./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd3-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/egcd3-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 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 11:40:26,165 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 11:40:26,223 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 11:40:26,228 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 11:40:26,230 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 11:40:26,254 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 11:40:26,256 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 11:40:26,256 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 11:40:26,256 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 11:40:26,258 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 11:40:26,258 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 11:40:26,259 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 11:40:26,259 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 11:40:26,259 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 11:40:26,260 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 11:40:26,261 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 11:40:26,262 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 11:40:26,262 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 11:40:26,262 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 11:40:26,262 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 11:40:26,263 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 11:40:26,263 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 11:40:26,263 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 11:40:26,264 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 11:40:26,267 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 11:40:26,267 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 11:40:26,267 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 11:40:26,267 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 11:40:26,268 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 11:40:26,268 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 11:40:26,268 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 11:40:26,268 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 11:40:26,268 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:40:26,268 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 11:40:26,269 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 11:40:26,269 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 11:40:26,269 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 11:40:26,269 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 11:40:26,269 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 11:40:26,269 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 11:40:26,269 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 11:40:26,270 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 11:40:26,270 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 11:40:26,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 11:40:26,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 11:40:26,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 11:40:26,487 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 11:40:26,488 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 11:40:26,489 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2024-09-21 11:40:27,793 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 11:40:27,948 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 11:40:27,950 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2024-09-21 11:40:27,960 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/a339143d2/94153156872e43ae95615a4e55a57db6/FLAGbd8d9b02e [2024-09-21 11:40:27,973 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/a339143d2/94153156872e43ae95615a4e55a57db6 [2024-09-21 11:40:27,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 11:40:27,978 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 11:40:27,979 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 11:40:27,979 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 11:40:27,983 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 11:40:27,984 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:40:27" (1/1) ... [2024-09-21 11:40:27,984 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2faa4ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:40:27, skipping insertion in model container [2024-09-21 11:40:27,985 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:40:27" (1/1) ... [2024-09-21 11:40:28,000 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 11:40:28,124 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2024-09-21 11:40:28,142 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:40:28,152 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 11:40:28,163 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2024-09-21 11:40:28,172 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:40:28,188 INFO L204 MainTranslator]: Completed translation [2024-09-21 11:40:28,188 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:40:28 WrapperNode [2024-09-21 11:40:28,188 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 11:40:28,190 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 11:40:28,190 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 11:40:28,190 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 11:40:28,195 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:40:28" (1/1) ... [2024-09-21 11:40:28,200 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:40:28" (1/1) ... [2024-09-21 11:40:28,204 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 11:40:28,205 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 11:40:28,205 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 11:40:28,205 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 11:40:28,206 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 11:40:28,214 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:40:28" (1/1) ... [2024-09-21 11:40:28,214 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:40:28" (1/1) ... [2024-09-21 11:40:28,215 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:40:28" (1/1) ... [2024-09-21 11:40:28,234 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-21 11:40:28,235 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:40:28" (1/1) ... [2024-09-21 11:40:28,235 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:40:28" (1/1) ... [2024-09-21 11:40:28,237 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:40:28" (1/1) ... [2024-09-21 11:40:28,240 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:40:28" (1/1) ... [2024-09-21 11:40:28,240 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:40:28" (1/1) ... [2024-09-21 11:40:28,241 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:40:28" (1/1) ... [2024-09-21 11:40:28,242 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 11:40:28,243 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 11:40:28,243 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 11:40:28,243 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 11:40:28,244 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:40:28" (1/1) ... [2024-09-21 11:40:28,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:40:28,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:40:28,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-21 11:40:28,279 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-21 11:40:28,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 11:40:28,314 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-21 11:40:28,314 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-21 11:40:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 11:40:28,315 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 11:40:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 11:40:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 11:40:28,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 11:40:28,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 11:40:28,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 11:40:28,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 11:40:28,317 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 11:40:28,423 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 11:40:28,424 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 11:40:28,548 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-21 11:40:28,548 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 11:40:28,562 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 11:40:28,563 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-21 11:40:28,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:40:28 BoogieIcfgContainer [2024-09-21 11:40:28,563 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 11:40:28,565 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 11:40:28,565 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 11:40:28,568 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 11:40:28,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:40:27" (1/3) ... [2024-09-21 11:40:28,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a3501f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:40:28, skipping insertion in model container [2024-09-21 11:40:28,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:40:28" (2/3) ... [2024-09-21 11:40:28,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a3501f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:40:28, skipping insertion in model container [2024-09-21 11:40:28,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:40:28" (3/3) ... [2024-09-21 11:40:28,570 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2024-09-21 11:40:28,582 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 11:40:28,582 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 11:40:28,632 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 11:40:28,638 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;@22fb1e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 11:40:28,639 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 11:40:28,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-21 11:40:28,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-21 11:40:28,650 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:40:28,651 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:40:28,652 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:40:28,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:28,656 INFO L85 PathProgramCache]: Analyzing trace with hash 48210315, now seen corresponding path program 1 times [2024-09-21 11:40:28,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:40:28,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032278479] [2024-09-21 11:40:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:28,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:40:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:28,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:40:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:28,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:40:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:28,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 11:40:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 11:40:28,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:40:28,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032278479] [2024-09-21 11:40:28,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032278479] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:40:28,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:40:28,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-21 11:40:28,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371250550] [2024-09-21 11:40:28,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:40:28,793 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-21 11:40:28,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:40:28,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-21 11:40:28,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 11:40:28,809 INFO L87 Difference]: Start difference. First operand has 35 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-21 11:40:28,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:40:28,830 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2024-09-21 11:40:28,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-21 11:40:28,831 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-21 11:40:28,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:40:28,837 INFO L225 Difference]: With dead ends: 64 [2024-09-21 11:40:28,837 INFO L226 Difference]: Without dead ends: 31 [2024-09-21 11:40:28,840 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 11:40:28,843 INFO L434 NwaCegarLoop]: 40 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, 40 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 [2024-09-21 11:40:28,845 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:40:28,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-21 11:40:28,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-21 11:40:28,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-21 11:40:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2024-09-21 11:40:28,870 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 21 [2024-09-21 11:40:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:40:28,870 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2024-09-21 11:40:28,871 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-21 11:40:28,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:28,871 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2024-09-21 11:40:28,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-21 11:40:28,872 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:40:28,872 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:40:28,872 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 11:40:28,873 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:40:28,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:28,873 INFO L85 PathProgramCache]: Analyzing trace with hash -190498723, now seen corresponding path program 1 times [2024-09-21 11:40:28,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:40:28,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286925024] [2024-09-21 11:40:28,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:28,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:40:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:28,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:40:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:29,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:40:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:29,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 11:40:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 11:40:29,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:40:29,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286925024] [2024-09-21 11:40:29,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286925024] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:40:29,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:40:29,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-21 11:40:29,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234181969] [2024-09-21 11:40:29,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:40:29,050 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-21 11:40:29,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:40:29,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-21 11:40:29,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-21 11:40:29,051 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-21 11:40:29,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:40:29,155 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2024-09-21 11:40:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-21 11:40:29,158 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2024-09-21 11:40:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:40:29,161 INFO L225 Difference]: With dead ends: 50 [2024-09-21 11:40:29,161 INFO L226 Difference]: Without dead ends: 43 [2024-09-21 11:40:29,161 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-21 11:40:29,162 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:40:29,162 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 124 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:40:29,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-21 11:40:29,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2024-09-21 11:40:29,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-21 11:40:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-09-21 11:40:29,173 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2024-09-21 11:40:29,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:40:29,174 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-09-21 11:40:29,174 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-21 11:40:29,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:29,174 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-09-21 11:40:29,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-21 11:40:29,175 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:40:29,175 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:40:29,176 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-21 11:40:29,176 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:40:29,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:29,176 INFO L85 PathProgramCache]: Analyzing trace with hash -832406041, now seen corresponding path program 1 times [2024-09-21 11:40:29,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:40:29,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164791780] [2024-09-21 11:40:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:29,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:40:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:40:29,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262686542] [2024-09-21 11:40:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:29,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:29,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:40:29,194 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:40:29,195 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 11:40:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:29,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-21 11:40:29,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:40:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 11:40:29,347 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:40:29,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:40:29,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164791780] [2024-09-21 11:40:29,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:40:29,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262686542] [2024-09-21 11:40:29,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262686542] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:40:29,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:40:29,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:40:29,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874567159] [2024-09-21 11:40:29,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:40:29,349 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:40:29,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:40:29,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:40:29,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:40:29,352 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-21 11:40:29,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:40:29,394 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2024-09-21 11:40:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:40:29,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-09-21 11:40:29,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:40:29,396 INFO L225 Difference]: With dead ends: 49 [2024-09-21 11:40:29,396 INFO L226 Difference]: Without dead ends: 47 [2024-09-21 11:40:29,397 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-21 11:40:29,399 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:40:29,400 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:40:29,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-21 11:40:29,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-21 11:40:29,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-21 11:40:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-09-21 11:40:29,412 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 25 [2024-09-21 11:40:29,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:40:29,412 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-09-21 11:40:29,412 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-21 11:40:29,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:29,413 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-09-21 11:40:29,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-21 11:40:29,413 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:40:29,414 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:40:29,431 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 11:40:29,614 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:29,614 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:40:29,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:29,615 INFO L85 PathProgramCache]: Analyzing trace with hash -143490539, now seen corresponding path program 1 times [2024-09-21 11:40:29,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:40:29,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975213136] [2024-09-21 11:40:29,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:29,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:40:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:29,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:40:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:29,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:40:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:29,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 11:40:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 11:40:29,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:40:29,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975213136] [2024-09-21 11:40:29,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975213136] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:40:29,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367468097] [2024-09-21 11:40:29,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:29,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:29,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:40:29,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:40:29,760 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 11:40:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:29,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-21 11:40:29,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:40:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 11:40:29,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:40:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 11:40:29,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367468097] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:40:29,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:40:29,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-21 11:40:29,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559911285] [2024-09-21 11:40:29,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:40:29,950 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-21 11:40:29,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:40:29,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-21 11:40:29,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-21 11:40:29,950 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-21 11:40:30,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:40:30,094 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2024-09-21 11:40:30,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 11:40:30,095 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-09-21 11:40:30,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:40:30,096 INFO L225 Difference]: With dead ends: 99 [2024-09-21 11:40:30,096 INFO L226 Difference]: Without dead ends: 92 [2024-09-21 11:40:30,096 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-21 11:40:30,097 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 60 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:40:30,097 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 267 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:40:30,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-21 11:40:30,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2024-09-21 11:40:30,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-21 11:40:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2024-09-21 11:40:30,122 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 27 [2024-09-21 11:40:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:40:30,122 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2024-09-21 11:40:30,122 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-21 11:40:30,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2024-09-21 11:40:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-21 11:40:30,124 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:40:30,125 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:40:30,143 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 11:40:30,325 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:30,326 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:40:30,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:30,327 INFO L85 PathProgramCache]: Analyzing trace with hash -849404633, now seen corresponding path program 1 times [2024-09-21 11:40:30,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:40:30,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997848978] [2024-09-21 11:40:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:30,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:40:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:40:30,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359124170] [2024-09-21 11:40:30,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:30,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:30,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:40:30,343 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:40:30,348 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 11:40:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:30,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-21 11:40:30,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:40:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 11:40:30,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:40:30,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:40:30,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997848978] [2024-09-21 11:40:30,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:40:30,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359124170] [2024-09-21 11:40:30,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359124170] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:40:30,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:40:30,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:40:30,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72053760] [2024-09-21 11:40:30,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:40:30,474 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:40:30,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:40:30,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:40:30,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:40:30,475 INFO L87 Difference]: Start difference. First operand 67 states and 89 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 11:40:30,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:40:30,524 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2024-09-21 11:40:30,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:40:30,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-09-21 11:40:30,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:40:30,525 INFO L225 Difference]: With dead ends: 75 [2024-09-21 11:40:30,525 INFO L226 Difference]: Without dead ends: 73 [2024-09-21 11:40:30,526 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-21 11:40:30,526 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:40:30,526 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:40:30,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-21 11:40:30,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2024-09-21 11:40:30,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-21 11:40:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2024-09-21 11:40:30,548 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 30 [2024-09-21 11:40:30,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:40:30,548 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2024-09-21 11:40:30,548 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 11:40:30,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:30,549 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2024-09-21 11:40:30,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-21 11:40:30,549 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:40:30,550 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:40:30,565 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-21 11:40:30,750 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:30,751 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:40:30,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:30,751 INFO L85 PathProgramCache]: Analyzing trace with hash -570934993, now seen corresponding path program 1 times [2024-09-21 11:40:30,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:40:30,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021138316] [2024-09-21 11:40:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:30,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:40:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:40:30,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676992526] [2024-09-21 11:40:30,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:30,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:30,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:40:30,765 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:40:30,766 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 11:40:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:30,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-21 11:40:30,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:40:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 11:40:30,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:40:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 11:40:30,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:40:30,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021138316] [2024-09-21 11:40:30,964 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:40:30,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676992526] [2024-09-21 11:40:30,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676992526] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:40:30,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:40:30,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2024-09-21 11:40:30,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313780190] [2024-09-21 11:40:30,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:40:30,965 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-21 11:40:30,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:40:30,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-21 11:40:30,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-09-21 11:40:30,966 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-21 11:40:31,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:40:31,085 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2024-09-21 11:40:31,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-21 11:40:31,085 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2024-09-21 11:40:31,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:40:31,086 INFO L225 Difference]: With dead ends: 107 [2024-09-21 11:40:31,086 INFO L226 Difference]: Without dead ends: 105 [2024-09-21 11:40:31,087 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-09-21 11:40:31,087 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 20 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:40:31,087 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 243 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:40:31,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-09-21 11:40:31,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2024-09-21 11:40:31,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-21 11:40:31,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2024-09-21 11:40:31,104 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 30 [2024-09-21 11:40:31,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:40:31,104 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2024-09-21 11:40:31,104 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-21 11:40:31,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:31,104 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2024-09-21 11:40:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-21 11:40:31,105 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:40:31,105 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:40:31,117 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 11:40:31,306 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:31,306 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:40:31,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:31,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1950278233, now seen corresponding path program 1 times [2024-09-21 11:40:31,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:40:31,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528951354] [2024-09-21 11:40:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:31,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:40:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:40:31,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065210899] [2024-09-21 11:40:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:31,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:31,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:40:31,321 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:40:31,326 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 11:40:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:31,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-21 11:40:31,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:40:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-21 11:40:31,404 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:40:31,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:40:31,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528951354] [2024-09-21 11:40:31,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:40:31,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065210899] [2024-09-21 11:40:31,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065210899] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:40:31,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:40:31,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:40:31,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028641281] [2024-09-21 11:40:31,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:40:31,405 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:40:31,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:40:31,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:40:31,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:40:31,406 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-21 11:40:31,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:40:31,467 INFO L93 Difference]: Finished difference Result 147 states and 207 transitions. [2024-09-21 11:40:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:40:31,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2024-09-21 11:40:31,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:40:31,469 INFO L225 Difference]: With dead ends: 147 [2024-09-21 11:40:31,469 INFO L226 Difference]: Without dead ends: 145 [2024-09-21 11:40:31,469 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-21 11:40:31,470 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:40:31,470 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 112 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:40:31,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-21 11:40:31,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2024-09-21 11:40:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 87 states have internal predecessors, (111), 45 states have call successors, (45), 8 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-21 11:40:31,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 199 transitions. [2024-09-21 11:40:31,528 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 199 transitions. Word has length 35 [2024-09-21 11:40:31,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:40:31,528 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 199 transitions. [2024-09-21 11:40:31,531 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-21 11:40:31,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:31,531 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 199 transitions. [2024-09-21 11:40:31,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-21 11:40:31,532 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:40:31,532 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:40:31,551 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-21 11:40:31,732 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-21 11:40:31,733 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:40:31,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:31,733 INFO L85 PathProgramCache]: Analyzing trace with hash -939315489, now seen corresponding path program 1 times [2024-09-21 11:40:31,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:40:31,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185121831] [2024-09-21 11:40:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:31,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:40:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:40:31,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411196739] [2024-09-21 11:40:31,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:31,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:31,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:40:31,751 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:40:31,757 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 11:40:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:31,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-21 11:40:31,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:40:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 11:40:31,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:40:31,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:40:31,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185121831] [2024-09-21 11:40:31,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:40:31,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411196739] [2024-09-21 11:40:31,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411196739] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:40:31,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:40:31,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-21 11:40:31,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044991925] [2024-09-21 11:40:31,940 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 11:40:31,940 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-21 11:40:31,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:40:31,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-21 11:40:31,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-21 11:40:31,941 INFO L87 Difference]: Start difference. First operand 139 states and 199 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 11:40:32,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:40:32,068 INFO L93 Difference]: Finished difference Result 152 states and 210 transitions. [2024-09-21 11:40:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-21 11:40:32,069 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-09-21 11:40:32,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:40:32,071 INFO L225 Difference]: With dead ends: 152 [2024-09-21 11:40:32,072 INFO L226 Difference]: Without dead ends: 150 [2024-09-21 11:40:32,072 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-21 11:40:32,073 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:40:32,073 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 191 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:40:32,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-21 11:40:32,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2024-09-21 11:40:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 93 states have internal predecessors, (117), 45 states have call successors, (45), 10 states have call predecessors, (45), 9 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-21 11:40:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 205 transitions. [2024-09-21 11:40:32,106 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 205 transitions. Word has length 35 [2024-09-21 11:40:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:40:32,106 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 205 transitions. [2024-09-21 11:40:32,107 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 11:40:32,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 205 transitions. [2024-09-21 11:40:32,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-21 11:40:32,108 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:40:32,108 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:40:32,120 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-21 11:40:32,311 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:32,312 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:40:32,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:32,312 INFO L85 PathProgramCache]: Analyzing trace with hash -660845849, now seen corresponding path program 2 times [2024-09-21 11:40:32,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:40:32,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388443077] [2024-09-21 11:40:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:32,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:40:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:32,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:40:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:32,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:40:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:32,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 11:40:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 11:40:32,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:40:32,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388443077] [2024-09-21 11:40:32,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388443077] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:40:32,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:40:32,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:40:32,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449725773] [2024-09-21 11:40:32,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:40:32,374 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:40:32,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:40:32,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:40:32,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:40:32,375 INFO L87 Difference]: Start difference. First operand 147 states and 205 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-21 11:40:32,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:40:32,460 INFO L93 Difference]: Finished difference Result 186 states and 257 transitions. [2024-09-21 11:40:32,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-21 11:40:32,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-09-21 11:40:32,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:40:32,462 INFO L225 Difference]: With dead ends: 186 [2024-09-21 11:40:32,463 INFO L226 Difference]: Without dead ends: 130 [2024-09-21 11:40:32,464 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-21 11:40:32,465 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 18 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:40:32,465 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 148 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:40:32,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-21 11:40:32,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2024-09-21 11:40:32,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 76 states have internal predecessors, (91), 37 states have call successors, (37), 10 states have call predecessors, (37), 9 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2024-09-21 11:40:32,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 163 transitions. [2024-09-21 11:40:32,484 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 163 transitions. Word has length 35 [2024-09-21 11:40:32,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:40:32,485 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 163 transitions. [2024-09-21 11:40:32,485 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-21 11:40:32,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:32,487 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 163 transitions. [2024-09-21 11:40:32,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-21 11:40:32,489 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:40:32,489 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:40:32,489 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-21 11:40:32,489 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:40:32,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:32,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1428718823, now seen corresponding path program 1 times [2024-09-21 11:40:32,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:40:32,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027062852] [2024-09-21 11:40:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:32,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:40:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:40:32,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907898613] [2024-09-21 11:40:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:32,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:32,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:40:32,508 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:40:32,509 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 11:40:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:32,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-21 11:40:32,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:40:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-21 11:40:32,584 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 11:40:32,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:40:32,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027062852] [2024-09-21 11:40:32,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:40:32,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907898613] [2024-09-21 11:40:32,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907898613] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:40:32,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:40:32,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:40:32,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727321037] [2024-09-21 11:40:32,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:40:32,586 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:40:32,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:40:32,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:40:32,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:40:32,586 INFO L87 Difference]: Start difference. First operand 122 states and 163 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-21 11:40:32,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:40:32,646 INFO L93 Difference]: Finished difference Result 180 states and 260 transitions. [2024-09-21 11:40:32,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:40:32,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2024-09-21 11:40:32,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:40:32,647 INFO L225 Difference]: With dead ends: 180 [2024-09-21 11:40:32,647 INFO L226 Difference]: Without dead ends: 178 [2024-09-21 11:40:32,648 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-21 11:40:32,648 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:40:32,648 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:40:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-09-21 11:40:32,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2024-09-21 11:40:32,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 86 states have (on average 1.186046511627907) internal successors, (102), 95 states have internal predecessors, (102), 69 states have call successors, (69), 11 states have call predecessors, (69), 10 states have return successors, (67), 59 states have call predecessors, (67), 67 states have call successors, (67) [2024-09-21 11:40:32,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 238 transitions. [2024-09-21 11:40:32,673 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 238 transitions. Word has length 40 [2024-09-21 11:40:32,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:40:32,673 INFO L474 AbstractCegarLoop]: Abstraction has 166 states and 238 transitions. [2024-09-21 11:40:32,673 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-21 11:40:32,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:32,673 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 238 transitions. [2024-09-21 11:40:32,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-21 11:40:32,674 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:40:32,674 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:40:32,688 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-21 11:40:32,875 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:32,875 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:40:32,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:32,876 INFO L85 PathProgramCache]: Analyzing trace with hash -262492089, now seen corresponding path program 1 times [2024-09-21 11:40:32,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:40:32,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853198595] [2024-09-21 11:40:32,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:32,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:40:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:40:32,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737504604] [2024-09-21 11:40:32,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:32,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:32,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:40:32,896 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:40:32,899 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 11:40:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:32,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-21 11:40:32,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:40:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-21 11:40:33,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:40:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-21 11:40:34,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:40:34,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853198595] [2024-09-21 11:40:34,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:40:34,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737504604] [2024-09-21 11:40:34,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737504604] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:40:34,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:40:34,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-21 11:40:34,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665607073] [2024-09-21 11:40:34,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:40:34,737 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-21 11:40:34,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:40:34,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-21 11:40:34,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-09-21 11:40:34,738 INFO L87 Difference]: Start difference. First operand 166 states and 238 transitions. Second operand has 23 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-21 11:40:38,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:40:38,040 INFO L93 Difference]: Finished difference Result 445 states and 663 transitions. [2024-09-21 11:40:38,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-21 11:40:38,041 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 52 [2024-09-21 11:40:38,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:40:38,044 INFO L225 Difference]: With dead ends: 445 [2024-09-21 11:40:38,044 INFO L226 Difference]: Without dead ends: 342 [2024-09-21 11:40:38,045 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2024-09-21 11:40:38,046 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 170 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-21 11:40:38,046 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 408 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-21 11:40:38,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-09-21 11:40:38,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 256. [2024-09-21 11:40:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 149 states have (on average 1.2080536912751678) internal successors, (180), 156 states have internal predecessors, (180), 93 states have call successors, (93), 14 states have call predecessors, (93), 13 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2024-09-21 11:40:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 364 transitions. [2024-09-21 11:40:38,143 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 364 transitions. Word has length 52 [2024-09-21 11:40:38,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:40:38,143 INFO L474 AbstractCegarLoop]: Abstraction has 256 states and 364 transitions. [2024-09-21 11:40:38,143 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-21 11:40:38,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:38,144 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 364 transitions. [2024-09-21 11:40:38,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-21 11:40:38,145 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:40:38,145 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:40:38,160 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-21 11:40:38,345 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:38,346 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:40:38,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:38,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1924337224, now seen corresponding path program 1 times [2024-09-21 11:40:38,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:40:38,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172774998] [2024-09-21 11:40:38,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:38,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:40:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:40:38,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820037342] [2024-09-21 11:40:38,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:38,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:38,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:40:38,368 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:40:38,369 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-21 11:40:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:38,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-21 11:40:38,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:40:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-09-21 11:40:38,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:40:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-21 11:40:38,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:40:38,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172774998] [2024-09-21 11:40:38,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:40:38,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820037342] [2024-09-21 11:40:38,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820037342] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-21 11:40:38,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:40:38,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-21 11:40:38,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414738053] [2024-09-21 11:40:38,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:40:38,574 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:40:38,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:40:38,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:40:38,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-21 11:40:38,574 INFO L87 Difference]: Start difference. First operand 256 states and 364 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-21 11:40:38,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:40:38,702 INFO L93 Difference]: Finished difference Result 262 states and 369 transitions. [2024-09-21 11:40:38,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:40:38,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 62 [2024-09-21 11:40:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:40:38,706 INFO L225 Difference]: With dead ends: 262 [2024-09-21 11:40:38,706 INFO L226 Difference]: Without dead ends: 260 [2024-09-21 11:40:38,707 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-21 11:40:38,707 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:40:38,707 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 115 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:40:38,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-09-21 11:40:38,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2024-09-21 11:40:38,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 159 states have internal predecessors, (183), 93 states have call successors, (93), 15 states have call predecessors, (93), 14 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2024-09-21 11:40:38,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 367 transitions. [2024-09-21 11:40:38,794 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 367 transitions. Word has length 62 [2024-09-21 11:40:38,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:40:38,795 INFO L474 AbstractCegarLoop]: Abstraction has 260 states and 367 transitions. [2024-09-21 11:40:38,795 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-21 11:40:38,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:38,795 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 367 transitions. [2024-09-21 11:40:38,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-21 11:40:38,796 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:40:38,796 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:40:38,808 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-21 11:40:38,996 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-21 11:40:38,997 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:40:38,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:38,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1180380411, now seen corresponding path program 1 times [2024-09-21 11:40:38,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:40:38,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416153815] [2024-09-21 11:40:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:38,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:40:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:40:39,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061991221] [2024-09-21 11:40:39,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:39,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:39,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:40:39,010 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:40:39,011 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-21 11:40:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:39,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-21 11:40:39,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:40:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-21 11:40:39,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:40:39,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:40:39,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416153815] [2024-09-21 11:40:39,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:40:39,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061991221] [2024-09-21 11:40:39,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061991221] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:40:39,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:40:39,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-21 11:40:39,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671002091] [2024-09-21 11:40:39,487 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 11:40:39,487 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-21 11:40:39,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:40:39,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-21 11:40:39,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-09-21 11:40:39,488 INFO L87 Difference]: Start difference. First operand 260 states and 367 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-21 11:40:40,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:40:40,054 INFO L93 Difference]: Finished difference Result 318 states and 454 transitions. [2024-09-21 11:40:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-21 11:40:40,054 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 60 [2024-09-21 11:40:40,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:40:40,056 INFO L225 Difference]: With dead ends: 318 [2024-09-21 11:40:40,056 INFO L226 Difference]: Without dead ends: 316 [2024-09-21 11:40:40,056 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2024-09-21 11:40:40,057 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 83 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 11:40:40,057 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 443 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 11:40:40,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-21 11:40:40,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 311. [2024-09-21 11:40:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 178 states have (on average 1.2078651685393258) internal successors, (215), 188 states have internal predecessors, (215), 117 states have call successors, (117), 16 states have call predecessors, (117), 15 states have return successors, (115), 106 states have call predecessors, (115), 115 states have call successors, (115) [2024-09-21 11:40:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 447 transitions. [2024-09-21 11:40:40,163 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 447 transitions. Word has length 60 [2024-09-21 11:40:40,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:40:40,163 INFO L474 AbstractCegarLoop]: Abstraction has 311 states and 447 transitions. [2024-09-21 11:40:40,163 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-21 11:40:40,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:40,164 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 447 transitions. [2024-09-21 11:40:40,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-21 11:40:40,164 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:40:40,164 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:40:40,178 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-21 11:40:40,367 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-21 11:40:40,367 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:40:40,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:40,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1640416879, now seen corresponding path program 2 times [2024-09-21 11:40:40,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:40:40,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859019457] [2024-09-21 11:40:40,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:40,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:40:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:40,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:40:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:40,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:40:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:40,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 11:40:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:40,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-21 11:40:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:40,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-21 11:40:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:40,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-21 11:40:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:40,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-21 11:40:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:40,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-21 11:40:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:40,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-21 11:40:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-09-21 11:40:40,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:40:40,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859019457] [2024-09-21 11:40:40,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859019457] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:40:40,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:40:40,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:40:40,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423101193] [2024-09-21 11:40:40,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:40:40,463 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:40:40,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:40:40,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:40:40,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:40:40,464 INFO L87 Difference]: Start difference. First operand 311 states and 447 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-21 11:40:40,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:40:40,611 INFO L93 Difference]: Finished difference Result 534 states and 771 transitions. [2024-09-21 11:40:40,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:40:40,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 65 [2024-09-21 11:40:40,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:40:40,614 INFO L225 Difference]: With dead ends: 534 [2024-09-21 11:40:40,614 INFO L226 Difference]: Without dead ends: 320 [2024-09-21 11:40:40,615 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-21 11:40:40,616 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:40:40,616 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 109 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:40:40,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-09-21 11:40:40,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 308. [2024-09-21 11:40:40,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 183 states have (on average 1.2076502732240437) internal successors, (221), 184 states have internal predecessors, (221), 109 states have call successors, (109), 16 states have call predecessors, (109), 15 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2024-09-21 11:40:40,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 437 transitions. [2024-09-21 11:40:40,722 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 437 transitions. Word has length 65 [2024-09-21 11:40:40,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:40:40,722 INFO L474 AbstractCegarLoop]: Abstraction has 308 states and 437 transitions. [2024-09-21 11:40:40,722 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-21 11:40:40,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:40,723 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 437 transitions. [2024-09-21 11:40:40,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-21 11:40:40,726 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:40:40,726 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:40:40,726 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-09-21 11:40:40,727 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:40:40,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:40,727 INFO L85 PathProgramCache]: Analyzing trace with hash -629454135, now seen corresponding path program 3 times [2024-09-21 11:40:40,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:40:40,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825450809] [2024-09-21 11:40:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:40,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:40:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:40:40,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250995761] [2024-09-21 11:40:40,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:40:40,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:40,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:40:40,749 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:40:40,750 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-21 11:40:40,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-21 11:40:40,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:40:40,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-21 11:40:40,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:40:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-21 11:40:41,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:40:45,655 WARN L854 $PredicateComparison]: unable to prove that (or (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~x~0 c_main_~k~0) c_main_~c~0 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (forall ((v_main_~p~0_23 Int) (v_main_~r~0_23 Int)) (or (< (+ (* v_main_~p~0_23 c_main_~x~0) (* v_main_~r~0_23 c_main_~y~0)) c_main_~b~0) (< c_main_~q~0 v_main_~p~0_23) (< c_main_~s~0 v_main_~r~0_23)))) is different from false [2024-09-21 11:40:46,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:40:46,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825450809] [2024-09-21 11:40:46,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:40:46,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250995761] [2024-09-21 11:40:46,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250995761] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:40:46,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:40:46,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-21 11:40:46,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880966333] [2024-09-21 11:40:46,229 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 11:40:46,231 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-21 11:40:46,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:40:46,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-21 11:40:46,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=462, Unknown=1, NotChecked=44, Total=600 [2024-09-21 11:40:46,232 INFO L87 Difference]: Start difference. First operand 308 states and 437 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-21 11:40:46,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:40:46,862 INFO L93 Difference]: Finished difference Result 336 states and 461 transitions. [2024-09-21 11:40:46,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-21 11:40:46,862 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 65 [2024-09-21 11:40:46,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:40:46,864 INFO L225 Difference]: With dead ends: 336 [2024-09-21 11:40:46,864 INFO L226 Difference]: Without dead ends: 334 [2024-09-21 11:40:46,865 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=155, Invalid=778, Unknown=1, NotChecked=58, Total=992 [2024-09-21 11:40:46,865 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 65 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 11:40:46,865 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 441 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 11:40:46,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2024-09-21 11:40:46,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 324. [2024-09-21 11:40:46,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 195 states have (on average 1.1948717948717948) internal successors, (233), 196 states have internal predecessors, (233), 109 states have call successors, (109), 20 states have call predecessors, (109), 19 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2024-09-21 11:40:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 449 transitions. [2024-09-21 11:40:46,972 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 449 transitions. Word has length 65 [2024-09-21 11:40:46,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:40:46,972 INFO L474 AbstractCegarLoop]: Abstraction has 324 states and 449 transitions. [2024-09-21 11:40:46,972 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-21 11:40:46,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 449 transitions. [2024-09-21 11:40:46,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-21 11:40:46,974 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:40:46,974 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:40:46,987 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-21 11:40:47,174 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-21 11:40:47,175 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:40:47,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:47,175 INFO L85 PathProgramCache]: Analyzing trace with hash -232813088, now seen corresponding path program 1 times [2024-09-21 11:40:47,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:40:47,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384797314] [2024-09-21 11:40:47,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:47,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:40:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:40:47,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586374559] [2024-09-21 11:40:47,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:47,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:47,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:40:47,188 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:40:47,189 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-21 11:40:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:47,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-21 11:40:47,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:40:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-21 11:40:48,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:40:49,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:40:49,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384797314] [2024-09-21 11:40:49,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:40:49,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586374559] [2024-09-21 11:40:49,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586374559] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:40:49,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:40:49,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-21 11:40:49,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536971213] [2024-09-21 11:40:49,316 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 11:40:49,316 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-21 11:40:49,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:40:49,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-21 11:40:49,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2024-09-21 11:40:49,317 INFO L87 Difference]: Start difference. First operand 324 states and 449 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-21 11:40:50,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:40:50,272 INFO L93 Difference]: Finished difference Result 400 states and 561 transitions. [2024-09-21 11:40:50,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-21 11:40:50,272 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 79 [2024-09-21 11:40:50,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:40:50,274 INFO L225 Difference]: With dead ends: 400 [2024-09-21 11:40:50,274 INFO L226 Difference]: Without dead ends: 397 [2024-09-21 11:40:50,275 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2024-09-21 11:40:50,275 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 90 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-21 11:40:50,275 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 537 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-21 11:40:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2024-09-21 11:40:50,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 385. [2024-09-21 11:40:50,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 226 states have (on average 1.2079646017699115) internal successors, (273), 227 states have internal predecessors, (273), 137 states have call successors, (137), 22 states have call predecessors, (137), 21 states have return successors, (135), 135 states have call predecessors, (135), 135 states have call successors, (135) [2024-09-21 11:40:50,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 545 transitions. [2024-09-21 11:40:50,421 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 545 transitions. Word has length 79 [2024-09-21 11:40:50,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:40:50,422 INFO L474 AbstractCegarLoop]: Abstraction has 385 states and 545 transitions. [2024-09-21 11:40:50,422 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-21 11:40:50,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:50,422 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 545 transitions. [2024-09-21 11:40:50,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-21 11:40:50,423 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:40:50,423 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:40:50,435 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-21 11:40:50,627 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-21 11:40:50,627 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:40:50,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:50,628 INFO L85 PathProgramCache]: Analyzing trace with hash -203814726, now seen corresponding path program 1 times [2024-09-21 11:40:50,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:40:50,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063663085] [2024-09-21 11:40:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:50,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:40:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:40:50,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438875006] [2024-09-21 11:40:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:50,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:50,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:40:50,642 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:40:50,643 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-21 11:40:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:50,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-21 11:40:50,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:40:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-21 11:40:50,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:40:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-09-21 11:40:51,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:40:51,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063663085] [2024-09-21 11:40:51,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:40:51,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438875006] [2024-09-21 11:40:51,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438875006] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:40:51,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:40:51,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-21 11:40:51,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518701636] [2024-09-21 11:40:51,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:40:51,243 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-21 11:40:51,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:40:51,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-21 11:40:51,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-09-21 11:40:51,244 INFO L87 Difference]: Start difference. First operand 385 states and 545 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-21 11:40:52,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:40:52,485 INFO L93 Difference]: Finished difference Result 885 states and 1384 transitions. [2024-09-21 11:40:52,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-21 11:40:52,486 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 82 [2024-09-21 11:40:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:40:52,490 INFO L225 Difference]: With dead ends: 885 [2024-09-21 11:40:52,490 INFO L226 Difference]: Without dead ends: 883 [2024-09-21 11:40:52,491 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-09-21 11:40:52,491 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 148 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-21 11:40:52,492 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 436 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-21 11:40:52,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2024-09-21 11:40:52,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 829. [2024-09-21 11:40:52,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 403 states have (on average 1.3101736972704714) internal successors, (528), 404 states have internal predecessors, (528), 401 states have call successors, (401), 25 states have call predecessors, (401), 24 states have return successors, (399), 399 states have call predecessors, (399), 399 states have call successors, (399) [2024-09-21 11:40:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1328 transitions. [2024-09-21 11:40:52,926 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1328 transitions. Word has length 82 [2024-09-21 11:40:52,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:40:52,926 INFO L474 AbstractCegarLoop]: Abstraction has 829 states and 1328 transitions. [2024-09-21 11:40:52,926 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 18 states have internal predecessors, (41), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-21 11:40:52,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:52,926 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1328 transitions. [2024-09-21 11:40:52,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-21 11:40:52,927 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:40:52,929 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:40:52,942 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-21 11:40:53,132 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-21 11:40:53,133 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:40:53,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:40:53,133 INFO L85 PathProgramCache]: Analyzing trace with hash 807148018, now seen corresponding path program 1 times [2024-09-21 11:40:53,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:40:53,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870453219] [2024-09-21 11:40:53,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:53,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:40:53,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:40:53,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017590473] [2024-09-21 11:40:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:40:53,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:40:53,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:40:53,146 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:40:53,147 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-21 11:40:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:40:53,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-21 11:40:53,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:40:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-21 11:40:53,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:40:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2024-09-21 11:40:54,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:40:54,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870453219] [2024-09-21 11:40:54,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:40:54,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017590473] [2024-09-21 11:40:54,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017590473] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:40:54,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:40:54,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-21 11:40:54,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882761988] [2024-09-21 11:40:54,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:40:54,865 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-21 11:40:54,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:40:54,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-21 11:40:54,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-09-21 11:40:54,866 INFO L87 Difference]: Start difference. First operand 829 states and 1328 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-21 11:41:07,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:07,088 INFO L93 Difference]: Finished difference Result 1191 states and 1920 transitions. [2024-09-21 11:41:07,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-21 11:41:07,089 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 82 [2024-09-21 11:41:07,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:07,095 INFO L225 Difference]: With dead ends: 1191 [2024-09-21 11:41:07,095 INFO L226 Difference]: Without dead ends: 1189 [2024-09-21 11:41:07,096 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=711, Invalid=2828, Unknown=1, NotChecked=0, Total=3540 [2024-09-21 11:41:07,096 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 160 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:41:07,096 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 719 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-09-21 11:41:07,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2024-09-21 11:41:07,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1060. [2024-09-21 11:41:07,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 511 states have (on average 1.3228962818003913) internal successors, (676), 512 states have internal predecessors, (676), 521 states have call successors, (521), 28 states have call predecessors, (521), 27 states have return successors, (519), 519 states have call predecessors, (519), 519 states have call successors, (519) [2024-09-21 11:41:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1716 transitions. [2024-09-21 11:41:07,880 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1716 transitions. Word has length 82 [2024-09-21 11:41:07,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:07,880 INFO L474 AbstractCegarLoop]: Abstraction has 1060 states and 1716 transitions. [2024-09-21 11:41:07,880 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 20 states have internal predecessors, (52), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-21 11:41:07,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:07,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1716 transitions. [2024-09-21 11:41:07,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-21 11:41:07,883 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:07,884 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:41:07,896 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-21 11:41:08,087 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-21 11:41:08,088 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:08,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:08,088 INFO L85 PathProgramCache]: Analyzing trace with hash 590263059, now seen corresponding path program 4 times [2024-09-21 11:41:08,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:08,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788129184] [2024-09-21 11:41:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:08,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:41:08,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71651138] [2024-09-21 11:41:08,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 11:41:08,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:08,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:08,101 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:08,106 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-21 11:41:08,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 11:41:08,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:41:08,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-21 11:41:08,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:09,557 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-09-21 11:41:09,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:41:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-21 11:41:10,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:10,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788129184] [2024-09-21 11:41:10,169 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:41:10,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71651138] [2024-09-21 11:41:10,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71651138] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:41:10,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:41:10,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 21 [2024-09-21 11:41:10,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688493635] [2024-09-21 11:41:10,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:41:10,170 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-21 11:41:10,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:10,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-21 11:41:10,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2024-09-21 11:41:10,171 INFO L87 Difference]: Start difference. First operand 1060 states and 1716 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-09-21 11:41:14,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:14,692 INFO L93 Difference]: Finished difference Result 1190 states and 1914 transitions. [2024-09-21 11:41:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-21 11:41:14,692 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 85 [2024-09-21 11:41:14,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:14,704 INFO L225 Difference]: With dead ends: 1190 [2024-09-21 11:41:14,704 INFO L226 Difference]: Without dead ends: 1188 [2024-09-21 11:41:14,705 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2024-09-21 11:41:14,705 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 80 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-21 11:41:14,705 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 584 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-21 11:41:14,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2024-09-21 11:41:15,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1080. [2024-09-21 11:41:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 526 states have (on average 1.3136882129277567) internal successors, (691), 527 states have internal predecessors, (691), 521 states have call successors, (521), 33 states have call predecessors, (521), 32 states have return successors, (519), 519 states have call predecessors, (519), 519 states have call successors, (519) [2024-09-21 11:41:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1731 transitions. [2024-09-21 11:41:15,670 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1731 transitions. Word has length 85 [2024-09-21 11:41:15,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:15,672 INFO L474 AbstractCegarLoop]: Abstraction has 1080 states and 1731 transitions. [2024-09-21 11:41:15,672 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 18 states have internal predecessors, (62), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-09-21 11:41:15,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:15,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1731 transitions. [2024-09-21 11:41:15,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-21 11:41:15,676 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:15,676 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:41:15,691 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-21 11:41:15,880 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:15,881 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:15,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:15,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1412818839, now seen corresponding path program 2 times [2024-09-21 11:41:15,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:15,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175512118] [2024-09-21 11:41:15,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:15,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:16,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:41:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:16,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 11:41:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:16,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 11:41:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:16,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-21 11:41:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:16,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-21 11:41:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:16,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-21 11:41:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:16,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-21 11:41:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:16,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-21 11:41:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:16,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-21 11:41:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:16,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-21 11:41:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:16,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-21 11:41:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:41:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-21 11:41:16,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:16,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175512118] [2024-09-21 11:41:16,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175512118] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:41:16,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831503472] [2024-09-21 11:41:16,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:41:16,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:16,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:16,030 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:16,042 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-21 11:41:16,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:41:16,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:41:16,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-21 11:41:16,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-21 11:41:16,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:41:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-21 11:41:16,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831503472] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:41:16,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:41:16,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-09-21 11:41:16,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577505844] [2024-09-21 11:41:16,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:41:16,312 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-21 11:41:16,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:16,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-21 11:41:16,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-21 11:41:16,312 INFO L87 Difference]: Start difference. First operand 1080 states and 1731 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-21 11:41:17,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:17,615 INFO L93 Difference]: Finished difference Result 1218 states and 1947 transitions. [2024-09-21 11:41:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-21 11:41:17,615 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 87 [2024-09-21 11:41:17,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:17,621 INFO L225 Difference]: With dead ends: 1218 [2024-09-21 11:41:17,621 INFO L226 Difference]: Without dead ends: 1211 [2024-09-21 11:41:17,622 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 194 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-09-21 11:41:17,622 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 66 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 11:41:17,622 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 404 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 11:41:17,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2024-09-21 11:41:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1049. [2024-09-21 11:41:18,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 503 states have (on average 1.320079522862823) internal successors, (664), 504 states have internal predecessors, (664), 513 states have call successors, (513), 33 states have call predecessors, (513), 32 states have return successors, (511), 511 states have call predecessors, (511), 511 states have call successors, (511) [2024-09-21 11:41:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1688 transitions. [2024-09-21 11:41:18,516 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1688 transitions. Word has length 87 [2024-09-21 11:41:18,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:18,517 INFO L474 AbstractCegarLoop]: Abstraction has 1049 states and 1688 transitions. [2024-09-21 11:41:18,517 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-21 11:41:18,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:18,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1688 transitions. [2024-09-21 11:41:18,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-21 11:41:18,520 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:18,520 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:41:18,532 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-21 11:41:18,720 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:18,721 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:18,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:18,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1409368955, now seen corresponding path program 5 times [2024-09-21 11:41:18,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:18,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014362114] [2024-09-21 11:41:18,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:18,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:41:18,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86849403] [2024-09-21 11:41:18,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 11:41:18,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:18,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:18,744 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:18,745 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-21 11:41:19,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-21 11:41:19,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:41:19,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-21 11:41:19,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-21 11:41:20,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:41:25,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:25,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014362114] [2024-09-21 11:41:25,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:41:25,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86849403] [2024-09-21 11:41:25,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86849403] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:41:25,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:41:25,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-21 11:41:25,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548984647] [2024-09-21 11:41:25,383 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 11:41:25,383 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-21 11:41:25,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:25,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-21 11:41:25,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2024-09-21 11:41:25,384 INFO L87 Difference]: Start difference. First operand 1049 states and 1688 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-21 11:41:27,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:27,405 INFO L93 Difference]: Finished difference Result 1186 states and 1894 transitions. [2024-09-21 11:41:27,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-21 11:41:27,406 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 90 [2024-09-21 11:41:27,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:27,414 INFO L225 Difference]: With dead ends: 1186 [2024-09-21 11:41:27,417 INFO L226 Difference]: Without dead ends: 1184 [2024-09-21 11:41:27,418 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2024-09-21 11:41:27,418 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 55 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-21 11:41:27,419 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 459 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-21 11:41:27,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2024-09-21 11:41:28,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1166. [2024-09-21 11:41:28,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 560 states have (on average 1.3178571428571428) internal successors, (738), 561 states have internal predecessors, (738), 569 states have call successors, (569), 37 states have call predecessors, (569), 36 states have return successors, (567), 567 states have call predecessors, (567), 567 states have call successors, (567) [2024-09-21 11:41:28,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1874 transitions. [2024-09-21 11:41:28,350 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1874 transitions. Word has length 90 [2024-09-21 11:41:28,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:28,352 INFO L474 AbstractCegarLoop]: Abstraction has 1166 states and 1874 transitions. [2024-09-21 11:41:28,352 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 16 states have internal predecessors, (40), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-21 11:41:28,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:28,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1874 transitions. [2024-09-21 11:41:28,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-21 11:41:28,354 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:28,354 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:41:28,360 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-21 11:41:28,558 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:28,558 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:28,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:28,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1093787319, now seen corresponding path program 2 times [2024-09-21 11:41:28,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:28,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278836500] [2024-09-21 11:41:28,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:28,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:41:28,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977568979] [2024-09-21 11:41:28,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:41:28,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:28,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:28,570 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:28,571 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-21 11:41:28,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:41:28,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:41:28,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-21 11:41:28,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2024-09-21 11:41:29,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:41:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-09-21 11:41:31,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:31,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278836500] [2024-09-21 11:41:31,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:41:31,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977568979] [2024-09-21 11:41:31,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977568979] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:41:31,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:41:31,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2024-09-21 11:41:31,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374430362] [2024-09-21 11:41:31,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:41:31,828 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-21 11:41:31,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:31,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-21 11:41:31,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2024-09-21 11:41:31,829 INFO L87 Difference]: Start difference. First operand 1166 states and 1874 transitions. Second operand has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-21 11:41:44,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:44,359 INFO L93 Difference]: Finished difference Result 1381 states and 2196 transitions. [2024-09-21 11:41:44,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-09-21 11:41:44,360 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 96 [2024-09-21 11:41:44,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:44,366 INFO L225 Difference]: With dead ends: 1381 [2024-09-21 11:41:44,366 INFO L226 Difference]: Without dead ends: 1373 [2024-09-21 11:41:44,368 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1128, Invalid=4572, Unknown=0, NotChecked=0, Total=5700 [2024-09-21 11:41:44,368 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 232 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-09-21 11:41:44,368 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 765 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-09-21 11:41:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2024-09-21 11:41:45,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1344. [2024-09-21 11:41:45,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 653 states have (on average 1.3169984686064318) internal successors, (860), 654 states have internal predecessors, (860), 649 states have call successors, (649), 42 states have call predecessors, (649), 41 states have return successors, (647), 647 states have call predecessors, (647), 647 states have call successors, (647) [2024-09-21 11:41:45,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 2156 transitions. [2024-09-21 11:41:45,566 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 2156 transitions. Word has length 96 [2024-09-21 11:41:45,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:45,566 INFO L474 AbstractCegarLoop]: Abstraction has 1344 states and 2156 transitions. [2024-09-21 11:41:45,567 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-21 11:41:45,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:45,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 2156 transitions. [2024-09-21 11:41:45,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-21 11:41:45,568 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:45,568 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:41:45,584 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-21 11:41:45,772 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-21 11:41:45,773 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:45,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:45,773 INFO L85 PathProgramCache]: Analyzing trace with hash -187092685, now seen corresponding path program 6 times [2024-09-21 11:41:45,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:45,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510122448] [2024-09-21 11:41:45,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:45,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:41:45,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95714018] [2024-09-21 11:41:45,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-21 11:41:45,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:45,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:45,791 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:45,793 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-21 11:41:45,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-21 11:41:45,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:41:45,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-21 11:41:45,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 91 proven. 35 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-09-21 11:41:47,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:41:49,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:49,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510122448] [2024-09-21 11:41:49,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:41:49,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95714018] [2024-09-21 11:41:49,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95714018] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:41:49,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:41:49,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-21 11:41:49,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061695857] [2024-09-21 11:41:49,437 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 11:41:49,439 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-21 11:41:49,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:49,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-21 11:41:49,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2024-09-21 11:41:49,440 INFO L87 Difference]: Start difference. First operand 1344 states and 2156 transitions. Second operand has 22 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-21 11:41:52,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:41:52,458 INFO L93 Difference]: Finished difference Result 1474 states and 2358 transitions. [2024-09-21 11:41:52,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-21 11:41:52,459 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) Word has length 95 [2024-09-21 11:41:52,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:41:52,466 INFO L225 Difference]: With dead ends: 1474 [2024-09-21 11:41:52,466 INFO L226 Difference]: Without dead ends: 1472 [2024-09-21 11:41:52,467 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2024-09-21 11:41:52,467 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 68 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-21 11:41:52,467 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 363 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-21 11:41:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2024-09-21 11:41:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1356. [2024-09-21 11:41:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 662 states have (on average 1.3126888217522659) internal successors, (869), 664 states have internal predecessors, (869), 651 states have call successors, (651), 43 states have call predecessors, (651), 42 states have return successors, (649), 648 states have call predecessors, (649), 649 states have call successors, (649) [2024-09-21 11:41:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 2169 transitions. [2024-09-21 11:41:53,758 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 2169 transitions. Word has length 95 [2024-09-21 11:41:53,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:41:53,759 INFO L474 AbstractCegarLoop]: Abstraction has 1356 states and 2169 transitions. [2024-09-21 11:41:53,759 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-21 11:41:53,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:53,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 2169 transitions. [2024-09-21 11:41:53,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-21 11:41:53,760 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:41:53,760 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:41:53,767 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-21 11:41:53,964 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-21 11:41:53,965 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:41:53,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:41:53,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1017703828, now seen corresponding path program 3 times [2024-09-21 11:41:53,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:41:53,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555931833] [2024-09-21 11:41:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:41:53,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:41:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:41:53,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426297128] [2024-09-21 11:41:53,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:41:53,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:41:53,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:41:53,980 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:41:53,981 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-21 11:41:54,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-21 11:41:54,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:41:54,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-21 11:41:54,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:41:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2024-09-21 11:41:54,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:41:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-09-21 11:41:58,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:41:58,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555931833] [2024-09-21 11:41:58,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:41:58,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426297128] [2024-09-21 11:41:58,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426297128] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:41:58,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:41:58,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2024-09-21 11:41:58,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144392506] [2024-09-21 11:41:58,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:41:58,910 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-21 11:41:58,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:41:58,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-21 11:41:58,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2024-09-21 11:41:58,911 INFO L87 Difference]: Start difference. First operand 1356 states and 2169 transitions. Second operand has 30 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-21 11:42:19,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:42:19,742 INFO L93 Difference]: Finished difference Result 2168 states and 3461 transitions. [2024-09-21 11:42:19,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-09-21 11:42:19,743 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 99 [2024-09-21 11:42:19,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:42:19,750 INFO L225 Difference]: With dead ends: 2168 [2024-09-21 11:42:19,750 INFO L226 Difference]: Without dead ends: 1621 [2024-09-21 11:42:19,754 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2737 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=1791, Invalid=7715, Unknown=0, NotChecked=0, Total=9506 [2024-09-21 11:42:19,755 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 255 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-09-21 11:42:19,755 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 761 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-09-21 11:42:19,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2024-09-21 11:42:21,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1481. [2024-09-21 11:42:21,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 723 states have (on average 1.3084370677731674) internal successors, (946), 725 states have internal predecessors, (946), 711 states have call successors, (711), 47 states have call predecessors, (711), 46 states have return successors, (709), 708 states have call predecessors, (709), 709 states have call successors, (709) [2024-09-21 11:42:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2366 transitions. [2024-09-21 11:42:21,350 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2366 transitions. Word has length 99 [2024-09-21 11:42:21,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:42:21,351 INFO L474 AbstractCegarLoop]: Abstraction has 1481 states and 2366 transitions. [2024-09-21 11:42:21,351 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-21 11:42:21,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:42:21,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2366 transitions. [2024-09-21 11:42:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-21 11:42:21,352 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:42:21,352 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:42:21,358 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-21 11:42:21,552 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-21 11:42:21,553 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:42:21,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:42:21,553 INFO L85 PathProgramCache]: Analyzing trace with hash -396138734, now seen corresponding path program 4 times [2024-09-21 11:42:21,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:42:21,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396597697] [2024-09-21 11:42:21,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:42:21,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:42:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:42:21,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067145300] [2024-09-21 11:42:21,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 11:42:21,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:42:21,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:42:21,566 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:42:21,567 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-21 11:42:21,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 11:42:21,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:42:21,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-21 11:42:21,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:42:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 52 proven. 46 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-21 11:42:23,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:42:32,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:42:32,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396597697] [2024-09-21 11:42:32,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:42:32,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067145300] [2024-09-21 11:42:32,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067145300] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:42:32,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:42:32,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-21 11:42:32,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704537301] [2024-09-21 11:42:32,735 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 11:42:32,735 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-21 11:42:32,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:42:32,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-21 11:42:32,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1172, Unknown=1, NotChecked=0, Total=1332 [2024-09-21 11:42:32,736 INFO L87 Difference]: Start difference. First operand 1481 states and 2366 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-09-21 11:42:36,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:42:36,752 INFO L93 Difference]: Finished difference Result 1613 states and 2569 transitions. [2024-09-21 11:42:36,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-21 11:42:36,753 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 104 [2024-09-21 11:42:36,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:42:36,760 INFO L225 Difference]: With dead ends: 1613 [2024-09-21 11:42:36,760 INFO L226 Difference]: Without dead ends: 1606 [2024-09-21 11:42:36,761 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=286, Invalid=1969, Unknown=1, NotChecked=0, Total=2256 [2024-09-21 11:42:36,762 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 84 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:42:36,762 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 711 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-21 11:42:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2024-09-21 11:42:38,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1485. [2024-09-21 11:42:38,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 726 states have (on average 1.3071625344352618) internal successors, (949), 728 states have internal predecessors, (949), 711 states have call successors, (711), 48 states have call predecessors, (711), 47 states have return successors, (709), 708 states have call predecessors, (709), 709 states have call successors, (709) [2024-09-21 11:42:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2369 transitions. [2024-09-21 11:42:38,454 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2369 transitions. Word has length 104 [2024-09-21 11:42:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:42:38,454 INFO L474 AbstractCegarLoop]: Abstraction has 1485 states and 2369 transitions. [2024-09-21 11:42:38,455 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 21 states have internal predecessors, (42), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2024-09-21 11:42:38,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:42:38,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2369 transitions. [2024-09-21 11:42:38,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-21 11:42:38,457 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:42:38,457 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:42:38,470 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-21 11:42:38,661 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-21 11:42:38,662 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:42:38,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:42:38,662 INFO L85 PathProgramCache]: Analyzing trace with hash 920643019, now seen corresponding path program 2 times [2024-09-21 11:42:38,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:42:38,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319373466] [2024-09-21 11:42:38,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:42:38,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:42:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:42:38,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13500773] [2024-09-21 11:42:38,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:42:38,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:42:38,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:42:38,677 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:42:38,678 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-21 11:42:38,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:42:38,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:42:38,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-21 11:42:38,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:42:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 52 proven. 56 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2024-09-21 11:42:39,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:42:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 56 proven. 52 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2024-09-21 11:42:44,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:42:44,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319373466] [2024-09-21 11:42:44,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:42:44,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13500773] [2024-09-21 11:42:44,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13500773] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:42:44,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:42:44,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2024-09-21 11:42:44,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733157892] [2024-09-21 11:42:44,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:42:44,618 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-21 11:42:44,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:42:44,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-21 11:42:44,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2024-09-21 11:42:44,619 INFO L87 Difference]: Start difference. First operand 1485 states and 2369 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-21 11:43:04,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:43:04,161 INFO L93 Difference]: Finished difference Result 1742 states and 2731 transitions. [2024-09-21 11:43:04,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-09-21 11:43:04,161 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) Word has length 109 [2024-09-21 11:43:04,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:43:04,169 INFO L225 Difference]: With dead ends: 1742 [2024-09-21 11:43:04,169 INFO L226 Difference]: Without dead ends: 1740 [2024-09-21 11:43:04,171 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1349, Invalid=5457, Unknown=0, NotChecked=0, Total=6806 [2024-09-21 11:43:04,171 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 180 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-09-21 11:43:04,171 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 812 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2024-09-21 11:43:04,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2024-09-21 11:43:06,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1596. [2024-09-21 11:43:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 809 states have (on average 1.2941903584672436) internal successors, (1047), 814 states have internal predecessors, (1047), 733 states have call successors, (733), 54 states have call predecessors, (733), 53 states have return successors, (731), 727 states have call predecessors, (731), 731 states have call successors, (731) [2024-09-21 11:43:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2511 transitions. [2024-09-21 11:43:06,295 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2511 transitions. Word has length 109 [2024-09-21 11:43:06,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:43:06,296 INFO L474 AbstractCegarLoop]: Abstraction has 1596 states and 2511 transitions. [2024-09-21 11:43:06,296 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-21 11:43:06,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:06,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2511 transitions. [2024-09-21 11:43:06,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-21 11:43:06,297 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:43:06,298 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:43:06,314 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-21 11:43:06,501 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-21 11:43:06,502 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:43:06,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:06,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2081223370, now seen corresponding path program 5 times [2024-09-21 11:43:06,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:43:06,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456354894] [2024-09-21 11:43:06,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:43:06,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:43:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:43:06,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946031156] [2024-09-21 11:43:06,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 11:43:06,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:43:06,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:43:06,519 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:43:06,521 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-21 11:43:06,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-21 11:43:06,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:43:06,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-09-21 11:43:06,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:43:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-21 11:43:07,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:43:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 91 proven. 64 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2024-09-21 11:43:12,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:43:12,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456354894] [2024-09-21 11:43:12,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:43:12,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946031156] [2024-09-21 11:43:12,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946031156] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:43:12,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:43:12,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2024-09-21 11:43:12,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602585691] [2024-09-21 11:43:12,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:43:12,171 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-21 11:43:12,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:43:12,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-21 11:43:12,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2024-09-21 11:43:12,173 INFO L87 Difference]: Start difference. First operand 1596 states and 2511 transitions. Second operand has 34 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 10 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-21 11:43:20,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-21 11:43:24,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-21 11:43:38,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-21 11:43:42,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:43:42,566 INFO L93 Difference]: Finished difference Result 1788 states and 2773 transitions. [2024-09-21 11:43:42,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-09-21 11:43:42,567 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 10 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) Word has length 109 [2024-09-21 11:43:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:43:42,576 INFO L225 Difference]: With dead ends: 1788 [2024-09-21 11:43:42,576 INFO L226 Difference]: Without dead ends: 1784 [2024-09-21 11:43:42,577 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=1369, Invalid=5771, Unknown=0, NotChecked=0, Total=7140 [2024-09-21 11:43:42,578 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 287 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 338 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2024-09-21 11:43:42,578 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 962 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 1425 Invalid, 1 Unknown, 0 Unchecked, 12.3s Time] [2024-09-21 11:43:42,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2024-09-21 11:43:45,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1695. [2024-09-21 11:43:45,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 853 states have (on average 1.2919109026963658) internal successors, (1102), 858 states have internal predecessors, (1102), 781 states have call successors, (781), 61 states have call predecessors, (781), 60 states have return successors, (779), 775 states have call predecessors, (779), 779 states have call successors, (779) [2024-09-21 11:43:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2662 transitions. [2024-09-21 11:43:45,533 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2662 transitions. Word has length 109 [2024-09-21 11:43:45,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:43:45,534 INFO L474 AbstractCegarLoop]: Abstraction has 1695 states and 2662 transitions. [2024-09-21 11:43:45,534 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 10 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-21 11:43:45,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:45,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2662 transitions. [2024-09-21 11:43:45,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-09-21 11:43:45,536 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:43:45,536 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:43:45,550 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-21 11:43:45,736 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-21 11:43:45,737 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:43:45,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:45,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1733684403, now seen corresponding path program 6 times [2024-09-21 11:43:45,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:43:45,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707688772] [2024-09-21 11:43:45,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:43:45,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:43:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:43:45,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958263223] [2024-09-21 11:43:45,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-21 11:43:45,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:43:45,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:43:45,769 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:43:45,771 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-21 11:43:45,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-21 11:43:45,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:43:45,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-09-21 11:43:45,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:43:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 95 proven. 67 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2024-09-21 11:43:47,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:43:49,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:43:49,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707688772] [2024-09-21 11:43:49,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:43:49,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958263223] [2024-09-21 11:43:49,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958263223] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:43:49,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:43:49,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-21 11:43:49,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506636326] [2024-09-21 11:43:49,404 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 11:43:49,404 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-21 11:43:49,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:43:49,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-21 11:43:49,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-09-21 11:43:49,405 INFO L87 Difference]: Start difference. First operand 1695 states and 2662 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2024-09-21 11:43:54,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:43:54,880 INFO L93 Difference]: Finished difference Result 2006 states and 3144 transitions. [2024-09-21 11:43:54,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-21 11:43:54,880 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 126 [2024-09-21 11:43:54,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:43:54,888 INFO L225 Difference]: With dead ends: 2006 [2024-09-21 11:43:54,888 INFO L226 Difference]: Without dead ends: 2003 [2024-09-21 11:43:54,889 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2024-09-21 11:43:54,890 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 64 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:43:54,890 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 666 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-21 11:43:54,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2024-09-21 11:43:58,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1874. [2024-09-21 11:43:58,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1874 states, 943 states have (on average 1.2916224814422057) internal successors, (1218), 948 states have internal predecessors, (1218), 861 states have call successors, (861), 70 states have call predecessors, (861), 69 states have return successors, (859), 855 states have call predecessors, (859), 859 states have call successors, (859) [2024-09-21 11:43:58,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 2938 transitions. [2024-09-21 11:43:58,622 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 2938 transitions. Word has length 126 [2024-09-21 11:43:58,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:43:58,623 INFO L474 AbstractCegarLoop]: Abstraction has 1874 states and 2938 transitions. [2024-09-21 11:43:58,623 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2024-09-21 11:43:58,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:58,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 2938 transitions. [2024-09-21 11:43:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-09-21 11:43:58,632 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:43:58,632 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:43:58,638 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-21 11:43:58,832 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-21 11:43:58,833 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:43:58,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:43:58,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1887231395, now seen corresponding path program 3 times [2024-09-21 11:43:58,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:43:58,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114638304] [2024-09-21 11:43:58,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:43:58,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:43:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:43:58,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191974389] [2024-09-21 11:43:58,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:43:58,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:43:58,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:43:58,856 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:43:58,860 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-21 11:43:58,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-21 11:43:58,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:43:58,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-21 11:43:58,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:44:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 106 proven. 65 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2024-09-21 11:44:00,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:44:03,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:44:03,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114638304] [2024-09-21 11:44:03,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:44:03,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191974389] [2024-09-21 11:44:03,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191974389] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:44:03,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:44:03,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-21 11:44:03,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764151502] [2024-09-21 11:44:03,686 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 11:44:03,686 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-21 11:44:03,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:44:03,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-21 11:44:03,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2024-09-21 11:44:03,686 INFO L87 Difference]: Start difference. First operand 1874 states and 2938 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-21 11:44:08,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:44:08,097 INFO L93 Difference]: Finished difference Result 2059 states and 3224 transitions. [2024-09-21 11:44:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-21 11:44:08,098 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 129 [2024-09-21 11:44:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:44:08,109 INFO L225 Difference]: With dead ends: 2059 [2024-09-21 11:44:08,112 INFO L226 Difference]: Without dead ends: 2057 [2024-09-21 11:44:08,113 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2024-09-21 11:44:08,114 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 37 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-21 11:44:08,114 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 382 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-21 11:44:08,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2024-09-21 11:44:11,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 2012. [2024-09-21 11:44:11,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2012 states, 1013 states have (on average 1.293188548864758) internal successors, (1310), 1018 states have internal predecessors, (1310), 925 states have call successors, (925), 74 states have call predecessors, (925), 73 states have return successors, (923), 919 states have call predecessors, (923), 923 states have call successors, (923) [2024-09-21 11:44:11,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 3158 transitions. [2024-09-21 11:44:11,748 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 3158 transitions. Word has length 129 [2024-09-21 11:44:11,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:44:11,749 INFO L474 AbstractCegarLoop]: Abstraction has 2012 states and 3158 transitions. [2024-09-21 11:44:11,749 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-21 11:44:11,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:44:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 3158 transitions. [2024-09-21 11:44:11,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-09-21 11:44:11,751 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:44:11,751 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:44:11,766 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-21 11:44:11,955 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-21 11:44:11,956 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:44:11,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:44:11,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1329164778, now seen corresponding path program 7 times [2024-09-21 11:44:11,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:44:11,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070493519] [2024-09-21 11:44:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:44:11,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:44:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:44:11,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693328455] [2024-09-21 11:44:11,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-21 11:44:11,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:44:11,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:44:11,973 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:44:11,978 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-21 11:44:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:44:12,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-09-21 11:44:12,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:44:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 70 proven. 76 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2024-09-21 11:44:13,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:44:14,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:44:14,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070493519] [2024-09-21 11:44:14,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:44:14,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693328455] [2024-09-21 11:44:14,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693328455] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:44:14,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 11:44:14,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-21 11:44:14,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309663012] [2024-09-21 11:44:14,653 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 11:44:14,653 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-21 11:44:14,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:44:14,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-21 11:44:14,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2024-09-21 11:44:14,654 INFO L87 Difference]: Start difference. First operand 2012 states and 3158 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-21 11:44:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:44:19,935 INFO L93 Difference]: Finished difference Result 2146 states and 3364 transitions. [2024-09-21 11:44:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-21 11:44:19,939 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 129 [2024-09-21 11:44:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:44:19,951 INFO L225 Difference]: With dead ends: 2146 [2024-09-21 11:44:19,951 INFO L226 Difference]: Without dead ends: 2139 [2024-09-21 11:44:19,952 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2024-09-21 11:44:19,953 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 89 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-21 11:44:19,953 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 663 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-21 11:44:19,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2024-09-21 11:44:23,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2124. [2024-09-21 11:44:23,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 1067 states have (on average 1.295220243673852) internal successors, (1382), 1072 states have internal predecessors, (1382), 981 states have call successors, (981), 76 states have call predecessors, (981), 75 states have return successors, (979), 975 states have call predecessors, (979), 979 states have call successors, (979) [2024-09-21 11:44:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 3342 transitions. [2024-09-21 11:44:23,865 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 3342 transitions. Word has length 129 [2024-09-21 11:44:23,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:44:23,865 INFO L474 AbstractCegarLoop]: Abstraction has 2124 states and 3342 transitions. [2024-09-21 11:44:23,866 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-21 11:44:23,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:44:23,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 3342 transitions. [2024-09-21 11:44:23,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-09-21 11:44:23,868 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:44:23,868 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:44:23,881 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-21 11:44:24,072 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:44:24,073 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:44:24,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:44:24,073 INFO L85 PathProgramCache]: Analyzing trace with hash 979073460, now seen corresponding path program 4 times [2024-09-21 11:44:24,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:44:24,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045658188] [2024-09-21 11:44:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:44:24,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:44:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 11:44:24,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527657512] [2024-09-21 11:44:24,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 11:44:24,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:44:24,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:44:24,091 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:44:24,092 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-21 11:44:24,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 11:44:24,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:44:24,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-21 11:44:24,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:44:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 48 proven. 125 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2024-09-21 11:44:25,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:44:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 63 proven. 107 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2024-09-21 11:44:31,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:44:31,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045658188] [2024-09-21 11:44:31,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 11:44:31,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527657512] [2024-09-21 11:44:31,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527657512] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:44:31,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:44:31,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2024-09-21 11:44:31,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847848490] [2024-09-21 11:44:31,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:44:31,679 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-21 11:44:31,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:44:31,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-21 11:44:31,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2024-09-21 11:44:31,680 INFO L87 Difference]: Start difference. First operand 2124 states and 3342 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 37 states have internal predecessors, (87), 13 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (39), 13 states have call predecessors, (39), 13 states have call successors, (39) [2024-09-21 11:44:36,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-21 11:44:53,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-21 11:44:55,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []