./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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/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 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 15:41:40,177 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 15:41:40,238 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 15:41:40,242 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 15:41:40,244 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 15:41:40,268 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 15:41:40,269 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 15:41:40,269 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 15:41:40,270 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 15:41:40,273 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 15:41:40,273 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 15:41:40,273 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 15:41:40,273 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 15:41:40,274 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 15:41:40,274 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 15:41:40,274 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 15:41:40,274 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 15:41:40,275 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 15:41:40,275 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 15:41:40,276 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 15:41:40,276 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 15:41:40,276 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 15:41:40,276 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 15:41:40,277 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 15:41:40,277 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 15:41:40,277 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 15:41:40,278 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 15:41:40,278 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 15:41:40,278 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 15:41:40,278 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 15:41:40,278 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 15:41:40,279 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 15:41:40,279 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:41:40,280 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 15:41:40,280 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 15:41:40,280 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 15:41:40,280 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 15:41:40,281 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 15:41:40,281 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 15:41:40,281 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 15:41:40,281 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 15:41:40,281 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 15:41:40,282 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 15:41:40,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 15:41:40,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 15:41:40,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 15:41:40,563 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 15:41:40,563 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 15:41:40,564 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2024-09-12 15:41:41,779 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 15:41:41,908 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 15:41:41,908 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2024-09-12 15:41:41,916 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/59dd92203/d1a7b1b429114020ad3b268ddfb49d3a/FLAG60ce675fe [2024-09-12 15:41:41,926 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/59dd92203/d1a7b1b429114020ad3b268ddfb49d3a [2024-09-12 15:41:41,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 15:41:41,928 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 15:41:41,929 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 15:41:41,929 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 15:41:41,933 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 15:41:41,933 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:41:41" (1/1) ... [2024-09-12 15:41:41,934 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45fab81f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:41:41, skipping insertion in model container [2024-09-12 15:41:41,934 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:41:41" (1/1) ... [2024-09-12 15:41:41,947 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 15:41:42,065 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2024-09-12 15:41:42,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:41:42,099 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 15:41:42,111 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/egcd3-ll.c[490,503] [2024-09-12 15:41:42,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:41:42,127 INFO L204 MainTranslator]: Completed translation [2024-09-12 15:41:42,128 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:41:42 WrapperNode [2024-09-12 15:41:42,128 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 15:41:42,129 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 15:41:42,129 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 15:41:42,129 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 15:41:42,134 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:41:42" (1/1) ... [2024-09-12 15:41:42,138 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:41:42" (1/1) ... [2024-09-12 15:41:42,143 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 15:41:42,144 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 15:41:42,145 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 15:41:42,145 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 15:41:42,145 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 15:41:42,152 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:41:42" (1/1) ... [2024-09-12 15:41:42,152 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:41:42" (1/1) ... [2024-09-12 15:41:42,153 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:41:42" (1/1) ... [2024-09-12 15:41:42,171 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]. [2024-09-12 15:41:42,172 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:41:42" (1/1) ... [2024-09-12 15:41:42,172 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:41:42" (1/1) ... [2024-09-12 15:41:42,178 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:41:42" (1/1) ... [2024-09-12 15:41:42,181 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:41:42" (1/1) ... [2024-09-12 15:41:42,182 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:41:42" (1/1) ... [2024-09-12 15:41:42,183 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:41:42" (1/1) ... [2024-09-12 15:41:42,183 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 15:41:42,184 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 15:41:42,184 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 15:41:42,184 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 15:41:42,185 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:41:42" (1/1) ... [2024-09-12 15:41:42,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:41:42,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:42,214 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) [2024-09-12 15:41:42,216 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 [2024-09-12 15:41:42,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 15:41:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 15:41:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 15:41:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 15:41:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 15:41:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 15:41:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 15:41:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 15:41:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 15:41:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 15:41:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 15:41:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 15:41:42,302 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 15:41:42,304 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 15:41:42,462 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-12 15:41:42,462 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 15:41:42,478 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 15:41:42,480 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-12 15:41:42,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:41:42 BoogieIcfgContainer [2024-09-12 15:41:42,480 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 15:41:42,483 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 15:41:42,484 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 15:41:42,486 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 15:41:42,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 03:41:41" (1/3) ... [2024-09-12 15:41:42,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6999e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:41:42, skipping insertion in model container [2024-09-12 15:41:42,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:41:42" (2/3) ... [2024-09-12 15:41:42,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6999e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:41:42, skipping insertion in model container [2024-09-12 15:41:42,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:41:42" (3/3) ... [2024-09-12 15:41:42,489 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2024-09-12 15:41:42,502 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 15:41:42,502 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 15:41:42,558 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 15:41:42,564 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;@25870720, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 15:41:42,565 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 15:41:42,567 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) [2024-09-12 15:41:42,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-12 15:41:42,573 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:42,574 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:41:42,574 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:42,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:42,579 INFO L85 PathProgramCache]: Analyzing trace with hash 48210315, now seen corresponding path program 1 times [2024-09-12 15:41:42,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:42,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466239166] [2024-09-12 15:41:42,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:42,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:42,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:42,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:41:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:42,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 15:41:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:41:42,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:42,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466239166] [2024-09-12 15:41:42,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466239166] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:41:42,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:41:42,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 15:41:42,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667077309] [2024-09-12 15:41:42,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:41:42,717 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 15:41:42,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:42,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 15:41:42,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 15:41:42,734 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) [2024-09-12 15:41:42,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:42,761 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2024-09-12 15:41:42,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 15:41:42,764 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 [2024-09-12 15:41:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:42,769 INFO L225 Difference]: With dead ends: 64 [2024-09-12 15:41:42,769 INFO L226 Difference]: Without dead ends: 31 [2024-09-12 15:41:42,771 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 [2024-09-12 15:41:42,773 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 [2024-09-12 15:41:42,774 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] [2024-09-12 15:41:42,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-12 15:41:42,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-12 15:41:42,800 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) [2024-09-12 15:41:42,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2024-09-12 15:41:42,803 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 21 [2024-09-12 15:41:42,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:42,803 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2024-09-12 15:41:42,803 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) [2024-09-12 15:41:42,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:42,804 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2024-09-12 15:41:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 15:41:42,805 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:42,805 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:41:42,805 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 15:41:42,806 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:42,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:42,806 INFO L85 PathProgramCache]: Analyzing trace with hash -190498723, now seen corresponding path program 1 times [2024-09-12 15:41:42,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:42,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378365041] [2024-09-12 15:41:42,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:42,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:43,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:43,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:41:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:43,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 15:41:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 15:41:43,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:43,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378365041] [2024-09-12 15:41:43,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378365041] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:41:43,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:41:43,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-12 15:41:43,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498953636] [2024-09-12 15:41:43,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:41:43,078 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 15:41:43,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:43,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 15:41:43,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-12 15:41:43,079 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) [2024-09-12 15:41:43,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:43,196 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2024-09-12 15:41:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 15:41:43,197 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 [2024-09-12 15:41:43,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:43,198 INFO L225 Difference]: With dead ends: 50 [2024-09-12 15:41:43,198 INFO L226 Difference]: Without dead ends: 43 [2024-09-12 15:41:43,199 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 [2024-09-12 15:41:43,201 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 [2024-09-12 15:41:43,201 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] [2024-09-12 15:41:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-12 15:41:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2024-09-12 15:41:43,214 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) [2024-09-12 15:41:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-09-12 15:41:43,216 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2024-09-12 15:41:43,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:43,217 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-09-12 15:41:43,217 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) [2024-09-12 15:41:43,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:43,218 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-09-12 15:41:43,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-12 15:41:43,219 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:43,219 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] [2024-09-12 15:41:43,219 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 15:41:43,219 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:43,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:43,220 INFO L85 PathProgramCache]: Analyzing trace with hash -832406041, now seen corresponding path program 1 times [2024-09-12 15:41:43,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:43,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239341257] [2024-09-12 15:41:43,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:43,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:41:43,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533798700] [2024-09-12 15:41:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:43,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:43,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:43,237 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) [2024-09-12 15:41:43,238 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 15:41:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:43,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 15:41:43,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:41:43,391 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:41:43,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:43,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239341257] [2024-09-12 15:41:43,392 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:41:43,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533798700] [2024-09-12 15:41:43,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533798700] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:41:43,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:41:43,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:41:43,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515060550] [2024-09-12 15:41:43,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:41:43,393 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:41:43,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:43,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:41:43,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:41:43,394 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) [2024-09-12 15:41:43,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:43,449 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2024-09-12 15:41:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:41:43,449 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 [2024-09-12 15:41:43,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:43,450 INFO L225 Difference]: With dead ends: 49 [2024-09-12 15:41:43,451 INFO L226 Difference]: Without dead ends: 47 [2024-09-12 15:41:43,452 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 [2024-09-12 15:41:43,453 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 [2024-09-12 15:41:43,454 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] [2024-09-12 15:41:43,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-12 15:41:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-12 15:41:43,463 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) [2024-09-12 15:41:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-09-12 15:41:43,466 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 25 [2024-09-12 15:41:43,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:43,466 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-09-12 15:41:43,467 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) [2024-09-12 15:41:43,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-09-12 15:41:43,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 15:41:43,469 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:43,469 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] [2024-09-12 15:41:43,481 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 15:41:43,673 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 [2024-09-12 15:41:43,674 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:43,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:43,675 INFO L85 PathProgramCache]: Analyzing trace with hash -143490539, now seen corresponding path program 1 times [2024-09-12 15:41:43,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:43,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744874823] [2024-09-12 15:41:43,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:43,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:43,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:43,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:41:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:43,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 15:41:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 15:41:43,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:43,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744874823] [2024-09-12 15:41:43,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744874823] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:43,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363597954] [2024-09-12 15:41:43,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:43,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:43,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:43,844 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) [2024-09-12 15:41:43,846 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 15:41:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:43,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 15:41:43,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 15:41:43,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 15:41:44,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363597954] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:44,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:44,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-12 15:41:44,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859930968] [2024-09-12 15:41:44,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:44,003 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 15:41:44,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:44,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 15:41:44,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-12 15:41:44,004 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) [2024-09-12 15:41:44,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:44,181 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2024-09-12 15:41:44,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 15:41:44,181 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 [2024-09-12 15:41:44,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:44,183 INFO L225 Difference]: With dead ends: 99 [2024-09-12 15:41:44,184 INFO L226 Difference]: Without dead ends: 92 [2024-09-12 15:41:44,185 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 [2024-09-12 15:41:44,185 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 [2024-09-12 15:41:44,186 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] [2024-09-12 15:41:44,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-12 15:41:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2024-09-12 15:41:44,201 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) [2024-09-12 15:41:44,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2024-09-12 15:41:44,203 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 27 [2024-09-12 15:41:44,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:44,203 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2024-09-12 15:41:44,203 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) [2024-09-12 15:41:44,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:44,205 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2024-09-12 15:41:44,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-12 15:41:44,206 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:44,206 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] [2024-09-12 15:41:44,219 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-12 15:41:44,406 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 [2024-09-12 15:41:44,407 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:44,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:44,408 INFO L85 PathProgramCache]: Analyzing trace with hash -849404633, now seen corresponding path program 1 times [2024-09-12 15:41:44,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:44,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333756043] [2024-09-12 15:41:44,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:44,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:41:44,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962127422] [2024-09-12 15:41:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:44,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:44,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:44,419 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) [2024-09-12 15:41:44,420 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 15:41:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:44,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 15:41:44,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:41:44,520 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:41:44,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:44,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333756043] [2024-09-12 15:41:44,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:41:44,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962127422] [2024-09-12 15:41:44,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962127422] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:41:44,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:41:44,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:41:44,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107342703] [2024-09-12 15:41:44,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:41:44,521 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:41:44,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:44,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:41:44,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:41:44,522 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) [2024-09-12 15:41:44,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:44,569 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2024-09-12 15:41:44,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:41:44,569 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 [2024-09-12 15:41:44,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:44,570 INFO L225 Difference]: With dead ends: 75 [2024-09-12 15:41:44,571 INFO L226 Difference]: Without dead ends: 73 [2024-09-12 15:41:44,571 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 [2024-09-12 15:41:44,571 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 [2024-09-12 15:41:44,572 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] [2024-09-12 15:41:44,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-12 15:41:44,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2024-09-12 15:41:44,582 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) [2024-09-12 15:41:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2024-09-12 15:41:44,582 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 30 [2024-09-12 15:41:44,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:44,583 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2024-09-12 15:41:44,583 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) [2024-09-12 15:41:44,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:44,583 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2024-09-12 15:41:44,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-12 15:41:44,584 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:44,584 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] [2024-09-12 15:41:44,595 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 15:41:44,784 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 [2024-09-12 15:41:44,785 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:44,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:44,785 INFO L85 PathProgramCache]: Analyzing trace with hash -570934993, now seen corresponding path program 1 times [2024-09-12 15:41:44,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:44,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525214618] [2024-09-12 15:41:44,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:44,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:41:44,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928709786] [2024-09-12 15:41:44,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:44,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:44,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:44,796 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) [2024-09-12 15:41:44,797 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 15:41:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:44,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-12 15:41:44,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:41:44,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:41:45,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:45,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525214618] [2024-09-12 15:41:45,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:41:45,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928709786] [2024-09-12 15:41:45,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928709786] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:45,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:41:45,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2024-09-12 15:41:45,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239579456] [2024-09-12 15:41:45,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:45,016 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 15:41:45,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:45,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 15:41:45,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-09-12 15:41:45,018 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) [2024-09-12 15:41:45,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:45,172 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2024-09-12 15:41:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 15:41:45,173 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 [2024-09-12 15:41:45,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:45,175 INFO L225 Difference]: With dead ends: 107 [2024-09-12 15:41:45,176 INFO L226 Difference]: Without dead ends: 105 [2024-09-12 15:41:45,176 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 [2024-09-12 15:41:45,177 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 [2024-09-12 15:41:45,177 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] [2024-09-12 15:41:45,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-09-12 15:41:45,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2024-09-12 15:41:45,208 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) [2024-09-12 15:41:45,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2024-09-12 15:41:45,211 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 30 [2024-09-12 15:41:45,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:45,211 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2024-09-12 15:41:45,212 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) [2024-09-12 15:41:45,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:45,212 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2024-09-12 15:41:45,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-12 15:41:45,213 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:45,213 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] [2024-09-12 15:41:45,226 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 15:41:45,413 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 [2024-09-12 15:41:45,413 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:45,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:45,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1950278233, now seen corresponding path program 1 times [2024-09-12 15:41:45,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:45,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273222046] [2024-09-12 15:41:45,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:45,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:41:45,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495815674] [2024-09-12 15:41:45,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:45,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:45,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:45,424 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) [2024-09-12 15:41:45,425 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 15:41:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:45,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 15:41:45,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 15:41:45,493 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:41:45,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:45,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273222046] [2024-09-12 15:41:45,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:41:45,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495815674] [2024-09-12 15:41:45,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495815674] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:41:45,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:41:45,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:41:45,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854728883] [2024-09-12 15:41:45,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:41:45,494 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:41:45,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:45,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:41:45,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:41:45,495 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) [2024-09-12 15:41:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:45,557 INFO L93 Difference]: Finished difference Result 147 states and 207 transitions. [2024-09-12 15:41:45,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:41:45,558 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 [2024-09-12 15:41:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:45,559 INFO L225 Difference]: With dead ends: 147 [2024-09-12 15:41:45,559 INFO L226 Difference]: Without dead ends: 145 [2024-09-12 15:41:45,559 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 [2024-09-12 15:41:45,560 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 [2024-09-12 15:41:45,560 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] [2024-09-12 15:41:45,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-12 15:41:45,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2024-09-12 15:41:45,594 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) [2024-09-12 15:41:45,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 199 transitions. [2024-09-12 15:41:45,596 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 199 transitions. Word has length 35 [2024-09-12 15:41:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:45,596 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 199 transitions. [2024-09-12 15:41:45,596 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) [2024-09-12 15:41:45,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 199 transitions. [2024-09-12 15:41:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-12 15:41:45,598 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:45,598 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] [2024-09-12 15:41:45,612 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 15:41:45,798 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 [2024-09-12 15:41:45,799 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:45,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:45,800 INFO L85 PathProgramCache]: Analyzing trace with hash -939315489, now seen corresponding path program 1 times [2024-09-12 15:41:45,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:45,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909934768] [2024-09-12 15:41:45,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:45,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:41:45,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556152046] [2024-09-12 15:41:45,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:45,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:45,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:45,817 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) [2024-09-12 15:41:45,818 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 15:41:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:45,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-12 15:41:45,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:41:45,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:46,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:46,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909934768] [2024-09-12 15:41:46,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:41:46,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556152046] [2024-09-12 15:41:46,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556152046] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:46,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:41:46,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-12 15:41:46,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908248984] [2024-09-12 15:41:46,007 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:46,007 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 15:41:46,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:46,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 15:41:46,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-12 15:41:46,008 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) [2024-09-12 15:41:46,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:46,133 INFO L93 Difference]: Finished difference Result 152 states and 210 transitions. [2024-09-12 15:41:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 15:41:46,133 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 [2024-09-12 15:41:46,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:46,137 INFO L225 Difference]: With dead ends: 152 [2024-09-12 15:41:46,137 INFO L226 Difference]: Without dead ends: 150 [2024-09-12 15:41:46,137 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 [2024-09-12 15:41:46,138 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 [2024-09-12 15:41:46,138 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] [2024-09-12 15:41:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-12 15:41:46,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2024-09-12 15:41:46,158 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) [2024-09-12 15:41:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 205 transitions. [2024-09-12 15:41:46,159 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 205 transitions. Word has length 35 [2024-09-12 15:41:46,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:46,160 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 205 transitions. [2024-09-12 15:41:46,160 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) [2024-09-12 15:41:46,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:46,160 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 205 transitions. [2024-09-12 15:41:46,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-12 15:41:46,161 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:46,161 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] [2024-09-12 15:41:46,173 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-12 15:41:46,362 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 [2024-09-12 15:41:46,363 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:46,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:46,363 INFO L85 PathProgramCache]: Analyzing trace with hash -660845849, now seen corresponding path program 2 times [2024-09-12 15:41:46,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:46,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281734844] [2024-09-12 15:41:46,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:46,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:46,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:46,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:41:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:46,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 15:41:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:41:46,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:46,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281734844] [2024-09-12 15:41:46,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281734844] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:41:46,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:41:46,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:41:46,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211505104] [2024-09-12 15:41:46,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:41:46,421 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:41:46,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:46,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:41:46,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:41:46,421 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) [2024-09-12 15:41:46,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:46,503 INFO L93 Difference]: Finished difference Result 186 states and 257 transitions. [2024-09-12 15:41:46,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 15:41:46,503 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 [2024-09-12 15:41:46,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:46,504 INFO L225 Difference]: With dead ends: 186 [2024-09-12 15:41:46,504 INFO L226 Difference]: Without dead ends: 130 [2024-09-12 15:41:46,505 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 [2024-09-12 15:41:46,505 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:46,506 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 148 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:41:46,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-12 15:41:46,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2024-09-12 15:41:46,522 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) [2024-09-12 15:41:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 163 transitions. [2024-09-12 15:41:46,523 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 163 transitions. Word has length 35 [2024-09-12 15:41:46,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:46,524 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 163 transitions. [2024-09-12 15:41:46,524 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) [2024-09-12 15:41:46,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:46,524 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 163 transitions. [2024-09-12 15:41:46,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 15:41:46,524 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:46,525 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] [2024-09-12 15:41:46,525 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-12 15:41:46,525 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:46,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:46,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1428718823, now seen corresponding path program 1 times [2024-09-12 15:41:46,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:46,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850362922] [2024-09-12 15:41:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:46,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:41:46,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751051074] [2024-09-12 15:41:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:46,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:46,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:46,538 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) [2024-09-12 15:41:46,540 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 15:41:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:46,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 15:41:46,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 15:41:46,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:41:46,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:46,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850362922] [2024-09-12 15:41:46,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:41:46,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751051074] [2024-09-12 15:41:46,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751051074] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:41:46,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:41:46,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:41:46,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606725515] [2024-09-12 15:41:46,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:41:46,608 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:41:46,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:46,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:41:46,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:41:46,609 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) [2024-09-12 15:41:46,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:46,671 INFO L93 Difference]: Finished difference Result 180 states and 260 transitions. [2024-09-12 15:41:46,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:41:46,672 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 [2024-09-12 15:41:46,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:46,673 INFO L225 Difference]: With dead ends: 180 [2024-09-12 15:41:46,673 INFO L226 Difference]: Without dead ends: 178 [2024-09-12 15:41:46,673 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 [2024-09-12 15:41:46,674 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 [2024-09-12 15:41:46,674 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] [2024-09-12 15:41:46,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-09-12 15:41:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 166. [2024-09-12 15:41:46,704 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) [2024-09-12 15:41:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 238 transitions. [2024-09-12 15:41:46,705 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 238 transitions. Word has length 40 [2024-09-12 15:41:46,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:46,705 INFO L474 AbstractCegarLoop]: Abstraction has 166 states and 238 transitions. [2024-09-12 15:41:46,706 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) [2024-09-12 15:41:46,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:46,706 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 238 transitions. [2024-09-12 15:41:46,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-12 15:41:46,707 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:46,707 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] [2024-09-12 15:41:46,720 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-12 15:41:46,907 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 [2024-09-12 15:41:46,908 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:46,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:46,908 INFO L85 PathProgramCache]: Analyzing trace with hash -262492089, now seen corresponding path program 1 times [2024-09-12 15:41:46,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:46,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699156684] [2024-09-12 15:41:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:46,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:41:46,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976587564] [2024-09-12 15:41:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:46,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:46,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:46,921 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) [2024-09-12 15:41:46,923 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 15:41:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:46,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-12 15:41:46,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-12 15:41:47,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-12 15:41:48,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:48,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699156684] [2024-09-12 15:41:48,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:41:48,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976587564] [2024-09-12 15:41:48,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976587564] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:48,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:41:48,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-12 15:41:48,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793594432] [2024-09-12 15:41:48,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:48,644 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 15:41:48,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:48,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 15:41:48,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-09-12 15:41:48,645 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) [2024-09-12 15:41:51,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:51,834 INFO L93 Difference]: Finished difference Result 445 states and 663 transitions. [2024-09-12 15:41:51,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-12 15:41:51,835 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 [2024-09-12 15:41:51,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:51,838 INFO L225 Difference]: With dead ends: 445 [2024-09-12 15:41:51,840 INFO L226 Difference]: Without dead ends: 342 [2024-09-12 15:41:51,841 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 15:41:51,842 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 170 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.7s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:51,842 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 408 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-12 15:41:51,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-09-12 15:41:51,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 256. [2024-09-12 15:41:51,941 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) [2024-09-12 15:41:51,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 364 transitions. [2024-09-12 15:41:51,943 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 364 transitions. Word has length 52 [2024-09-12 15:41:51,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:51,943 INFO L474 AbstractCegarLoop]: Abstraction has 256 states and 364 transitions. [2024-09-12 15:41:51,944 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) [2024-09-12 15:41:51,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:51,944 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 364 transitions. [2024-09-12 15:41:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-12 15:41:51,944 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:51,945 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] [2024-09-12 15:41:51,957 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-12 15:41:52,145 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 [2024-09-12 15:41:52,145 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:52,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:52,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1924337224, now seen corresponding path program 1 times [2024-09-12 15:41:52,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:52,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662862164] [2024-09-12 15:41:52,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:52,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:41:52,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738254840] [2024-09-12 15:41:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:52,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:52,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:52,156 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) [2024-09-12 15:41:52,157 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 15:41:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:52,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 15:41:52,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-09-12 15:41:52,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-12 15:41:52,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:52,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662862164] [2024-09-12 15:41:52,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:41:52,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738254840] [2024-09-12 15:41:52,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738254840] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:52,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:41:52,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-12 15:41:52,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781613625] [2024-09-12 15:41:52,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:41:52,303 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:41:52,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:52,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:41:52,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-12 15:41:52,303 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) [2024-09-12 15:41:52,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:52,423 INFO L93 Difference]: Finished difference Result 262 states and 369 transitions. [2024-09-12 15:41:52,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:41:52,424 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 [2024-09-12 15:41:52,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:52,425 INFO L225 Difference]: With dead ends: 262 [2024-09-12 15:41:52,425 INFO L226 Difference]: Without dead ends: 260 [2024-09-12 15:41:52,426 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 [2024-09-12 15:41:52,426 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 [2024-09-12 15:41:52,426 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] [2024-09-12 15:41:52,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-09-12 15:41:52,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2024-09-12 15:41:52,511 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) [2024-09-12 15:41:52,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 367 transitions. [2024-09-12 15:41:52,512 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 367 transitions. Word has length 62 [2024-09-12 15:41:52,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:52,513 INFO L474 AbstractCegarLoop]: Abstraction has 260 states and 367 transitions. [2024-09-12 15:41:52,513 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) [2024-09-12 15:41:52,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:52,513 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 367 transitions. [2024-09-12 15:41:52,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 15:41:52,514 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:52,514 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] [2024-09-12 15:41:52,525 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-12 15:41:52,717 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 [2024-09-12 15:41:52,717 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:52,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:52,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1180380411, now seen corresponding path program 1 times [2024-09-12 15:41:52,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:52,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814199588] [2024-09-12 15:41:52,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:52,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:41:52,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132141065] [2024-09-12 15:41:52,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:52,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:52,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:52,729 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) [2024-09-12 15:41:52,733 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 15:41:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:52,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-12 15:41:52,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-12 15:41:53,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:53,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:53,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814199588] [2024-09-12 15:41:53,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:41:53,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132141065] [2024-09-12 15:41:53,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132141065] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:53,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:41:53,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-12 15:41:53,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43279896] [2024-09-12 15:41:53,204 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:53,205 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 15:41:53,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:53,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 15:41:53,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-09-12 15:41:53,205 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) [2024-09-12 15:41:53,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:53,722 INFO L93 Difference]: Finished difference Result 318 states and 454 transitions. [2024-09-12 15:41:53,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 15:41:53,722 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 [2024-09-12 15:41:53,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:53,724 INFO L225 Difference]: With dead ends: 318 [2024-09-12 15:41:53,724 INFO L226 Difference]: Without dead ends: 316 [2024-09-12 15:41:53,725 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 [2024-09-12 15:41:53,725 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 83 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2024-09-12 15:41:53,725 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] [2024-09-12 15:41:53,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-12 15:41:53,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 311. [2024-09-12 15:41:53,825 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) [2024-09-12 15:41:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 447 transitions. [2024-09-12 15:41:53,827 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 447 transitions. Word has length 60 [2024-09-12 15:41:53,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:53,828 INFO L474 AbstractCegarLoop]: Abstraction has 311 states and 447 transitions. [2024-09-12 15:41:53,828 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) [2024-09-12 15:41:53,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 447 transitions. [2024-09-12 15:41:53,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-12 15:41:53,830 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:53,830 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] [2024-09-12 15:41:53,842 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-12 15:41:54,030 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 [2024-09-12 15:41:54,030 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:54,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:54,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1640416879, now seen corresponding path program 2 times [2024-09-12 15:41:54,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:54,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904350481] [2024-09-12 15:41:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:54,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:54,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:54,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:41:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:54,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 15:41:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:54,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:41:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:54,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:41:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:54,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 15:41:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:54,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:41:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:54,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-12 15:41:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:54,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-12 15:41:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-09-12 15:41:54,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:54,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904350481] [2024-09-12 15:41:54,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904350481] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:41:54,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:41:54,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:41:54,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399462732] [2024-09-12 15:41:54,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:41:54,101 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:41:54,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:54,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:41:54,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:41:54,102 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) [2024-09-12 15:41:54,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:54,249 INFO L93 Difference]: Finished difference Result 534 states and 771 transitions. [2024-09-12 15:41:54,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:41:54,250 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 [2024-09-12 15:41:54,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:54,252 INFO L225 Difference]: With dead ends: 534 [2024-09-12 15:41:54,252 INFO L226 Difference]: Without dead ends: 320 [2024-09-12 15:41:54,252 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 [2024-09-12 15:41:54,253 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 [2024-09-12 15:41:54,253 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] [2024-09-12 15:41:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-09-12 15:41:54,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 308. [2024-09-12 15:41:54,361 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) [2024-09-12 15:41:54,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 437 transitions. [2024-09-12 15:41:54,364 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 437 transitions. Word has length 65 [2024-09-12 15:41:54,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:54,365 INFO L474 AbstractCegarLoop]: Abstraction has 308 states and 437 transitions. [2024-09-12 15:41:54,365 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) [2024-09-12 15:41:54,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:54,365 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 437 transitions. [2024-09-12 15:41:54,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-12 15:41:54,366 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:54,366 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] [2024-09-12 15:41:54,366 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-09-12 15:41:54,366 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:54,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:54,367 INFO L85 PathProgramCache]: Analyzing trace with hash -629454135, now seen corresponding path program 3 times [2024-09-12 15:41:54,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:54,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184149454] [2024-09-12 15:41:54,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:54,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:41:54,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515793836] [2024-09-12 15:41:54,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:41:54,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:54,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:54,382 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) [2024-09-12 15:41:54,384 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 15:41:54,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 15:41:54,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:54,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-12 15:41:54,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:55,099 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-12 15:41:55,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:59,194 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 [2024-09-12 15:41:59,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:59,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184149454] [2024-09-12 15:41:59,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:41:59,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515793836] [2024-09-12 15:41:59,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515793836] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:59,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:41:59,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-12 15:41:59,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317975112] [2024-09-12 15:41:59,881 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:59,881 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-12 15:41:59,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:59,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-12 15:41:59,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=462, Unknown=1, NotChecked=44, Total=600 [2024-09-12 15:41:59,882 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) [2024-09-12 15:42:00,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:42:00,533 INFO L93 Difference]: Finished difference Result 336 states and 461 transitions. [2024-09-12 15:42:00,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 15:42:00,534 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 [2024-09-12 15:42:00,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:42:00,536 INFO L225 Difference]: With dead ends: 336 [2024-09-12 15:42:00,536 INFO L226 Difference]: Without dead ends: 334 [2024-09-12 15:42:00,537 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=155, Invalid=778, Unknown=1, NotChecked=58, Total=992 [2024-09-12 15:42:00,537 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 [2024-09-12 15:42:00,537 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] [2024-09-12 15:42:00,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2024-09-12 15:42:00,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 324. [2024-09-12 15:42:00,655 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) [2024-09-12 15:42:00,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 449 transitions. [2024-09-12 15:42:00,656 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 449 transitions. Word has length 65 [2024-09-12 15:42:00,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:42:00,657 INFO L474 AbstractCegarLoop]: Abstraction has 324 states and 449 transitions. [2024-09-12 15:42:00,657 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) [2024-09-12 15:42:00,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:00,657 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 449 transitions. [2024-09-12 15:42:00,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-12 15:42:00,658 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:42:00,658 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] [2024-09-12 15:42:00,670 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-12 15:42:00,858 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 [2024-09-12 15:42:00,858 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:42:00,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:00,859 INFO L85 PathProgramCache]: Analyzing trace with hash -232813088, now seen corresponding path program 1 times [2024-09-12 15:42:00,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:42:00,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736586846] [2024-09-12 15:42:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:00,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:42:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:42:00,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872036409] [2024-09-12 15:42:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:00,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:00,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:42:00,870 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) [2024-09-12 15:42:00,870 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 15:42:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:00,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-12 15:42:00,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:42:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-12 15:42:01,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:42:02,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:42:02,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736586846] [2024-09-12 15:42:02,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:42:02,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872036409] [2024-09-12 15:42:02,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872036409] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:42:02,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:42:02,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-12 15:42:02,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511477272] [2024-09-12 15:42:02,944 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:42:02,944 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 15:42:02,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:42:02,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 15:42:02,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2024-09-12 15:42:02,945 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) [2024-09-12 15:42:03,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:42:03,844 INFO L93 Difference]: Finished difference Result 400 states and 561 transitions. [2024-09-12 15:42:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 15:42:03,845 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 [2024-09-12 15:42:03,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:42:03,847 INFO L225 Difference]: With dead ends: 400 [2024-09-12 15:42:03,847 INFO L226 Difference]: Without dead ends: 397 [2024-09-12 15:42:03,847 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 15:42:03,847 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 [2024-09-12 15:42:03,848 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] [2024-09-12 15:42:03,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2024-09-12 15:42:03,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 385. [2024-09-12 15:42:03,982 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) [2024-09-12 15:42:03,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 545 transitions. [2024-09-12 15:42:03,987 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 545 transitions. Word has length 79 [2024-09-12 15:42:03,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:42:03,988 INFO L474 AbstractCegarLoop]: Abstraction has 385 states and 545 transitions. [2024-09-12 15:42:03,988 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) [2024-09-12 15:42:03,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:03,988 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 545 transitions. [2024-09-12 15:42:03,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-12 15:42:03,989 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:42:03,989 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] [2024-09-12 15:42:04,002 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-12 15:42:04,193 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 [2024-09-12 15:42:04,193 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:42:04,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:04,194 INFO L85 PathProgramCache]: Analyzing trace with hash -203814726, now seen corresponding path program 1 times [2024-09-12 15:42:04,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:42:04,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96324106] [2024-09-12 15:42:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:04,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:42:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:42:04,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468689348] [2024-09-12 15:42:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:04,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:04,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:42:04,207 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) [2024-09-12 15:42:04,209 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-12 15:42:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:04,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-12 15:42:04,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:42:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-12 15:42:04,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:42:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-09-12 15:42:04,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:42:04,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96324106] [2024-09-12 15:42:04,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:42:04,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468689348] [2024-09-12 15:42:04,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468689348] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:42:04,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:42:04,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-12 15:42:04,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780434562] [2024-09-12 15:42:04,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:42:04,839 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 15:42:04,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:42:04,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 15:42:04,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-09-12 15:42:04,840 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) [2024-09-12 15:42:06,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:42:06,166 INFO L93 Difference]: Finished difference Result 885 states and 1384 transitions. [2024-09-12 15:42:06,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 15:42:06,166 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 [2024-09-12 15:42:06,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:42:06,171 INFO L225 Difference]: With dead ends: 885 [2024-09-12 15:42:06,171 INFO L226 Difference]: Without dead ends: 883 [2024-09-12 15:42:06,172 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 15:42:06,172 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 [2024-09-12 15:42:06,172 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] [2024-09-12 15:42:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2024-09-12 15:42:06,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 829. [2024-09-12 15:42:06,571 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) [2024-09-12 15:42:06,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1328 transitions. [2024-09-12 15:42:06,575 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1328 transitions. Word has length 82 [2024-09-12 15:42:06,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:42:06,575 INFO L474 AbstractCegarLoop]: Abstraction has 829 states and 1328 transitions. [2024-09-12 15:42:06,575 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) [2024-09-12 15:42:06,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:06,576 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1328 transitions. [2024-09-12 15:42:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-12 15:42:06,577 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:42:06,577 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] [2024-09-12 15:42:06,588 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-12 15:42:06,777 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 [2024-09-12 15:42:06,777 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:42:06,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:06,778 INFO L85 PathProgramCache]: Analyzing trace with hash 807148018, now seen corresponding path program 1 times [2024-09-12 15:42:06,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:42:06,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015391803] [2024-09-12 15:42:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:06,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:42:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:42:06,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455568328] [2024-09-12 15:42:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:06,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:06,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:42:06,799 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) [2024-09-12 15:42:06,800 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-12 15:42:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:06,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-12 15:42:06,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:42:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-12 15:42:07,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:42:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2024-09-12 15:42:08,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:42:08,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015391803] [2024-09-12 15:42:08,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:42:08,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455568328] [2024-09-12 15:42:08,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455568328] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:42:08,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:42:08,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-12 15:42:08,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153277488] [2024-09-12 15:42:08,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:42:08,648 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 15:42:08,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:42:08,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 15:42:08,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-09-12 15:42:08,649 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) [2024-09-12 15:42:20,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:42:20,975 INFO L93 Difference]: Finished difference Result 1191 states and 1920 transitions. [2024-09-12 15:42:20,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-12 15:42:20,975 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 [2024-09-12 15:42:20,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:42:20,981 INFO L225 Difference]: With dead ends: 1191 [2024-09-12 15:42:20,981 INFO L226 Difference]: Without dead ends: 1189 [2024-09-12 15:42:20,982 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=711, Invalid=2828, Unknown=1, NotChecked=0, Total=3540 [2024-09-12 15:42:20,982 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 160 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s 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, 3.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:42:20,983 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 719 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-09-12 15:42:20,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2024-09-12 15:42:21,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1060. [2024-09-12 15:42:21,750 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) [2024-09-12 15:42:21,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1716 transitions. [2024-09-12 15:42:21,756 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1716 transitions. Word has length 82 [2024-09-12 15:42:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:42:21,756 INFO L474 AbstractCegarLoop]: Abstraction has 1060 states and 1716 transitions. [2024-09-12 15:42:21,756 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) [2024-09-12 15:42:21,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:21,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1716 transitions. [2024-09-12 15:42:21,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-12 15:42:21,757 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:42:21,757 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] [2024-09-12 15:42:21,770 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-12 15:42:21,958 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 [2024-09-12 15:42:21,958 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:42:21,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:21,958 INFO L85 PathProgramCache]: Analyzing trace with hash 590263059, now seen corresponding path program 4 times [2024-09-12 15:42:21,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:42:21,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242379546] [2024-09-12 15:42:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:21,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:42:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:42:21,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562418429] [2024-09-12 15:42:21,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:42:21,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:21,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:42:21,972 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) [2024-09-12 15:42:21,972 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-12 15:42:22,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:42:22,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:42:22,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 15:42:22,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:42:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-09-12 15:42:23,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:42:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-12 15:42:23,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:42:23,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242379546] [2024-09-12 15:42:23,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:42:23,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562418429] [2024-09-12 15:42:23,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562418429] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:42:23,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:42:23,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 21 [2024-09-12 15:42:23,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503605430] [2024-09-12 15:42:23,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:42:23,693 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 15:42:23,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:42:23,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 15:42:23,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2024-09-12 15:42:23,693 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) [2024-09-12 15:42:28,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:42:28,674 INFO L93 Difference]: Finished difference Result 1190 states and 1914 transitions. [2024-09-12 15:42:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 15:42:28,675 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 [2024-09-12 15:42:28,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:42:28,680 INFO L225 Difference]: With dead ends: 1190 [2024-09-12 15:42:28,680 INFO L226 Difference]: Without dead ends: 1188 [2024-09-12 15:42:28,681 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 15:42:28,682 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 80 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:42:28,682 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 584 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-12 15:42:28,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2024-09-12 15:42:29,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1080. [2024-09-12 15:42:29,507 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) [2024-09-12 15:42:29,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1731 transitions. [2024-09-12 15:42:29,511 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1731 transitions. Word has length 85 [2024-09-12 15:42:29,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:42:29,512 INFO L474 AbstractCegarLoop]: Abstraction has 1080 states and 1731 transitions. [2024-09-12 15:42:29,512 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) [2024-09-12 15:42:29,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:29,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1731 transitions. [2024-09-12 15:42:29,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-12 15:42:29,513 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:42:29,513 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] [2024-09-12 15:42:29,525 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-12 15:42:29,713 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 [2024-09-12 15:42:29,714 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:42:29,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:29,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1412818839, now seen corresponding path program 2 times [2024-09-12 15:42:29,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:42:29,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859786800] [2024-09-12 15:42:29,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:29,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:42:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:29,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:42:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:29,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:42:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:29,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 15:42:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:29,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:42:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:29,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:42:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:29,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 15:42:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:29,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 15:42:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:29,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-12 15:42:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:29,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-12 15:42:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:29,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-12 15:42:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:29,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-12 15:42:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:42:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-12 15:42:29,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:42:29,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859786800] [2024-09-12 15:42:29,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859786800] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:42:29,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410380308] [2024-09-12 15:42:29,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:42:29,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:29,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:42:29,873 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) [2024-09-12 15:42:29,874 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-12 15:42:29,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:42:29,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:42:29,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 15:42:29,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:42:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-12 15:42:29,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:42:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-12 15:42:30,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410380308] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:42:30,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:42:30,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-09-12 15:42:30,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290395196] [2024-09-12 15:42:30,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:42:30,047 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 15:42:30,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:42:30,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 15:42:30,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-12 15:42:30,048 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) [2024-09-12 15:42:31,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:42:31,306 INFO L93 Difference]: Finished difference Result 1218 states and 1947 transitions. [2024-09-12 15:42:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 15:42:31,307 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 [2024-09-12 15:42:31,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:42:31,312 INFO L225 Difference]: With dead ends: 1218 [2024-09-12 15:42:31,312 INFO L226 Difference]: Without dead ends: 1211 [2024-09-12 15:42:31,313 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 [2024-09-12 15:42:31,313 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 [2024-09-12 15:42:31,314 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] [2024-09-12 15:42:31,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2024-09-12 15:42:32,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1049. [2024-09-12 15:42:32,160 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) [2024-09-12 15:42:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1688 transitions. [2024-09-12 15:42:32,164 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1688 transitions. Word has length 87 [2024-09-12 15:42:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:42:32,165 INFO L474 AbstractCegarLoop]: Abstraction has 1049 states and 1688 transitions. [2024-09-12 15:42:32,165 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) [2024-09-12 15:42:32,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1688 transitions. [2024-09-12 15:42:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-12 15:42:32,166 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:42:32,166 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] [2024-09-12 15:42:32,179 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-12 15:42:32,366 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 [2024-09-12 15:42:32,366 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:42:32,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:32,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1409368955, now seen corresponding path program 5 times [2024-09-12 15:42:32,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:42:32,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238258302] [2024-09-12 15:42:32,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:32,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:42:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:42:32,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633393839] [2024-09-12 15:42:32,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:42:32,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:32,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:42:32,380 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) [2024-09-12 15:42:32,380 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-12 15:42:32,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-12 15:42:32,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:42:32,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-12 15:42:32,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:42:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-12 15:42:33,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:42:34,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:42:34,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238258302] [2024-09-12 15:42:34,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:42:34,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633393839] [2024-09-12 15:42:34,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633393839] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:42:34,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:42:34,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-12 15:42:34,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392623121] [2024-09-12 15:42:34,609 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:42:34,609 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-12 15:42:34,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:42:34,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-12 15:42:34,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2024-09-12 15:42:34,610 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) [2024-09-12 15:42:36,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:42:36,424 INFO L93 Difference]: Finished difference Result 1186 states and 1894 transitions. [2024-09-12 15:42:36,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 15:42:36,424 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 [2024-09-12 15:42:36,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:42:36,430 INFO L225 Difference]: With dead ends: 1186 [2024-09-12 15:42:36,430 INFO L226 Difference]: Without dead ends: 1184 [2024-09-12 15:42:36,430 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 15:42:36,431 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 55 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2024-09-12 15:42:36,431 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] [2024-09-12 15:42:36,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2024-09-12 15:42:37,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1166. [2024-09-12 15:42:37,339 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) [2024-09-12 15:42:37,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1874 transitions. [2024-09-12 15:42:37,344 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1874 transitions. Word has length 90 [2024-09-12 15:42:37,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:42:37,345 INFO L474 AbstractCegarLoop]: Abstraction has 1166 states and 1874 transitions. [2024-09-12 15:42:37,345 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) [2024-09-12 15:42:37,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:37,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1874 transitions. [2024-09-12 15:42:37,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-12 15:42:37,346 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:42:37,346 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] [2024-09-12 15:42:37,353 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-12 15:42:37,547 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 [2024-09-12 15:42:37,547 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:42:37,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:37,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1093787319, now seen corresponding path program 2 times [2024-09-12 15:42:37,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:42:37,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253938094] [2024-09-12 15:42:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:37,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:42:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:42:37,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951791768] [2024-09-12 15:42:37,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:42:37,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:37,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:42:37,563 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) [2024-09-12 15:42:37,564 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-12 15:42:37,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:42:37,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:42:37,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-12 15:42:37,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:42:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2024-09-12 15:42:38,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:42:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-09-12 15:42:40,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:42:40,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253938094] [2024-09-12 15:42:40,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:42:40,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951791768] [2024-09-12 15:42:40,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951791768] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:42:40,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:42:40,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2024-09-12 15:42:40,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495849070] [2024-09-12 15:42:40,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:42:40,790 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-12 15:42:40,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:42:40,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-12 15:42:40,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2024-09-12 15:42:40,792 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) [2024-09-12 15:42:52,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:42:52,999 INFO L93 Difference]: Finished difference Result 1381 states and 2196 transitions. [2024-09-12 15:42:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-09-12 15:42:53,001 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 [2024-09-12 15:42:53,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:42:53,007 INFO L225 Difference]: With dead ends: 1381 [2024-09-12 15:42:53,007 INFO L226 Difference]: Without dead ends: 1373 [2024-09-12 15:42:53,008 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1128, Invalid=4572, Unknown=0, NotChecked=0, Total=5700 [2024-09-12 15:42:53,008 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 232 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s 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, 3.9s IncrementalHoareTripleChecker+Time [2024-09-12 15:42:53,009 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 765 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-09-12 15:42:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2024-09-12 15:42:54,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1344. [2024-09-12 15:42:54,177 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) [2024-09-12 15:42:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 2156 transitions. [2024-09-12 15:42:54,185 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 2156 transitions. Word has length 96 [2024-09-12 15:42:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:42:54,186 INFO L474 AbstractCegarLoop]: Abstraction has 1344 states and 2156 transitions. [2024-09-12 15:42:54,186 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) [2024-09-12 15:42:54,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 2156 transitions. [2024-09-12 15:42:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-12 15:42:54,187 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:42:54,187 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] [2024-09-12 15:42:54,200 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-12 15:42:54,391 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 [2024-09-12 15:42:54,391 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:42:54,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:42:54,392 INFO L85 PathProgramCache]: Analyzing trace with hash -187092685, now seen corresponding path program 6 times [2024-09-12 15:42:54,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:42:54,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647586053] [2024-09-12 15:42:54,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:42:54,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:42:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:42:54,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809857011] [2024-09-12 15:42:54,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:42:54,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:42:54,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:42:54,410 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) [2024-09-12 15:42:54,411 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-12 15:42:54,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 15:42:54,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:42:54,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-12 15:42:54,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:42:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 91 proven. 35 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-09-12 15:42:55,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:42:58,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:42:58,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647586053] [2024-09-12 15:42:58,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:42:58,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809857011] [2024-09-12 15:42:58,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809857011] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:42:58,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:42:58,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-12 15:42:58,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478630724] [2024-09-12 15:42:58,723 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:42:58,723 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 15:42:58,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:42:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 15:42:58,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2024-09-12 15:42:58,724 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) [2024-09-12 15:43:04,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:43:04,292 INFO L93 Difference]: Finished difference Result 1474 states and 2358 transitions. [2024-09-12 15:43:04,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-12 15:43:04,292 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 [2024-09-12 15:43:04,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:43:04,299 INFO L225 Difference]: With dead ends: 1474 [2024-09-12 15:43:04,299 INFO L226 Difference]: Without dead ends: 1472 [2024-09-12 15:43:04,300 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 15:43:04,300 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 68 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:43:04,300 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 363 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:43:04,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2024-09-12 15:43:05,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1356. [2024-09-12 15:43:05,577 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) [2024-09-12 15:43:05,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 2169 transitions. [2024-09-12 15:43:05,581 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 2169 transitions. Word has length 95 [2024-09-12 15:43:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:43:05,582 INFO L474 AbstractCegarLoop]: Abstraction has 1356 states and 2169 transitions. [2024-09-12 15:43:05,582 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) [2024-09-12 15:43:05,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:43:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 2169 transitions. [2024-09-12 15:43:05,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-12 15:43:05,583 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:43:05,583 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] [2024-09-12 15:43:05,589 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-12 15:43:05,783 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 [2024-09-12 15:43:05,784 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:43:05,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:43:05,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1017703828, now seen corresponding path program 3 times [2024-09-12 15:43:05,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:43:05,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815071341] [2024-09-12 15:43:05,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:43:05,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:43:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:43:05,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204303014] [2024-09-12 15:43:05,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:43:05,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:43:05,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:43:05,802 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) [2024-09-12 15:43:05,802 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-12 15:43:05,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-12 15:43:05,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:43:05,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-12 15:43:05,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:43:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2024-09-12 15:43:06,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:43:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-09-12 15:43:09,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:43:09,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815071341] [2024-09-12 15:43:09,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:43:09,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204303014] [2024-09-12 15:43:09,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204303014] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:43:09,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:43:09,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2024-09-12 15:43:09,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414591340] [2024-09-12 15:43:09,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:43:09,657 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 15:43:09,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:43:09,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 15:43:09,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2024-09-12 15:43:09,657 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) [2024-09-12 15:43:26,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:43:26,651 INFO L93 Difference]: Finished difference Result 2168 states and 3461 transitions. [2024-09-12 15:43:26,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-09-12 15:43:26,651 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 [2024-09-12 15:43:26,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:43:26,658 INFO L225 Difference]: With dead ends: 2168 [2024-09-12 15:43:26,658 INFO L226 Difference]: Without dead ends: 1621 [2024-09-12 15:43:26,662 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2737 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=1791, Invalid=7715, Unknown=0, NotChecked=0, Total=9506 [2024-09-12 15:43:26,662 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 255 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s 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, 3.5s IncrementalHoareTripleChecker+Time [2024-09-12 15:43:26,662 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 761 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-09-12 15:43:26,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2024-09-12 15:43:28,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1481. [2024-09-12 15:43:28,264 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) [2024-09-12 15:43:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2366 transitions. [2024-09-12 15:43:28,269 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2366 transitions. Word has length 99 [2024-09-12 15:43:28,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:43:28,270 INFO L474 AbstractCegarLoop]: Abstraction has 1481 states and 2366 transitions. [2024-09-12 15:43:28,270 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) [2024-09-12 15:43:28,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:43:28,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2366 transitions. [2024-09-12 15:43:28,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-12 15:43:28,271 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:43:28,271 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] [2024-09-12 15:43:28,277 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-12 15:43:28,472 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 [2024-09-12 15:43:28,472 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:43:28,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:43:28,472 INFO L85 PathProgramCache]: Analyzing trace with hash -396138734, now seen corresponding path program 4 times [2024-09-12 15:43:28,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:43:28,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356764628] [2024-09-12 15:43:28,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:43:28,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:43:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:43:28,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761319762] [2024-09-12 15:43:28,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:43:28,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:43:28,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:43:28,492 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) [2024-09-12 15:43:28,494 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-12 15:43:28,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:43:28,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:43:28,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-12 15:43:28,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:43:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 52 proven. 46 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-12 15:43:30,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:43:39,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:43:39,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356764628] [2024-09-12 15:43:39,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:43:39,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761319762] [2024-09-12 15:43:39,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761319762] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:43:39,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:43:39,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-12 15:43:39,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391819284] [2024-09-12 15:43:39,401 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:43:39,402 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 15:43:39,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:43:39,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 15:43:39,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1172, Unknown=1, NotChecked=0, Total=1332 [2024-09-12 15:43:39,403 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) [2024-09-12 15:43:43,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:43:43,062 INFO L93 Difference]: Finished difference Result 1613 states and 2569 transitions. [2024-09-12 15:43:43,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 15:43:43,063 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 [2024-09-12 15:43:43,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:43:43,070 INFO L225 Difference]: With dead ends: 1613 [2024-09-12 15:43:43,070 INFO L226 Difference]: Without dead ends: 1606 [2024-09-12 15:43:43,071 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=286, Invalid=1969, Unknown=1, NotChecked=0, Total=2256 [2024-09-12 15:43:43,071 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 84 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2024-09-12 15:43:43,071 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 711 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-12 15:43:43,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2024-09-12 15:43:44,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1485. [2024-09-12 15:43:44,679 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) [2024-09-12 15:43:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2369 transitions. [2024-09-12 15:43:44,684 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2369 transitions. Word has length 104 [2024-09-12 15:43:44,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:43:44,684 INFO L474 AbstractCegarLoop]: Abstraction has 1485 states and 2369 transitions. [2024-09-12 15:43:44,685 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) [2024-09-12 15:43:44,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:43:44,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2369 transitions. [2024-09-12 15:43:44,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-12 15:43:44,686 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:43:44,687 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] [2024-09-12 15:43:44,699 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-12 15:43:44,887 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 [2024-09-12 15:43:44,887 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:43:44,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:43:44,887 INFO L85 PathProgramCache]: Analyzing trace with hash 920643019, now seen corresponding path program 2 times [2024-09-12 15:43:44,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:43:44,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366169241] [2024-09-12 15:43:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:43:44,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:43:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:43:44,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183534597] [2024-09-12 15:43:44,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:43:44,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:43:44,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:43:44,901 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) [2024-09-12 15:43:44,902 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-12 15:43:44,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:43:44,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:43:44,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-12 15:43:44,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:43:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 52 proven. 56 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2024-09-12 15:43:45,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:43:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 56 proven. 52 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2024-09-12 15:43:50,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:43:50,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366169241] [2024-09-12 15:43:50,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:43:50,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183534597] [2024-09-12 15:43:50,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183534597] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:43:50,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:43:50,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2024-09-12 15:43:50,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350593646] [2024-09-12 15:43:50,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:43:50,959 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 15:43:50,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:43:50,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 15:43:50,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2024-09-12 15:43:50,960 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) [2024-09-12 15:44:09,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:44:09,515 INFO L93 Difference]: Finished difference Result 1742 states and 2731 transitions. [2024-09-12 15:44:09,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-09-12 15:44:09,516 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 [2024-09-12 15:44:09,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:44:09,523 INFO L225 Difference]: With dead ends: 1742 [2024-09-12 15:44:09,523 INFO L226 Difference]: Without dead ends: 1740 [2024-09-12 15:44:09,524 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 [2024-09-12 15:44:09,525 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 180 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s 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, 4.7s IncrementalHoareTripleChecker+Time [2024-09-12 15:44:09,525 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 812 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-09-12 15:44:09,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2024-09-12 15:44:11,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1596. [2024-09-12 15:44:11,611 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) [2024-09-12 15:44:11,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2511 transitions. [2024-09-12 15:44:11,617 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2511 transitions. Word has length 109 [2024-09-12 15:44:11,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:44:11,617 INFO L474 AbstractCegarLoop]: Abstraction has 1596 states and 2511 transitions. [2024-09-12 15:44:11,617 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) [2024-09-12 15:44:11,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:44:11,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2511 transitions. [2024-09-12 15:44:11,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-12 15:44:11,619 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:44:11,619 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] [2024-09-12 15:44:11,635 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-12 15:44:11,819 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 [2024-09-12 15:44:11,820 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:44:11,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:44:11,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2081223370, now seen corresponding path program 5 times [2024-09-12 15:44:11,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:44:11,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910320633] [2024-09-12 15:44:11,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:44:11,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:44:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:44:11,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827628693] [2024-09-12 15:44:11,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:44:11,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:44:11,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:44:11,843 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) [2024-09-12 15:44:11,844 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-12 15:44:11,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-12 15:44:11,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:44:11,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-09-12 15:44:11,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:44:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-12 15:44:12,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:44:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 91 proven. 64 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2024-09-12 15:44:15,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:44:15,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910320633] [2024-09-12 15:44:15,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:44:15,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827628693] [2024-09-12 15:44:15,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827628693] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:44:15,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:44:15,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2024-09-12 15:44:15,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048460329] [2024-09-12 15:44:15,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:44:15,923 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-12 15:44:15,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:44:15,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-12 15:44:15,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 15:44:15,925 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) [2024-09-12 15:44:25,781 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 [] [2024-09-12 15:44:44,098 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 [] [2024-09-12 15:44:49,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:44:49,006 INFO L93 Difference]: Finished difference Result 1788 states and 2773 transitions. [2024-09-12 15:44:49,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-09-12 15:44:49,007 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 [2024-09-12 15:44:49,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:44:49,014 INFO L225 Difference]: With dead ends: 1788 [2024-09-12 15:44:49,014 INFO L226 Difference]: Without dead ends: 1784 [2024-09-12 15:44:49,016 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=1369, Invalid=5771, Unknown=0, NotChecked=0, Total=7140 [2024-09-12 15:44:49,016 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 287 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 338 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:44:49,016 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 962 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 1426 Invalid, 2 Unknown, 0 Unchecked, 12.4s Time] [2024-09-12 15:44:49,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2024-09-12 15:44:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1695. [2024-09-12 15:44:51,955 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) [2024-09-12 15:44:51,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2662 transitions. [2024-09-12 15:44:51,961 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2662 transitions. Word has length 109 [2024-09-12 15:44:51,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:44:51,961 INFO L474 AbstractCegarLoop]: Abstraction has 1695 states and 2662 transitions. [2024-09-12 15:44:51,961 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) [2024-09-12 15:44:51,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:44:51,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2662 transitions. [2024-09-12 15:44:51,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-09-12 15:44:51,963 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:44:51,964 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] [2024-09-12 15:44:51,973 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-12 15:44:52,164 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 [2024-09-12 15:44:52,164 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:44:52,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:44:52,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1733684403, now seen corresponding path program 6 times [2024-09-12 15:44:52,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:44:52,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993127461] [2024-09-12 15:44:52,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:44:52,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:44:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:44:52,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004024249] [2024-09-12 15:44:52,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:44:52,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:44:52,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:44:52,188 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) [2024-09-12 15:44:52,189 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-12 15:44:52,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-12 15:44:52,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:44:52,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-09-12 15:44:52,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:44:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 95 proven. 67 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2024-09-12 15:44:53,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:44:55,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:44:55,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993127461] [2024-09-12 15:44:55,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:44:55,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004024249] [2024-09-12 15:44:55,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004024249] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:44:55,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:44:55,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-12 15:44:55,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401881828] [2024-09-12 15:44:55,090 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:44:55,090 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 15:44:55,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:44:55,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 15:44:55,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-09-12 15:44:55,091 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) [2024-09-12 15:44:59,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:44:59,978 INFO L93 Difference]: Finished difference Result 2006 states and 3144 transitions. [2024-09-12 15:44:59,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 15:44:59,978 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 [2024-09-12 15:44:59,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:44:59,986 INFO L225 Difference]: With dead ends: 2006 [2024-09-12 15:44:59,986 INFO L226 Difference]: Without dead ends: 2003 [2024-09-12 15:44:59,987 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 15:44:59,987 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 64 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 15:44:59,987 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 666 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 15:44:59,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2024-09-12 15:45:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1874. [2024-09-12 15:45:03,422 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) [2024-09-12 15:45:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 2938 transitions. [2024-09-12 15:45:03,427 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 2938 transitions. Word has length 126 [2024-09-12 15:45:03,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:45:03,427 INFO L474 AbstractCegarLoop]: Abstraction has 1874 states and 2938 transitions. [2024-09-12 15:45:03,428 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) [2024-09-12 15:45:03,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:45:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 2938 transitions. [2024-09-12 15:45:03,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-09-12 15:45:03,430 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:45:03,430 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] [2024-09-12 15:45:03,438 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-12 15:45:03,630 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 [2024-09-12 15:45:03,631 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:45:03,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:45:03,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1887231395, now seen corresponding path program 3 times [2024-09-12 15:45:03,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:45:03,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466701433] [2024-09-12 15:45:03,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:45:03,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:45:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:45:03,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633042078] [2024-09-12 15:45:03,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:45:03,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:45:03,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:45:03,646 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) [2024-09-12 15:45:03,647 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-12 15:45:03,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-12 15:45:03,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:45:03,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-12 15:45:03,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:45:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 106 proven. 65 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2024-09-12 15:45:04,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:45:08,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:45:08,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466701433] [2024-09-12 15:45:08,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:45:08,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633042078] [2024-09-12 15:45:08,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633042078] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:45:08,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:45:08,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-12 15:45:08,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76683500] [2024-09-12 15:45:08,186 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:45:08,186 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 15:45:08,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:45:08,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 15:45:08,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2024-09-12 15:45:08,187 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) [2024-09-12 15:45:12,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:45:12,301 INFO L93 Difference]: Finished difference Result 2059 states and 3224 transitions. [2024-09-12 15:45:12,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 15:45:12,302 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 [2024-09-12 15:45:12,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:45:12,310 INFO L225 Difference]: With dead ends: 2059 [2024-09-12 15:45:12,310 INFO L226 Difference]: Without dead ends: 2057 [2024-09-12 15:45:12,310 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 15:45:12,311 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 37 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:45:12,311 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 382 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:45:12,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2024-09-12 15:45:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 2012. [2024-09-12 15:45:15,825 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) [2024-09-12 15:45:15,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2012 states to 2012 states and 3158 transitions. [2024-09-12 15:45:15,831 INFO L78 Accepts]: Start accepts. Automaton has 2012 states and 3158 transitions. Word has length 129 [2024-09-12 15:45:15,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:45:15,831 INFO L474 AbstractCegarLoop]: Abstraction has 2012 states and 3158 transitions. [2024-09-12 15:45:15,831 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) [2024-09-12 15:45:15,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:45:15,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2012 states and 3158 transitions. [2024-09-12 15:45:15,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-09-12 15:45:15,833 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:45:15,833 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] [2024-09-12 15:45:15,846 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-12 15:45:16,034 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 [2024-09-12 15:45:16,034 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:45:16,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:45:16,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1329164778, now seen corresponding path program 7 times [2024-09-12 15:45:16,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:45:16,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838251693] [2024-09-12 15:45:16,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:45:16,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:45:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:45:16,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126539374] [2024-09-12 15:45:16,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:45:16,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:45:16,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:45:16,059 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) [2024-09-12 15:45:16,060 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-12 15:45:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:45:16,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-09-12 15:45:16,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:45:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 70 proven. 76 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2024-09-12 15:45:17,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:45:18,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:45:18,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838251693] [2024-09-12 15:45:18,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:45:18,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126539374] [2024-09-12 15:45:18,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126539374] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:45:18,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:45:18,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-12 15:45:18,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028450451] [2024-09-12 15:45:18,365 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 15:45:18,365 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 15:45:18,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:45:18,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 15:45:18,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2024-09-12 15:45:18,366 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) [2024-09-12 15:45:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:45:23,233 INFO L93 Difference]: Finished difference Result 2146 states and 3364 transitions. [2024-09-12 15:45:23,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-12 15:45:23,233 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 [2024-09-12 15:45:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:45:23,241 INFO L225 Difference]: With dead ends: 2146 [2024-09-12 15:45:23,241 INFO L226 Difference]: Without dead ends: 2139 [2024-09-12 15:45:23,242 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 15:45:23,242 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 89 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 15:45:23,242 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 663 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 15:45:23,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2024-09-12 15:45:27,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2124. [2024-09-12 15:45:27,062 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) [2024-09-12 15:45:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 3342 transitions. [2024-09-12 15:45:27,068 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 3342 transitions. Word has length 129 [2024-09-12 15:45:27,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:45:27,069 INFO L474 AbstractCegarLoop]: Abstraction has 2124 states and 3342 transitions. [2024-09-12 15:45:27,069 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) [2024-09-12 15:45:27,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:45:27,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 3342 transitions. [2024-09-12 15:45:27,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-09-12 15:45:27,072 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:45:27,072 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] [2024-09-12 15:45:27,085 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-12 15:45:27,276 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 [2024-09-12 15:45:27,276 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:45:27,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:45:27,277 INFO L85 PathProgramCache]: Analyzing trace with hash 979073460, now seen corresponding path program 4 times [2024-09-12 15:45:27,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:45:27,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845153346] [2024-09-12 15:45:27,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:45:27,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:45:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 15:45:27,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127765954] [2024-09-12 15:45:27,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:45:27,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:45:27,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:45:27,301 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) [2024-09-12 15:45:27,302 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-12 15:45:27,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:45:27,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:45:27,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-12 15:45:27,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:45:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 48 proven. 125 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2024-09-12 15:45:28,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:45:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 63 proven. 107 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2024-09-12 15:45:33,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:45:33,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845153346] [2024-09-12 15:45:33,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 15:45:33,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127765954] [2024-09-12 15:45:33,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127765954] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:45:33,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 15:45:33,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2024-09-12 15:45:33,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806703664] [2024-09-12 15:45:33,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 15:45:33,366 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-12 15:45:33,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:45:33,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-12 15:45:33,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 15:45:33,367 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) [2024-09-12 15:45:54,322 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 [] [2024-09-12 15:46:18,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:46:18,339 INFO L93 Difference]: Finished difference Result 3210 states and 5103 transitions. [2024-09-12 15:46:18,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-09-12 15:46:18,339 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 137 [2024-09-12 15:46:18,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:46:18,349 INFO L225 Difference]: With dead ends: 3210 [2024-09-12 15:46:18,349 INFO L226 Difference]: Without dead ends: 2973 [2024-09-12 15:46:18,351 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2951 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=2222, Invalid=9334, Unknown=0, NotChecked=0, Total=11556 [2024-09-12 15:46:18,351 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 281 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 348 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 1974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:46:18,352 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 901 Invalid, 1974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 1625 Invalid, 1 Unknown, 0 Unchecked, 14.0s Time] [2024-09-12 15:46:18,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states.