./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/ps5-ll.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 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/nla-digbench/ps5-ll.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 1d0411df2a3b388d2db53c57aaa1f7219c19c9d74992ef1ed00eab4b9b56cbed --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 19:42:43,562 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 19:42:43,627 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 19:42:43,633 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 19:42:43,633 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 19:42:43,651 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 19:42:43,652 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 19:42:43,653 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 19:42:43,653 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 19:42:43,656 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 19:42:43,656 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 19:42:43,656 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 19:42:43,657 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 19:42:43,657 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 19:42:43,657 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 19:42:43,658 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 19:42:43,658 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 19:42:43,658 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 19:42:43,658 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 19:42:43,658 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 19:42:43,659 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 19:42:43,659 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 19:42:43,659 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 19:42:43,659 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 19:42:43,659 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 19:42:43,660 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 19:42:43,660 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 19:42:43,660 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 19:42:43,660 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 19:42:43,660 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 19:42:43,660 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 19:42:43,661 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 19:42:43,661 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:42:43,661 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 19:42:43,661 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 19:42:43,661 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 19:42:43,662 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 19:42:43,662 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 19:42:43,662 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 19:42:43,662 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 19:42:43,662 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 19:42:43,663 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 19:42:43,663 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d0411df2a3b388d2db53c57aaa1f7219c19c9d74992ef1ed00eab4b9b56cbed Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 19:42:43,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 19:42:43,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 19:42:43,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 19:42:43,873 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 19:42:43,873 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 19:42:43,874 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/ps5-ll.c [2024-09-11 19:42:45,025 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 19:42:45,185 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 19:42:45,186 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/ps5-ll.c [2024-09-11 19:42:45,195 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/149f23267/3c17c03660d1435aabc6615f203de8a5/FLAG60c8acda5 [2024-09-11 19:42:45,204 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/149f23267/3c17c03660d1435aabc6615f203de8a5 [2024-09-11 19:42:45,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 19:42:45,207 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 19:42:45,208 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 19:42:45,208 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 19:42:45,212 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 19:42:45,212 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:42:45" (1/1) ... [2024-09-11 19:42:45,213 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c8d3b0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:42:45, skipping insertion in model container [2024-09-11 19:42:45,213 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:42:45" (1/1) ... [2024-09-11 19:42:45,240 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 19:42:45,358 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/ps5-ll.c[458,471] [2024-09-11 19:42:45,375 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:42:45,383 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 19:42:45,391 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/ps5-ll.c[458,471] [2024-09-11 19:42:45,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:42:45,408 INFO L204 MainTranslator]: Completed translation [2024-09-11 19:42:45,408 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:42:45 WrapperNode [2024-09-11 19:42:45,409 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 19:42:45,410 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 19:42:45,410 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 19:42:45,410 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 19:42:45,419 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:42:45" (1/1) ... [2024-09-11 19:42:45,425 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:42:45" (1/1) ... [2024-09-11 19:42:45,436 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2024-09-11 19:42:45,437 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 19:42:45,437 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 19:42:45,437 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 19:42:45,438 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 19:42:45,444 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:42:45" (1/1) ... [2024-09-11 19:42:45,445 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:42:45" (1/1) ... [2024-09-11 19:42:45,445 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:42:45" (1/1) ... [2024-09-11 19:42:45,453 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]. [2024-09-11 19:42:45,453 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:42:45" (1/1) ... [2024-09-11 19:42:45,453 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:42:45" (1/1) ... [2024-09-11 19:42:45,455 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:42:45" (1/1) ... [2024-09-11 19:42:45,457 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:42:45" (1/1) ... [2024-09-11 19:42:45,458 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:42:45" (1/1) ... [2024-09-11 19:42:45,458 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:42:45" (1/1) ... [2024-09-11 19:42:45,459 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 19:42:45,460 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 19:42:45,460 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 19:42:45,460 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 19:42:45,460 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:42:45" (1/1) ... [2024-09-11 19:42:45,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:42:45,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:42:45,489 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) [2024-09-11 19:42:45,495 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 [2024-09-11 19:42:45,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 19:42:45,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 19:42:45,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 19:42:45,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 19:42:45,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 19:42:45,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 19:42:45,582 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 19:42:45,584 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 19:42:45,683 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-11 19:42:45,683 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 19:42:45,707 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 19:42:45,707 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-11 19:42:45,708 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:42:45 BoogieIcfgContainer [2024-09-11 19:42:45,708 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 19:42:45,710 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 19:42:45,710 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 19:42:45,713 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 19:42:45,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 07:42:45" (1/3) ... [2024-09-11 19:42:45,714 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e78d030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:42:45, skipping insertion in model container [2024-09-11 19:42:45,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:42:45" (2/3) ... [2024-09-11 19:42:45,715 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e78d030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:42:45, skipping insertion in model container [2024-09-11 19:42:45,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:42:45" (3/3) ... [2024-09-11 19:42:45,716 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll.c [2024-09-11 19:42:45,729 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 19:42:45,730 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 19:42:45,783 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 19:42:45,789 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;@1d9ab230, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 19:42:45,790 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 19:42:45,793 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-11 19:42:45,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-11 19:42:45,798 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:42:45,798 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:42:45,799 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:42:45,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:45,803 INFO L85 PathProgramCache]: Analyzing trace with hash -959206418, now seen corresponding path program 1 times [2024-09-11 19:42:45,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:42:45,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228566568] [2024-09-11 19:42:45,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:45,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:42:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:42:45,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:42:45,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228566568] [2024-09-11 19:42:45,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228566568] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:42:45,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:42:45,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 19:42:45,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516929182] [2024-09-11 19:42:45,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:42:45,915 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 19:42:45,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:42:45,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 19:42:45,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:42:45,932 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:42:45,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:42:45,948 INFO L93 Difference]: Finished difference Result 30 states and 44 transitions. [2024-09-11 19:42:45,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 19:42:45,950 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-09-11 19:42:45,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:42:45,955 INFO L225 Difference]: With dead ends: 30 [2024-09-11 19:42:45,955 INFO L226 Difference]: Without dead ends: 14 [2024-09-11 19:42:45,957 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:42:45,960 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:42:45,960 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:42:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-11 19:42:45,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-11 19:42:45,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 19:42:45,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-09-11 19:42:45,983 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2024-09-11 19:42:45,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:42:45,983 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-09-11 19:42:45,984 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:42:45,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:45,984 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-09-11 19:42:45,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-09-11 19:42:45,985 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:42:45,985 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:42:45,985 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 19:42:45,985 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:42:45,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:45,986 INFO L85 PathProgramCache]: Analyzing trace with hash 817588404, now seen corresponding path program 1 times [2024-09-11 19:42:45,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:42:45,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859656700] [2024-09-11 19:42:45,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:45,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:42:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:42:46,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666075563] [2024-09-11 19:42:46,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:46,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:46,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:42:46,006 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) [2024-09-11 19:42:46,007 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 19:42:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:46,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:42:46,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:42:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:42:46,131 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:42:46,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:42:46,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859656700] [2024-09-11 19:42:46,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:42:46,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666075563] [2024-09-11 19:42:46,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666075563] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:42:46,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:42:46,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:42:46,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208537386] [2024-09-11 19:42:46,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:42:46,134 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:42:46,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:42:46,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:42:46,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:42:46,135 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:42:46,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:42:46,182 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2024-09-11 19:42:46,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:42:46,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-09-11 19:42:46,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:42:46,184 INFO L225 Difference]: With dead ends: 25 [2024-09-11 19:42:46,184 INFO L226 Difference]: Without dead ends: 21 [2024-09-11 19:42:46,184 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:42:46,185 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:42:46,185 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 38 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:42:46,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-11 19:42:46,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-11 19:42:46,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-11 19:42:46,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-09-11 19:42:46,197 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 8 [2024-09-11 19:42:46,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:42:46,197 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-09-11 19:42:46,197 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 19:42:46,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:46,198 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-09-11 19:42:46,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-11 19:42:46,198 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:42:46,199 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:42:46,212 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-11 19:42:46,399 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:46,400 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:42:46,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:46,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1282095925, now seen corresponding path program 1 times [2024-09-11 19:42:46,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:42:46,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430465892] [2024-09-11 19:42:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:46,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:42:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:42:46,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621335869] [2024-09-11 19:42:46,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:46,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:46,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:42:46,436 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) [2024-09-11 19:42:46,438 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 19:42:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:46,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-11 19:42:46,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:42:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 19:42:46,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:42:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 19:42:46,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:42:46,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430465892] [2024-09-11 19:42:46,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:42:46,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621335869] [2024-09-11 19:42:46,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621335869] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-11 19:42:46,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:42:46,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-11 19:42:46,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378416116] [2024-09-11 19:42:46,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:42:46,683 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:42:46,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:42:46,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:42:46,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:42:46,686 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 19:42:46,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:42:46,729 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2024-09-11 19:42:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:42:46,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-11 19:42:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:42:46,731 INFO L225 Difference]: With dead ends: 27 [2024-09-11 19:42:46,731 INFO L226 Difference]: Without dead ends: 23 [2024-09-11 19:42:46,732 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:42:46,733 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:42:46,734 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:42:46,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-11 19:42:46,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-11 19:42:46,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-11 19:42:46,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2024-09-11 19:42:46,743 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 15 [2024-09-11 19:42:46,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:42:46,744 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2024-09-11 19:42:46,744 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 19:42:46,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:46,745 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2024-09-11 19:42:46,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-11 19:42:46,745 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:42:46,746 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:42:46,758 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-11 19:42:46,949 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:46,950 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:42:46,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:46,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1293644165, now seen corresponding path program 1 times [2024-09-11 19:42:46,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:42:46,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825637332] [2024-09-11 19:42:46,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:46,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:42:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:42:46,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570858195] [2024-09-11 19:42:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:46,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:46,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:42:46,981 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) [2024-09-11 19:42:46,982 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 19:42:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:42:47,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-11 19:42:47,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:42:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 19:42:47,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:42:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 19:42:47,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:42:47,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825637332] [2024-09-11 19:42:47,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:42:47,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570858195] [2024-09-11 19:42:47,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570858195] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:42:47,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:42:47,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-11 19:42:47,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015884414] [2024-09-11 19:42:47,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:42:47,183 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-11 19:42:47,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:42:47,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-11 19:42:47,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:42:47,184 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 19:42:47,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:42:47,271 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2024-09-11 19:42:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 19:42:47,271 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 26 [2024-09-11 19:42:47,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:42:47,272 INFO L225 Difference]: With dead ends: 40 [2024-09-11 19:42:47,272 INFO L226 Difference]: Without dead ends: 32 [2024-09-11 19:42:47,272 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:42:47,273 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:42:47,273 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 68 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:42:47,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-11 19:42:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-11 19:42:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 19:42:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-11 19:42:47,285 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 26 [2024-09-11 19:42:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:42:47,286 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-11 19:42:47,286 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 19:42:47,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-11 19:42:47,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-11 19:42:47,287 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:42:47,287 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:42:47,299 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-11 19:42:47,491 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:47,492 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:42:47,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:47,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1936035506, now seen corresponding path program 2 times [2024-09-11 19:42:47,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:42:47,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323375090] [2024-09-11 19:42:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:47,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:42:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:42:47,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931420425] [2024-09-11 19:42:47,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:42:47,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:47,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:42:47,561 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) [2024-09-11 19:42:47,562 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 19:42:47,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:42:47,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:42:47,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-11 19:42:47,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:42:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-11 19:42:47,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:42:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-11 19:42:48,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:42:48,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323375090] [2024-09-11 19:42:48,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:42:48,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931420425] [2024-09-11 19:42:48,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931420425] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:42:48,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:42:48,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-09-11 19:42:48,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816884190] [2024-09-11 19:42:48,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:42:48,071 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-11 19:42:48,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:42:48,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-11 19:42:48,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-09-11 19:42:48,073 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-11 19:42:48,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:42:48,432 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2024-09-11 19:42:48,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-11 19:42:48,433 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 47 [2024-09-11 19:42:48,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:42:48,434 INFO L225 Difference]: With dead ends: 55 [2024-09-11 19:42:48,434 INFO L226 Difference]: Without dead ends: 47 [2024-09-11 19:42:48,434 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2024-09-11 19:42:48,435 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:42:48,435 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 249 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:42:48,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-11 19:42:48,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-11 19:42:48,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-11 19:42:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2024-09-11 19:42:48,455 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 47 [2024-09-11 19:42:48,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:42:48,455 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2024-09-11 19:42:48,455 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-11 19:42:48,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:48,456 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2024-09-11 19:42:48,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-11 19:42:48,457 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:42:48,458 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:42:48,472 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-11 19:42:48,661 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:48,662 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:42:48,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:48,662 INFO L85 PathProgramCache]: Analyzing trace with hash -118276357, now seen corresponding path program 3 times [2024-09-11 19:42:48,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:42:48,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623459222] [2024-09-11 19:42:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:48,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:42:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:42:48,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790973446] [2024-09-11 19:42:48,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:42:48,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:48,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:42:48,779 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) [2024-09-11 19:42:48,780 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 19:42:48,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-11 19:42:48,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:42:48,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-11 19:42:48,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:42:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 22 proven. 135 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-11 19:42:49,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:42:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 22 proven. 135 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-11 19:42:49,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:42:49,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623459222] [2024-09-11 19:42:49,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:42:49,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790973446] [2024-09-11 19:42:49,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790973446] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:42:49,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:42:49,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2024-09-11 19:42:49,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986707905] [2024-09-11 19:42:49,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:42:49,627 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-11 19:42:49,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:42:49,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-11 19:42:49,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2024-09-11 19:42:49,630 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 22 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-11 19:42:50,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:42:50,753 INFO L93 Difference]: Finished difference Result 85 states and 115 transitions. [2024-09-11 19:42:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-11 19:42:50,753 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 22 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 82 [2024-09-11 19:42:50,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:42:50,754 INFO L225 Difference]: With dead ends: 85 [2024-09-11 19:42:50,754 INFO L226 Difference]: Without dead ends: 77 [2024-09-11 19:42:50,755 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=497, Invalid=1953, Unknown=0, NotChecked=0, Total=2450 [2024-09-11 19:42:50,756 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 32 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:42:50,756 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 460 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 19:42:50,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-11 19:42:50,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-11 19:42:50,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 22 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-11 19:42:50,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 96 transitions. [2024-09-11 19:42:50,790 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 96 transitions. Word has length 82 [2024-09-11 19:42:50,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:42:50,791 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 96 transitions. [2024-09-11 19:42:50,791 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 22 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-11 19:42:50,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:50,791 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 96 transitions. [2024-09-11 19:42:50,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-09-11 19:42:50,795 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:42:50,795 INFO L216 NwaCegarLoop]: trace histogram [22, 21, 21, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:42:50,807 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-11 19:42:50,995 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-11 19:42:50,996 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:42:50,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:50,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1334734747, now seen corresponding path program 4 times [2024-09-11 19:42:50,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:42:50,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150554626] [2024-09-11 19:42:50,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:42:50,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:42:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:42:51,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873337231] [2024-09-11 19:42:51,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:42:51,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:51,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:42:51,249 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) [2024-09-11 19:42:51,250 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 19:42:51,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:42:51,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:42:51,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-11 19:42:51,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:42:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 42 proven. 570 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-09-11 19:42:51,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:42:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 42 proven. 570 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-09-11 19:42:52,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:42:52,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150554626] [2024-09-11 19:42:52,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:42:52,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873337231] [2024-09-11 19:42:52,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873337231] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:42:52,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:42:52,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2024-09-11 19:42:52,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618767501] [2024-09-11 19:42:52,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:42:52,870 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-11 19:42:52,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:42:52,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-11 19:42:52,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1614, Unknown=0, NotChecked=0, Total=2070 [2024-09-11 19:42:52,872 INFO L87 Difference]: Start difference. First operand 77 states and 96 transitions. Second operand has 46 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 45 states have internal predecessors, (90), 42 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2024-09-11 19:42:53,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:42:53,851 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2024-09-11 19:42:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-11 19:42:53,851 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 45 states have internal predecessors, (90), 42 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Word has length 152 [2024-09-11 19:42:53,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:42:53,852 INFO L225 Difference]: With dead ends: 82 [2024-09-11 19:42:53,852 INFO L226 Difference]: Without dead ends: 0 [2024-09-11 19:42:53,854 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 256 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=939, Invalid=3483, Unknown=0, NotChecked=0, Total=4422 [2024-09-11 19:42:53,854 INFO L434 NwaCegarLoop]: 68 mSDtfsCounter, 1 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:42:53,854 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1203 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 19:42:53,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-11 19:42:53,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-11 19:42:53,855 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) [2024-09-11 19:42:53,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-11 19:42:53,855 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 152 [2024-09-11 19:42:53,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:42:53,855 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-11 19:42:53,855 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 45 states have internal predecessors, (90), 42 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2024-09-11 19:42:53,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:42:53,855 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-11 19:42:53,855 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-11 19:42:53,857 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-11 19:42:53,870 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-11 19:42:54,058 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:42:54,061 INFO L408 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2024-09-11 19:42:54,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-11 19:42:54,698 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-11 19:42:54,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 07:42:54 BoogieIcfgContainer [2024-09-11 19:42:54,715 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-11 19:42:54,716 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-11 19:42:54,716 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-11 19:42:54,716 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-11 19:42:54,717 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:42:45" (3/4) ... [2024-09-11 19:42:54,718 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-11 19:42:54,722 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-11 19:42:54,724 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-09-11 19:42:54,724 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-09-11 19:42:54,724 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-11 19:42:54,724 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-11 19:42:54,788 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-11 19:42:54,789 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-11 19:42:54,789 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-11 19:42:54,789 INFO L158 Benchmark]: Toolchain (without parser) took 9582.17ms. Allocated memory was 199.2MB in the beginning and 251.7MB in the end (delta: 52.4MB). Free memory was 167.9MB in the beginning and 127.8MB in the end (delta: 40.1MB). Peak memory consumption was 92.5MB. Max. memory is 16.1GB. [2024-09-11 19:42:54,789 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 125.8MB. Free memory was 87.2MB in the beginning and 87.1MB in the end (delta: 118.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-11 19:42:54,790 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.00ms. Allocated memory is still 199.2MB. Free memory was 167.7MB in the beginning and 159.6MB in the end (delta: 8.1MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2024-09-11 19:42:54,790 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.35ms. Allocated memory is still 199.2MB. Free memory was 159.6MB in the beginning and 158.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-11 19:42:54,790 INFO L158 Benchmark]: Boogie Preprocessor took 21.87ms. Allocated memory is still 199.2MB. Free memory was 158.3MB in the beginning and 156.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-11 19:42:54,790 INFO L158 Benchmark]: RCFGBuilder took 248.13ms. Allocated memory is still 199.2MB. Free memory was 156.7MB in the beginning and 144.9MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-11 19:42:54,790 INFO L158 Benchmark]: TraceAbstraction took 9004.86ms. Allocated memory was 199.2MB in the beginning and 251.7MB in the end (delta: 52.4MB). Free memory was 144.1MB in the beginning and 132.0MB in the end (delta: 12.1MB). Peak memory consumption was 125.9MB. Max. memory is 16.1GB. [2024-09-11 19:42:54,791 INFO L158 Benchmark]: Witness Printer took 73.20ms. Allocated memory is still 251.7MB. Free memory was 132.0MB in the beginning and 127.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-11 19:42:54,792 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 125.8MB. Free memory was 87.2MB in the beginning and 87.1MB in the end (delta: 118.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 201.00ms. Allocated memory is still 199.2MB. Free memory was 167.7MB in the beginning and 159.6MB in the end (delta: 8.1MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.35ms. Allocated memory is still 199.2MB. Free memory was 159.6MB in the beginning and 158.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.87ms. Allocated memory is still 199.2MB. Free memory was 158.3MB in the beginning and 156.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 248.13ms. Allocated memory is still 199.2MB. Free memory was 156.7MB in the beginning and 144.9MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 9004.86ms. Allocated memory was 199.2MB in the beginning and 251.7MB in the end (delta: 52.4MB). Free memory was 144.1MB in the beginning and 132.0MB in the end (delta: 12.1MB). Peak memory consumption was 125.9MB. Max. memory is 16.1GB. * Witness Printer took 73.20ms. Allocated memory is still 251.7MB. Free memory was 132.0MB in the beginning and 127.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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: 12]: 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 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.3s, OverallIterations: 7, TraceHistogramMax: 22, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 66 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 59 mSDsluCounter, 2068 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1885 mSDsCounter, 27 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1686 IncrementalHoareTripleChecker+Invalid, 1713 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 27 mSolverCounterUnsat, 183 mSDtfsCounter, 1686 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 699 GetRequests, 531 SyntacticMatches, 6 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=6, InterpolantAutomatonStates: 93, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 668 NumberOfCodeBlocks, 646 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 648 ConstructedInterpolants, 0 QuantifiedInterpolants, 3620 SizeOfPredicates, 9 NumberOfNonLiveVariables, 799 ConjunctsInSsa, 196 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 2434/3912 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 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((y + ((__int128) y * y)) == (c + ((__int128) c * y))) && ((((__int128) 5 * c) + ((__int128) c * y)) == (((__int128) 5 * y) + ((__int128) y * y)))) && ((((__int128) k * y) == ((__int128) y * y)) || (c < k))) && (k <= 256)) && ((((__int128) 30 * x) + y) == (((6 * (((((__int128) y * y) * y) * y) * y)) + ((((__int128) y * y) * y) * 10)) + (((((__int128) y * y) * y) * y) * 15)))) - InvariantResult [Line: 39]: Location Invariant Derived location invariant: 1 - ProcedureContractResult [Line: 9]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-11 19:42:54,810 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