 [2024-09-21 12:28:07,661 INFO L226 Difference]: Without dead ends: 93 [2024-09-21 12:28:07,661 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2024-09-21 12:28:07,662 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:28:07,662 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 587 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:28:07,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-21 12:28:07,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2024-09-21 12:28:07,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 16 states have call successors, (16), 10 states have call predecessors, (16), 14 states have return successors, (39), 21 states have call predecessors, (39), 15 states have call successors, (39) [2024-09-21 12:28:07,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 122 transitions. [2024-09-21 12:28:07,681 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 122 transitions. Word has length 68 [2024-09-21 12:28:07,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:28:07,681 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 122 transitions. [2024-09-21 12:28:07,682 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (13), 13 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-21 12:28:07,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:28:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 122 transitions. [2024-09-21 12:28:07,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-21 12:28:07,683 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:28:07,683 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:28:07,701 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-21 12:28:07,887 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:28:07,888 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:28:07,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:28:07,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2028010288, now seen corresponding path program 1 times [2024-09-21 12:28:07,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:28:07,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636250182] [2024-09-21 12:28:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:28:07,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:28:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:07,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:28:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:07,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:28:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:07,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:07,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:08,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:08,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 12:28:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:08,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-21 12:28:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:08,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-21 12:28:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:08,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-21 12:28:08,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:08,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 12:28:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-21 12:28:08,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:28:08,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636250182] [2024-09-21 12:28:08,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636250182] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:28:08,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981082901] [2024-09-21 12:28:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:28:08,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:28:08,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:28:08,068 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:28:08,070 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-21 12:28:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:28:08,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-21 12:28:08,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:28:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-21 12:28:08,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:28:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-21 12:28:08,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981082901] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:28:08,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:28:08,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2024-09-21 12:28:08,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532442203] [2024-09-21 12:28:08,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:28:08,721 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-21 12:28:08,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:28:08,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-21 12:28:08,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-09-21 12:28:08,723 INFO L87 Difference]: Start difference. First operand 90 states and 122 transitions. Second operand has 17 states, 16 states have (on average 3.8125) internal successors, (61), 17 states have internal predecessors, (61), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-21 12:28:08,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:28:08,927 INFO L93 Difference]: Finished difference Result 162 states and 237 transitions. [2024-09-21 12:28:08,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-21 12:28:08,927 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.8125) internal successors, (61), 17 states have internal predecessors, (61), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) Word has length 69 [2024-09-21 12:28:08,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:28:08,928 INFO L225 Difference]: With dead ends: 162 [2024-09-21 12:28:08,928 INFO L226 Difference]: Without dead ends: 0 [2024-09-21 12:28:08,930 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 150 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2024-09-21 12:28:08,930 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 19 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:28:08,931 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 224 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:28:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-21 12:28:08,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-21 12:28:08,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-21 12:28:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-21 12:28:08,932 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2024-09-21 12:28:08,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:28:08,932 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-21 12:28:08,933 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.8125) internal successors, (61), 17 states have internal predecessors, (61), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-21 12:28:08,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:28:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-21 12:28:08,933 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-21 12:28:08,936 INFO L785 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-21 12:28:08,955 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-21 12:28:09,140 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-21 12:28:09,144 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:28:09,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-21 12:28:11,567 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-21 12:28:11,594 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:28:11 BoogieIcfgContainer [2024-09-21 12:28:11,594 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-21 12:28:11,595 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-21 12:28:11,595 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-21 12:28:11,595 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-21 12:28:11,596 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:27:57" (3/4) ... [2024-09-21 12:28:11,598 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-21 12:28:11,657 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-21 12:28:11,658 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-21 12:28:11,658 INFO L158 Benchmark]: Toolchain (without parser) took 14870.82ms. Allocated memory was 184.5MB in the beginning and 323.0MB in the end (delta: 138.4MB). Free memory was 143.2MB in the beginning and 129.2MB in the end (delta: 14.0MB). Peak memory consumption was 151.1MB. Max. memory is 16.1GB. [2024-09-21 12:28:11,659 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 104.9MB. Free memory was 73.4MB in the beginning and 73.3MB in the end (delta: 118.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 12:28:11,659 INFO L158 Benchmark]: CACSL2BoogieTranslator took 252.70ms. Allocated memory is still 184.5MB. Free memory was 143.2MB in the beginning and 131.4MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-21 12:28:11,659 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.85ms. Allocated memory is still 184.5MB. Free memory was 131.4MB in the beginning and 130.7MB in the end (delta: 742.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-21 12:28:11,659 INFO L158 Benchmark]: Boogie Preprocessor took 48.22ms. Allocated memory is still 184.5MB. Free memory was 130.7MB in the beginning and 129.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 12:28:11,660 INFO L158 Benchmark]: RCFGBuilder took 430.50ms. Allocated memory is still 184.5MB. Free memory was 129.3MB in the beginning and 149.1MB in the end (delta: -19.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-21 12:28:11,660 INFO L158 Benchmark]: TraceAbstraction took 14047.22ms. Allocated memory was 184.5MB in the beginning and 323.0MB in the end (delta: 138.4MB). Free memory was 148.5MB in the beginning and 132.3MB in the end (delta: 16.1MB). Peak memory consumption was 158.0MB. Max. memory is 16.1GB. [2024-09-21 12:28:11,661 INFO L158 Benchmark]: Witness Printer took 63.22ms. Allocated memory is still 323.0MB. Free memory was 132.3MB in the beginning and 129.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-21 12:28:11,663 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 104.9MB. Free memory was 73.4MB in the beginning and 73.3MB in the end (delta: 118.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 252.70ms. Allocated memory is still 184.5MB. Free memory was 143.2MB in the beginning and 131.4MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.85ms. Allocated memory is still 184.5MB. Free memory was 131.4MB in the beginning and 130.7MB in the end (delta: 742.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.22ms. Allocated memory is still 184.5MB. Free memory was 130.7MB in the beginning and 129.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 430.50ms. Allocated memory is still 184.5MB. Free memory was 129.3MB in the beginning and 149.1MB in the end (delta: -19.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 14047.22ms. Allocated memory was 184.5MB in the beginning and 323.0MB in the end (delta: 138.4MB). Free memory was 148.5MB in the beginning and 132.3MB in the end (delta: 16.1MB). Peak memory consumption was 158.0MB. Max. memory is 16.1GB. * Witness Printer took 63.22ms. Allocated memory is still 323.0MB. Free memory was 132.3MB in the beginning and 129.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 41]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.5s, OverallIterations: 11, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 364 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 295 mSDsluCounter, 2557 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2223 mSDsCounter, 242 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2550 IncrementalHoareTripleChecker+Invalid, 2792 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 242 mSolverCounterUnsat, 334 mSDtfsCounter, 2550 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1186 GetRequests, 979 SyntacticMatches, 27 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=142occurred in iteration=7, InterpolantAutomatonStates: 143, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 90 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.9s InterpolantComputationTime, 921 NumberOfCodeBlocks, 921 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1339 ConstructedInterpolants, 0 QuantifiedInterpolants, 2751 SizeOfPredicates, 16 NumberOfNonLiveVariables, 1164 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 29 InterpolantComputations, 2 PerfectInterpolantSequences, 816/1143 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 19]: Procedure Contract for fibo2 Derived contract for procedure fibo2. Ensures: (((((\result == 1) && (n == 1)) || (\result == 0)) || (1 < n)) && (((((\result == 1) && (n == 1)) || (n < 1)) || (3 < n)) || ((\result == 1) && (2 == n)))) - ProcedureContractResult [Line: 9]: Procedure Contract for fibo1 Derived contract for procedure fibo1. Ensures: (((((\result == 1) || (n < 1)) || (2 < n)) && (((\result == 0) || (1 < n)) || (n == 1))) && ((((3 == n) || (4 < n)) || (n < 2)) || ((3 == \result) && (n == 4)))) RESULT: Ultimate proved your program to be correct! [2024-09-21 12:28:11,704 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE