./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.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 f5697d76d3e5ae232d0e056ee307ac88ca38e983a94c4765bc5d51f77e79d2f7 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 19:53:29,896 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 19:53:30,001 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 19:53:30,008 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 19:53:30,010 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 19:53:30,041 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 19:53:30,042 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 19:53:30,042 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 19:53:30,043 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 19:53:30,044 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 19:53:30,045 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 19:53:30,045 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 19:53:30,046 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 19:53:30,046 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 19:53:30,048 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 19:53:30,048 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 19:53:30,048 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 19:53:30,048 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 19:53:30,049 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 19:53:30,049 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 19:53:30,049 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 19:53:30,053 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 19:53:30,053 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 19:53:30,053 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 19:53:30,053 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 19:53:30,054 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 19:53:30,054 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 19:53:30,054 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 19:53:30,054 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 19:53:30,055 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 19:53:30,055 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 19:53:30,055 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 19:53:30,055 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:53:30,055 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 19:53:30,055 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 19:53:30,056 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 19:53:30,056 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 19:53:30,056 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 19:53:30,056 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 19:53:30,057 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 19:53:30,057 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 19:53:30,057 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 19:53:30,058 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5697d76d3e5ae232d0e056ee307ac88ca38e983a94c4765bc5d51f77e79d2f7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 19:53:30,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 19:53:30,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 19:53:30,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 19:53:30,302 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 19:53:30,303 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 19:53:30,304 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2024-09-11 19:53:31,693 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 19:53:31,880 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 19:53:31,881 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2024-09-11 19:53:31,888 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/5a0ddfc86/ec631c8180144cbc9aeca5062ae8ba46/FLAGd9b1ac56d [2024-09-11 19:53:31,901 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/5a0ddfc86/ec631c8180144cbc9aeca5062ae8ba46 [2024-09-11 19:53:31,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 19:53:31,905 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 19:53:31,906 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 19:53:31,906 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 19:53:31,911 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 19:53:31,912 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:53:31" (1/1) ... [2024-09-11 19:53:31,913 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@140c5df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:53:31, skipping insertion in model container [2024-09-11 19:53:31,913 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 07:53:31" (1/1) ... [2024-09-11 19:53:31,930 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 19:53:32,083 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-scaling/egcd2-ll_valuebound100.c[490,503] [2024-09-11 19:53:32,112 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:53:32,124 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 19:53:32,137 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-scaling/egcd2-ll_valuebound100.c[490,503] [2024-09-11 19:53:32,152 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 19:53:32,173 INFO L204 MainTranslator]: Completed translation [2024-09-11 19:53:32,173 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:53:32 WrapperNode [2024-09-11 19:53:32,173 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 19:53:32,175 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 19:53:32,175 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 19:53:32,176 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 19:53:32,182 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:53:32" (1/1) ... [2024-09-11 19:53:32,190 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:53:32" (1/1) ... [2024-09-11 19:53:32,215 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2024-09-11 19:53:32,215 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 19:53:32,216 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 19:53:32,216 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 19:53:32,216 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 19:53:32,226 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:53:32" (1/1) ... [2024-09-11 19:53:32,227 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:53:32" (1/1) ... [2024-09-11 19:53:32,228 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:53:32" (1/1) ... [2024-09-11 19:53:32,244 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-11 19:53:32,245 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:53:32" (1/1) ... [2024-09-11 19:53:32,246 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:53:32" (1/1) ... [2024-09-11 19:53:32,250 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:53:32" (1/1) ... [2024-09-11 19:53:32,257 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:53:32" (1/1) ... [2024-09-11 19:53:32,258 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:53:32" (1/1) ... [2024-09-11 19:53:32,262 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:53:32" (1/1) ... [2024-09-11 19:53:32,263 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 19:53:32,264 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 19:53:32,268 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 19:53:32,268 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 19:53:32,269 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:53:32" (1/1) ... [2024-09-11 19:53:32,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 19:53:32,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:53:32,301 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-11 19:53:32,304 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-11 19:53:32,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 19:53:32,348 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-11 19:53:32,349 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-11 19:53:32,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 19:53:32,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 19:53:32,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 19:53:32,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 19:53:32,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 19:53:32,413 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 19:53:32,415 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 19:53:32,628 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-09-11 19:53:32,628 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 19:53:32,656 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 19:53:32,656 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-11 19:53:32,657 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:53:32 BoogieIcfgContainer [2024-09-11 19:53:32,657 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 19:53:32,659 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 19:53:32,659 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 19:53:32,664 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 19:53:32,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 07:53:31" (1/3) ... [2024-09-11 19:53:32,666 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ecc158c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:53:32, skipping insertion in model container [2024-09-11 19:53:32,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 07:53:32" (2/3) ... [2024-09-11 19:53:32,666 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ecc158c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 07:53:32, skipping insertion in model container [2024-09-11 19:53:32,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 07:53:32" (3/3) ... [2024-09-11 19:53:32,667 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.c [2024-09-11 19:53:32,684 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 19:53:32,684 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 19:53:32,734 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 19:53:32,740 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;@7762c552, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 19:53:32,742 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 19:53:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-11 19:53:32,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-11 19:53:32,753 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:53:32,753 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:53:32,754 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:53:32,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:32,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1865535902, now seen corresponding path program 1 times [2024-09-11 19:53:32,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:53:32,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680343126] [2024-09-11 19:53:32,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:32,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:53:32,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:32,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:53:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:32,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:53:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:32,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:53:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:32,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:53:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:32,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 19:53:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:32,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 19:53:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-11 19:53:33,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:53:33,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680343126] [2024-09-11 19:53:33,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680343126] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:53:33,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:53:33,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 19:53:33,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451372524] [2024-09-11 19:53:33,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:53:33,016 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 19:53:33,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:53:33,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 19:53:33,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:53:33,041 INFO L87 Difference]: Start difference. First operand has 32 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 19:53:33,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:53:33,078 INFO L93 Difference]: Finished difference Result 62 states and 107 transitions. [2024-09-11 19:53:33,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 19:53:33,081 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2024-09-11 19:53:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:53:33,088 INFO L225 Difference]: With dead ends: 62 [2024-09-11 19:53:33,089 INFO L226 Difference]: Without dead ends: 30 [2024-09-11 19:53:33,092 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 19:53:33,096 INFO L434 NwaCegarLoop]: 41 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, 41 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:53:33,097 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:53:33,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-11 19:53:33,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-11 19:53:33,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-11 19:53:33,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2024-09-11 19:53:33,139 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 38 [2024-09-11 19:53:33,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:53:33,140 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2024-09-11 19:53:33,140 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 19:53:33,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:33,141 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2024-09-11 19:53:33,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-11 19:53:33,142 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:53:33,142 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:53:33,143 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 19:53:33,143 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:53:33,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:33,143 INFO L85 PathProgramCache]: Analyzing trace with hash -279596905, now seen corresponding path program 1 times [2024-09-11 19:53:33,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:53:33,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621240062] [2024-09-11 19:53:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:33,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:53:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:33,399 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:53:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:33,406 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:53:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:33,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:53:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:33,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:53:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:33,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 19:53:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:33,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 19:53:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-11 19:53:33,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:53:33,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621240062] [2024-09-11 19:53:33,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621240062] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:53:33,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038595953] [2024-09-11 19:53:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:33,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:33,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:53:33,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:53:33,489 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 19:53:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:33,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-11 19:53:33,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:53:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-11 19:53:33,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:53:34,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038595953] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:53:34,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:53:34,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-09-11 19:53:34,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548094251] [2024-09-11 19:53:34,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:53:34,051 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 19:53:34,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:53:34,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 19:53:34,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:53:34,055 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-11 19:53:34,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:53:34,319 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2024-09-11 19:53:34,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 19:53:34,319 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 39 [2024-09-11 19:53:34,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:53:34,321 INFO L225 Difference]: With dead ends: 51 [2024-09-11 19:53:34,321 INFO L226 Difference]: Without dead ends: 43 [2024-09-11 19:53:34,321 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-09-11 19:53:34,323 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:53:34,323 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 187 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:53:34,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-11 19:53:34,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-09-11 19:53:34,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-11 19:53:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2024-09-11 19:53:34,344 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 39 [2024-09-11 19:53:34,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:53:34,344 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2024-09-11 19:53:34,344 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-11 19:53:34,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:34,345 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2024-09-11 19:53:34,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-11 19:53:34,346 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:53:34,346 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:53:34,362 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-11 19:53:34,550 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:34,551 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:53:34,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:34,551 INFO L85 PathProgramCache]: Analyzing trace with hash -76887146, now seen corresponding path program 1 times [2024-09-11 19:53:34,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:53:34,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968824474] [2024-09-11 19:53:34,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:34,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:53:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:53:34,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138982148] [2024-09-11 19:53:34,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:34,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:34,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:53:34,574 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:53:34,576 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 19:53:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:34,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:53:34,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:53:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-11 19:53:34,662 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:53:34,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:53:34,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968824474] [2024-09-11 19:53:34,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:53:34,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138982148] [2024-09-11 19:53:34,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138982148] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:53:34,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:53:34,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:53:34,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642905773] [2024-09-11 19:53:34,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:53:34,664 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:53:34,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:53:34,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:53:34,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:53:34,665 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-11 19:53:34,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:53:34,716 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2024-09-11 19:53:34,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:53:34,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2024-09-11 19:53:34,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:53:34,719 INFO L225 Difference]: With dead ends: 61 [2024-09-11 19:53:34,719 INFO L226 Difference]: Without dead ends: 59 [2024-09-11 19:53:34,720 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 [2024-09-11 19:53:34,721 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:53:34,722 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 129 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:53:34,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-11 19:53:34,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2024-09-11 19:53:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-11 19:53:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2024-09-11 19:53:34,743 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 40 [2024-09-11 19:53:34,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:53:34,744 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2024-09-11 19:53:34,744 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-11 19:53:34,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:34,744 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2024-09-11 19:53:34,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-11 19:53:34,746 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:53:34,746 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2024-09-11 19:53:34,764 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-11 19:53:34,947 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:34,948 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:53:34,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:34,948 INFO L85 PathProgramCache]: Analyzing trace with hash 345761675, now seen corresponding path program 1 times [2024-09-11 19:53:34,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:53:34,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470404242] [2024-09-11 19:53:34,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:34,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:53:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:53:34,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645191309] [2024-09-11 19:53:34,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:34,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:34,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:53:34,980 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:53:34,983 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 19:53:35,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:35,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-11 19:53:35,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:53:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-11 19:53:35,132 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 19:53:35,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:53:35,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470404242] [2024-09-11 19:53:35,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:53:35,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645191309] [2024-09-11 19:53:35,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645191309] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:53:35,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:53:35,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:53:35,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38400014] [2024-09-11 19:53:35,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:53:35,134 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:53:35,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:53:35,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:53:35,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:53:35,135 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-11 19:53:35,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:53:35,189 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2024-09-11 19:53:35,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 19:53:35,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2024-09-11 19:53:35,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:53:35,194 INFO L225 Difference]: With dead ends: 57 [2024-09-11 19:53:35,194 INFO L226 Difference]: Without dead ends: 55 [2024-09-11 19:53:35,194 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 19:53:35,195 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:53:35,196 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 139 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:53:35,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-11 19:53:35,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-09-11 19:53:35,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-11 19:53:35,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2024-09-11 19:53:35,209 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 45 [2024-09-11 19:53:35,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:53:35,209 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2024-09-11 19:53:35,209 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-11 19:53:35,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:35,210 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2024-09-11 19:53:35,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-11 19:53:35,211 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:53:35,211 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 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] [2024-09-11 19:53:35,227 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-11 19:53:35,414 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:35,415 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:53:35,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:35,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2047387093, now seen corresponding path program 1 times [2024-09-11 19:53:35,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:53:35,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710623699] [2024-09-11 19:53:35,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:35,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:53:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:53:35,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573990005] [2024-09-11 19:53:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:35,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:35,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:53:35,435 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:53:35,438 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 19:53:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:35,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-11 19:53:35,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:53:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-11 19:53:35,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:53:35,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:53:35,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710623699] [2024-09-11 19:53:35,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:53:35,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573990005] [2024-09-11 19:53:35,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573990005] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:53:35,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:53:35,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-11 19:53:35,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482498679] [2024-09-11 19:53:35,829 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:53:35,829 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 19:53:35,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:53:35,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 19:53:35,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:53:35,830 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-11 19:53:35,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:53:35,948 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2024-09-11 19:53:35,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:53:35,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2024-09-11 19:53:35,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:53:35,950 INFO L225 Difference]: With dead ends: 61 [2024-09-11 19:53:35,950 INFO L226 Difference]: Without dead ends: 59 [2024-09-11 19:53:35,950 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-09-11 19:53:35,951 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:53:35,951 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 150 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:53:35,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-11 19:53:35,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-09-11 19:53:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.121212121212121) internal successors, (37), 36 states have internal predecessors, (37), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-11 19:53:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2024-09-11 19:53:35,969 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 55 [2024-09-11 19:53:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:53:35,970 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2024-09-11 19:53:35,970 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-11 19:53:35,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:35,970 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2024-09-11 19:53:35,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-11 19:53:35,971 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:53:35,973 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:53:35,989 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-11 19:53:36,177 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:36,177 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:53:36,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:36,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1705825109, now seen corresponding path program 1 times [2024-09-11 19:53:36,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:53:36,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637973584] [2024-09-11 19:53:36,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:36,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:53:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:53:36,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640852423] [2024-09-11 19:53:36,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:36,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:36,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:53:36,197 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:53:36,206 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 19:53:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:36,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-11 19:53:36,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:53:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-11 19:53:36,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:53:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-11 19:53:36,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:53:36,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637973584] [2024-09-11 19:53:36,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:53:36,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640852423] [2024-09-11 19:53:36,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640852423] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:53:36,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:53:36,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-11 19:53:36,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957578864] [2024-09-11 19:53:36,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:53:36,434 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-11 19:53:36,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:53:36,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-11 19:53:36,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:53:36,435 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-11 19:53:36,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:53:36,548 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2024-09-11 19:53:36,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:53:36,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 62 [2024-09-11 19:53:36,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:53:36,552 INFO L225 Difference]: With dead ends: 86 [2024-09-11 19:53:36,552 INFO L226 Difference]: Without dead ends: 84 [2024-09-11 19:53:36,553 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:53:36,554 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:53:36,554 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 180 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:53:36,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-11 19:53:36,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2024-09-11 19:53:36,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-11 19:53:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-09-11 19:53:36,580 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 62 [2024-09-11 19:53:36,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:53:36,581 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-09-11 19:53:36,581 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-11 19:53:36,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:36,584 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-09-11 19:53:36,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-11 19:53:36,585 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:53:36,585 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:53:36,603 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-11 19:53:36,789 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-11 19:53:36,789 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:53:36,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:36,790 INFO L85 PathProgramCache]: Analyzing trace with hash 392643903, now seen corresponding path program 1 times [2024-09-11 19:53:36,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:53:36,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98877680] [2024-09-11 19:53:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:36,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:53:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:36,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:53:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:36,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:53:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:36,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:53:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:37,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:53:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:37,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 19:53:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:37,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 19:53:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:37,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-11 19:53:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:37,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-11 19:53:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:37,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-11 19:53:37,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:37,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-11 19:53:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-11 19:53:37,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:53:37,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98877680] [2024-09-11 19:53:37,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98877680] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:53:37,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297556332] [2024-09-11 19:53:37,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:37,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:37,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:53:37,037 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 19:53:37,041 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 19:53:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:37,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-11 19:53:37,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:53:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-11 19:53:37,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:53:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-11 19:53:37,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297556332] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:53:37,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:53:37,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-11 19:53:37,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649931093] [2024-09-11 19:53:37,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:53:37,248 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-11 19:53:37,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:53:37,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-11 19:53:37,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-11 19:53:37,249 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-09-11 19:53:37,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:53:37,451 INFO L93 Difference]: Finished difference Result 101 states and 141 transitions. [2024-09-11 19:53:37,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 19:53:37,452 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2024-09-11 19:53:37,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:53:37,453 INFO L225 Difference]: With dead ends: 101 [2024-09-11 19:53:37,453 INFO L226 Difference]: Without dead ends: 93 [2024-09-11 19:53:37,454 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-11 19:53:37,454 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 32 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:53:37,455 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 283 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:53:37,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-11 19:53:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2024-09-11 19:53:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-11 19:53:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2024-09-11 19:53:37,481 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 64 [2024-09-11 19:53:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:53:37,482 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2024-09-11 19:53:37,482 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-09-11 19:53:37,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:37,482 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2024-09-11 19:53:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-11 19:53:37,483 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:53:37,483 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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, 1, 1, 1] [2024-09-11 19:53:37,502 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-11 19:53:37,684 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:37,684 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:53:37,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:37,685 INFO L85 PathProgramCache]: Analyzing trace with hash -45785549, now seen corresponding path program 1 times [2024-09-11 19:53:37,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:53:37,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574235194] [2024-09-11 19:53:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:37,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:53:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:53:37,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526077889] [2024-09-11 19:53:37,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:37,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:37,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:53:37,703 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) [2024-09-11 19:53:37,704 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 19:53:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:37,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-11 19:53:37,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:53:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-11 19:53:37,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:53:37,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:53:37,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574235194] [2024-09-11 19:53:37,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:53:37,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526077889] [2024-09-11 19:53:37,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526077889] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:53:37,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:53:37,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-09-11 19:53:37,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398651571] [2024-09-11 19:53:37,909 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:53:37,909 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-11 19:53:37,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:53:37,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-11 19:53:37,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:53:37,910 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-11 19:53:38,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:53:38,044 INFO L93 Difference]: Finished difference Result 119 states and 168 transitions. [2024-09-11 19:53:38,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 19:53:38,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2024-09-11 19:53:38,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:53:38,046 INFO L225 Difference]: With dead ends: 119 [2024-09-11 19:53:38,046 INFO L226 Difference]: Without dead ends: 116 [2024-09-11 19:53:38,046 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:53:38,047 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:53:38,047 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 190 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:53:38,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-09-11 19:53:38,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2024-09-11 19:53:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 62 states have internal predecessors, (73), 45 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-11 19:53:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 161 transitions. [2024-09-11 19:53:38,082 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 161 transitions. Word has length 70 [2024-09-11 19:53:38,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:53:38,082 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 161 transitions. [2024-09-11 19:53:38,082 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-11 19:53:38,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 161 transitions. [2024-09-11 19:53:38,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-09-11 19:53:38,084 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:53:38,084 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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, 1] [2024-09-11 19:53:38,100 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-11 19:53:38,284 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:38,285 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:53:38,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:38,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1519552206, now seen corresponding path program 2 times [2024-09-11 19:53:38,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:53:38,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35556201] [2024-09-11 19:53:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:38,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:53:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:53:38,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484572380] [2024-09-11 19:53:38,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:53:38,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:38,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:53:38,314 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) [2024-09-11 19:53:38,315 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-11 19:53:38,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:53:38,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:53:38,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-11 19:53:38,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:53:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-11 19:53:38,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:53:38,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:53:38,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35556201] [2024-09-11 19:53:38,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:53:38,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484572380] [2024-09-11 19:53:38,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484572380] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:53:38,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:53:38,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-11 19:53:38,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192763082] [2024-09-11 19:53:38,587 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:53:38,588 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-11 19:53:38,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:53:38,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-11 19:53:38,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-11 19:53:38,589 INFO L87 Difference]: Start difference. First operand 113 states and 161 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-11 19:53:38,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:53:38,745 INFO L93 Difference]: Finished difference Result 125 states and 171 transitions. [2024-09-11 19:53:38,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 19:53:38,745 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2024-09-11 19:53:38,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:53:38,747 INFO L225 Difference]: With dead ends: 125 [2024-09-11 19:53:38,747 INFO L226 Difference]: Without dead ends: 123 [2024-09-11 19:53:38,748 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-11 19:53:38,749 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 12 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:53:38,750 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 207 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:53:38,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-09-11 19:53:38,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2024-09-11 19:53:38,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 66 states have (on average 1.196969696969697) internal successors, (79), 68 states have internal predecessors, (79), 45 states have call successors, (45), 9 states have call predecessors, (45), 9 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-11 19:53:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 167 transitions. [2024-09-11 19:53:38,797 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 167 transitions. Word has length 75 [2024-09-11 19:53:38,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:53:38,797 INFO L474 AbstractCegarLoop]: Abstraction has 121 states and 167 transitions. [2024-09-11 19:53:38,797 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-11 19:53:38,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:38,798 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 167 transitions. [2024-09-11 19:53:38,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-11 19:53:38,798 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:53:38,799 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1] [2024-09-11 19:53:38,811 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-11 19:53:39,002 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:39,003 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:53:39,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:39,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1881497901, now seen corresponding path program 3 times [2024-09-11 19:53:39,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:53:39,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930543790] [2024-09-11 19:53:39,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:39,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:53:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:53:39,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276130211] [2024-09-11 19:53:39,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:53:39,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:39,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:53:39,024 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) [2024-09-11 19:53:39,027 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-11 19:53:39,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 19:53:39,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:53:39,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-11 19:53:39,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:53:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 43 proven. 20 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-09-11 19:53:41,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:53:41,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:53:41,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930543790] [2024-09-11 19:53:41,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:53:41,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276130211] [2024-09-11 19:53:41,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276130211] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:53:41,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:53:41,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-11 19:53:41,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845391927] [2024-09-11 19:53:41,225 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:53:41,225 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-11 19:53:41,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:53:41,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-11 19:53:41,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-09-11 19:53:41,227 INFO L87 Difference]: Start difference. First operand 121 states and 167 transitions. Second operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-11 19:53:42,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:53:42,041 INFO L93 Difference]: Finished difference Result 133 states and 177 transitions. [2024-09-11 19:53:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-11 19:53:42,042 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2024-09-11 19:53:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:53:42,045 INFO L225 Difference]: With dead ends: 133 [2024-09-11 19:53:42,045 INFO L226 Difference]: Without dead ends: 131 [2024-09-11 19:53:42,045 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2024-09-11 19:53:42,046 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 23 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 19:53:42,047 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 296 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 19:53:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-11 19:53:42,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-09-11 19:53:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 74 states have internal predecessors, (85), 45 states have call successors, (45), 11 states have call predecessors, (45), 11 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-11 19:53:42,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 173 transitions. [2024-09-11 19:53:42,086 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 173 transitions. Word has length 80 [2024-09-11 19:53:42,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:53:42,086 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 173 transitions. [2024-09-11 19:53:42,086 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-11 19:53:42,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:42,087 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 173 transitions. [2024-09-11 19:53:42,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-11 19:53:42,088 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:53:42,088 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1] [2024-09-11 19:53:42,105 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-11 19:53:42,289 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-11 19:53:42,289 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:53:42,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:42,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1305329662, now seen corresponding path program 1 times [2024-09-11 19:53:42,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:53:42,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694304859] [2024-09-11 19:53:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:42,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:53:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:53:42,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140647096] [2024-09-11 19:53:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:42,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:42,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:53:42,317 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) [2024-09-11 19:53:42,322 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-11 19:53:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:42,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-11 19:53:42,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:53:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-11 19:53:42,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:53:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-11 19:53:43,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:53:43,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694304859] [2024-09-11 19:53:43,787 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:53:43,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140647096] [2024-09-11 19:53:43,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140647096] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:53:43,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:53:43,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-11 19:53:43,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518462316] [2024-09-11 19:53:43,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:53:43,787 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 19:53:43,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:53:43,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 19:53:43,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-11 19:53:43,789 INFO L87 Difference]: Start difference. First operand 129 states and 173 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-11 19:53:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:53:46,680 INFO L93 Difference]: Finished difference Result 229 states and 336 transitions. [2024-09-11 19:53:46,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-11 19:53:46,681 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 86 [2024-09-11 19:53:46,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:53:46,683 INFO L225 Difference]: With dead ends: 229 [2024-09-11 19:53:46,684 INFO L226 Difference]: Without dead ends: 225 [2024-09-11 19:53:46,685 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-09-11 19:53:46,686 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 77 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-11 19:53:46,686 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 434 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-11 19:53:46,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-11 19:53:46,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2024-09-11 19:53:46,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 114 states have (on average 1.236842105263158) internal successors, (141), 117 states have internal predecessors, (141), 94 states have call successors, (94), 13 states have call predecessors, (94), 13 states have return successors, (92), 91 states have call predecessors, (92), 92 states have call successors, (92) [2024-09-11 19:53:46,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 327 transitions. [2024-09-11 19:53:46,784 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 327 transitions. Word has length 86 [2024-09-11 19:53:46,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:53:46,784 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 327 transitions. [2024-09-11 19:53:46,784 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-11 19:53:46,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:46,785 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 327 transitions. [2024-09-11 19:53:46,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-11 19:53:46,786 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:53:46,786 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 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] [2024-09-11 19:53:46,803 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-11 19:53:46,990 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-11 19:53:46,991 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:53:46,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:46,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1470837899, now seen corresponding path program 4 times [2024-09-11 19:53:46,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:53:46,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378579381] [2024-09-11 19:53:46,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:46,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:53:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:47,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:53:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:47,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:53:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:47,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:53:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:47,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:53:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:47,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 19:53:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:47,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 19:53:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:47,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-11 19:53:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:47,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-11 19:53:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:47,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-11 19:53:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:47,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-11 19:53:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:47,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-11 19:53:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:47,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-11 19:53:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:47,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-11 19:53:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:47,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-11 19:53:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:47,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-11 19:53:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-09-11 19:53:47,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:53:47,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378579381] [2024-09-11 19:53:47,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378579381] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 19:53:47,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 19:53:47,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 19:53:47,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603135709] [2024-09-11 19:53:47,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 19:53:47,137 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 19:53:47,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:53:47,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 19:53:47,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 19:53:47,138 INFO L87 Difference]: Start difference. First operand 222 states and 327 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-11 19:53:47,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:53:47,245 INFO L93 Difference]: Finished difference Result 275 states and 403 transitions. [2024-09-11 19:53:47,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 19:53:47,245 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 95 [2024-09-11 19:53:47,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:53:47,247 INFO L225 Difference]: With dead ends: 275 [2024-09-11 19:53:47,247 INFO L226 Difference]: Without dead ends: 201 [2024-09-11 19:53:47,248 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:53:47,249 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:53:47,249 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 166 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 19:53:47,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-11 19:53:47,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 189. [2024-09-11 19:53:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 97 states have (on average 1.175257731958763) internal successors, (114), 100 states have internal predecessors, (114), 78 states have call successors, (78), 13 states have call predecessors, (78), 13 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2024-09-11 19:53:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 268 transitions. [2024-09-11 19:53:47,325 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 268 transitions. Word has length 95 [2024-09-11 19:53:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:53:47,326 INFO L474 AbstractCegarLoop]: Abstraction has 189 states and 268 transitions. [2024-09-11 19:53:47,326 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-11 19:53:47,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:47,326 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 268 transitions. [2024-09-11 19:53:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-09-11 19:53:47,327 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:53:47,328 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 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] [2024-09-11 19:53:47,328 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-11 19:53:47,328 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:53:47,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:47,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1556724626, now seen corresponding path program 1 times [2024-09-11 19:53:47,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:53:47,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803522857] [2024-09-11 19:53:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:47,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:53:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:53:47,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983992205] [2024-09-11 19:53:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:47,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:47,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:53:47,351 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) [2024-09-11 19:53:47,353 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-11 19:53:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:47,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-11 19:53:47,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:53:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 74 proven. 35 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2024-09-11 19:53:48,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:53:49,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:53:49,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803522857] [2024-09-11 19:53:49,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:53:49,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983992205] [2024-09-11 19:53:49,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983992205] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:53:49,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:53:49,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-11 19:53:49,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567176968] [2024-09-11 19:53:49,473 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:53:49,473 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-11 19:53:49,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:53:49,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-11 19:53:49,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2024-09-11 19:53:49,474 INFO L87 Difference]: Start difference. First operand 189 states and 268 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-11 19:53:50,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:53:50,033 INFO L93 Difference]: Finished difference Result 201 states and 278 transitions. [2024-09-11 19:53:50,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-11 19:53:50,034 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 102 [2024-09-11 19:53:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:53:50,036 INFO L225 Difference]: With dead ends: 201 [2024-09-11 19:53:50,036 INFO L226 Difference]: Without dead ends: 199 [2024-09-11 19:53:50,036 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2024-09-11 19:53:50,037 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 28 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:53:50,037 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 327 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 19:53:50,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-09-11 19:53:50,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2024-09-11 19:53:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 106 states have internal predecessors, (120), 78 states have call successors, (78), 15 states have call predecessors, (78), 15 states have return successors, (76), 75 states have call predecessors, (76), 76 states have call successors, (76) [2024-09-11 19:53:50,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 274 transitions. [2024-09-11 19:53:50,108 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 274 transitions. Word has length 102 [2024-09-11 19:53:50,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:53:50,108 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 274 transitions. [2024-09-11 19:53:50,108 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-11 19:53:50,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:50,109 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 274 transitions. [2024-09-11 19:53:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-09-11 19:53:50,111 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:53:50,111 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-09-11 19:53:50,128 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-11 19:53:50,311 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:50,312 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:53:50,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:50,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1903041589, now seen corresponding path program 1 times [2024-09-11 19:53:50,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:53:50,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266292834] [2024-09-11 19:53:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:50,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:53:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 19:53:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 19:53:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 19:53:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 19:53:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 19:53:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-11 19:53:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-11 19:53:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-11 19:53:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-11 19:53:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-11 19:53:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-11 19:53:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-11 19:53:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-11 19:53:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-11 19:53:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-11 19:53:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-11 19:53:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-11 19:53:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-11 19:53:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-09-11 19:53:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-11 19:53:50,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:53:50,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266292834] [2024-09-11 19:53:50,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266292834] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:53:50,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003311163] [2024-09-11 19:53:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:50,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:50,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:53:50,489 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) [2024-09-11 19:53:50,490 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-11 19:53:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:53:50,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 19:53:50,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:53:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-09-11 19:53:50,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:53:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-11 19:53:50,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003311163] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:53:50,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 19:53:50,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-11 19:53:50,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16451116] [2024-09-11 19:53:50,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 19:53:50,666 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-11 19:53:50,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:53:50,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-11 19:53:50,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-11 19:53:50,666 INFO L87 Difference]: Start difference. First operand 197 states and 274 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2024-09-11 19:53:50,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:53:50,923 INFO L93 Difference]: Finished difference Result 223 states and 313 transitions. [2024-09-11 19:53:50,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-11 19:53:50,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) Word has length 116 [2024-09-11 19:53:50,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:53:50,925 INFO L225 Difference]: With dead ends: 223 [2024-09-11 19:53:50,925 INFO L226 Difference]: Without dead ends: 211 [2024-09-11 19:53:50,926 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 267 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-09-11 19:53:50,926 INFO L434 NwaCegarLoop]: 67 mSDtfsCounter, 17 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 19:53:50,926 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 318 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 19:53:50,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-09-11 19:53:50,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 192. [2024-09-11 19:53:50,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 100 states have (on average 1.16) internal successors, (116), 102 states have internal predecessors, (116), 77 states have call successors, (77), 14 states have call predecessors, (77), 14 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2024-09-11 19:53:50,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 268 transitions. [2024-09-11 19:53:50,998 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 268 transitions. Word has length 116 [2024-09-11 19:53:50,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:53:50,999 INFO L474 AbstractCegarLoop]: Abstraction has 192 states and 268 transitions. [2024-09-11 19:53:50,999 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 4 states have call predecessors, (20), 4 states have call successors, (20) [2024-09-11 19:53:50,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:50,999 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 268 transitions. [2024-09-11 19:53:51,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-11 19:53:51,000 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:53:51,000 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:53:51,017 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-11 19:53:51,204 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-11 19:53:51,204 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:53:51,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:51,205 INFO L85 PathProgramCache]: Analyzing trace with hash -956526070, now seen corresponding path program 2 times [2024-09-11 19:53:51,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:53:51,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943023371] [2024-09-11 19:53:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:51,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:53:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:53:51,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877924536] [2024-09-11 19:53:51,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:53:51,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:51,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:53:51,227 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) [2024-09-11 19:53:51,232 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-11 19:53:51,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:53:51,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:53:51,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-11 19:53:51,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:53:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 61 proven. 50 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-09-11 19:53:51,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:53:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2024-09-11 19:53:52,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:53:52,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943023371] [2024-09-11 19:53:52,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:53:52,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877924536] [2024-09-11 19:53:52,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877924536] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:53:52,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:53:52,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2024-09-11 19:53:52,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918615618] [2024-09-11 19:53:52,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:53:52,029 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-11 19:53:52,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:53:52,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-11 19:53:52,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2024-09-11 19:53:52,031 INFO L87 Difference]: Start difference. First operand 192 states and 268 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-11 19:53:53,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:53:53,912 INFO L93 Difference]: Finished difference Result 226 states and 314 transitions. [2024-09-11 19:53:53,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-11 19:53:53,912 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 117 [2024-09-11 19:53:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:53:53,915 INFO L225 Difference]: With dead ends: 226 [2024-09-11 19:53:53,915 INFO L226 Difference]: Without dead ends: 223 [2024-09-11 19:53:53,915 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2024-09-11 19:53:53,916 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 53 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:53:53,916 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 571 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-11 19:53:53,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-09-11 19:53:54,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 165. [2024-09-11 19:53:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 89 states have internal predecessors, (102), 63 states have call successors, (63), 13 states have call predecessors, (63), 13 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2024-09-11 19:53:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 227 transitions. [2024-09-11 19:53:54,023 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 227 transitions. Word has length 117 [2024-09-11 19:53:54,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:53:54,023 INFO L474 AbstractCegarLoop]: Abstraction has 165 states and 227 transitions. [2024-09-11 19:53:54,024 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-11 19:53:54,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:54,024 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 227 transitions. [2024-09-11 19:53:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-09-11 19:53:54,025 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:53:54,025 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:53:54,041 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-11 19:53:54,225 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-11 19:53:54,226 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:53:54,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:54,226 INFO L85 PathProgramCache]: Analyzing trace with hash 457852880, now seen corresponding path program 3 times [2024-09-11 19:53:54,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:53:54,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789296796] [2024-09-11 19:53:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:54,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:53:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:53:54,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355663345] [2024-09-11 19:53:54,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:53:54,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:54,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:53:54,252 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) [2024-09-11 19:53:54,256 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-11 19:53:54,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 19:53:54,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:53:54,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-11 19:53:54,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:53:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-11 19:53:54,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:53:55,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:53:55,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789296796] [2024-09-11 19:53:55,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:53:55,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355663345] [2024-09-11 19:53:55,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355663345] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:53:55,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:53:55,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-11 19:53:55,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979254635] [2024-09-11 19:53:55,517 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:53:55,517 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-11 19:53:55,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:53:55,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-11 19:53:55,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-09-11 19:53:55,518 INFO L87 Difference]: Start difference. First operand 165 states and 227 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-11 19:53:55,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:53:55,822 INFO L93 Difference]: Finished difference Result 203 states and 276 transitions. [2024-09-11 19:53:55,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-11 19:53:55,822 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 119 [2024-09-11 19:53:55,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:53:55,824 INFO L225 Difference]: With dead ends: 203 [2024-09-11 19:53:55,824 INFO L226 Difference]: Without dead ends: 201 [2024-09-11 19:53:55,824 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2024-09-11 19:53:55,825 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 22 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 19:53:55,825 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 322 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 19:53:55,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-11 19:53:55,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2024-09-11 19:53:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 106 states have (on average 1.150943396226415) internal successors, (122), 107 states have internal predecessors, (122), 75 states have call successors, (75), 16 states have call predecessors, (75), 16 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2024-09-11 19:53:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 271 transitions. [2024-09-11 19:53:55,908 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 271 transitions. Word has length 119 [2024-09-11 19:53:55,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:53:55,908 INFO L474 AbstractCegarLoop]: Abstraction has 198 states and 271 transitions. [2024-09-11 19:53:55,908 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-11 19:53:55,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:55,909 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 271 transitions. [2024-09-11 19:53:55,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-09-11 19:53:55,910 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:53:55,910 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:53:55,931 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-11 19:53:56,110 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-11 19:53:56,110 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:53:56,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:56,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2126175913, now seen corresponding path program 4 times [2024-09-11 19:53:56,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:53:56,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931690692] [2024-09-11 19:53:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:56,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:53:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:53:56,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944134799] [2024-09-11 19:53:56,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:53:56,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:56,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:53:56,135 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) [2024-09-11 19:53:56,137 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-11 19:53:56,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:53:56,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:53:56,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-11 19:53:56,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:53:57,008 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 57 proven. 47 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-11 19:53:57,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:53:58,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:53:58,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931690692] [2024-09-11 19:53:58,492 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:53:58,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944134799] [2024-09-11 19:53:58,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944134799] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:53:58,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:53:58,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-11 19:53:58,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608066837] [2024-09-11 19:53:58,492 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:53:58,493 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 19:53:58,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:53:58,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 19:53:58,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-09-11 19:53:58,494 INFO L87 Difference]: Start difference. First operand 198 states and 271 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-11 19:53:59,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:53:59,268 INFO L93 Difference]: Finished difference Result 261 states and 358 transitions. [2024-09-11 19:53:59,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-11 19:53:59,268 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 122 [2024-09-11 19:53:59,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:53:59,270 INFO L225 Difference]: With dead ends: 261 [2024-09-11 19:53:59,270 INFO L226 Difference]: Without dead ends: 259 [2024-09-11 19:53:59,270 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2024-09-11 19:53:59,270 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 22 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 19:53:59,271 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 493 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 19:53:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-09-11 19:53:59,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 256. [2024-09-11 19:53:59,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 136 states have (on average 1.1470588235294117) internal successors, (156), 137 states have internal predecessors, (156), 99 states have call successors, (99), 20 states have call predecessors, (99), 20 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2024-09-11 19:53:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 353 transitions. [2024-09-11 19:53:59,401 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 353 transitions. Word has length 122 [2024-09-11 19:53:59,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:53:59,401 INFO L474 AbstractCegarLoop]: Abstraction has 256 states and 353 transitions. [2024-09-11 19:53:59,402 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-11 19:53:59,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:59,402 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 353 transitions. [2024-09-11 19:53:59,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-09-11 19:53:59,403 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:53:59,403 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:53:59,420 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-11 19:53:59,604 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-11 19:53:59,604 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:53:59,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:53:59,605 INFO L85 PathProgramCache]: Analyzing trace with hash 71118609, now seen corresponding path program 5 times [2024-09-11 19:53:59,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:53:59,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233032153] [2024-09-11 19:53:59,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:53:59,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:53:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:53:59,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966464173] [2024-09-11 19:53:59,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:53:59,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:53:59,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:53:59,626 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) [2024-09-11 19:53:59,631 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-11 19:53:59,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-11 19:53:59,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:53:59,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-11 19:53:59,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 76 proven. 67 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2024-09-11 19:54:00,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:54:03,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:54:03,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233032153] [2024-09-11 19:54:03,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:54:03,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966464173] [2024-09-11 19:54:03,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966464173] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:54:03,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:54:03,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-11 19:54:03,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643874707] [2024-09-11 19:54:03,597 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:54:03,598 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 19:54:03,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:54:03,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 19:54:03,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-09-11 19:54:03,599 INFO L87 Difference]: Start difference. First operand 256 states and 353 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 8 states have call predecessors, (21), 6 states have call successors, (21) [2024-09-11 19:54:04,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:54:04,801 INFO L93 Difference]: Finished difference Result 264 states and 360 transitions. [2024-09-11 19:54:04,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 19:54:04,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 8 states have call predecessors, (21), 6 states have call successors, (21) Word has length 124 [2024-09-11 19:54:04,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:54:04,803 INFO L225 Difference]: With dead ends: 264 [2024-09-11 19:54:04,803 INFO L226 Difference]: Without dead ends: 262 [2024-09-11 19:54:04,803 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-09-11 19:54:04,804 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 24 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:54:04,804 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 494 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-11 19:54:04,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-09-11 19:54:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2024-09-11 19:54:04,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 139 states have (on average 1.143884892086331) internal successors, (159), 140 states have internal predecessors, (159), 99 states have call successors, (99), 21 states have call predecessors, (99), 21 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2024-09-11 19:54:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 356 transitions. [2024-09-11 19:54:04,925 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 356 transitions. Word has length 124 [2024-09-11 19:54:04,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:54:04,926 INFO L474 AbstractCegarLoop]: Abstraction has 260 states and 356 transitions. [2024-09-11 19:54:04,926 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 8 states have call predecessors, (21), 6 states have call successors, (21) [2024-09-11 19:54:04,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 356 transitions. [2024-09-11 19:54:04,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-09-11 19:54:04,927 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:54:04,927 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:54:04,933 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-11 19:54:05,127 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:05,128 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:54:05,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:54:05,128 INFO L85 PathProgramCache]: Analyzing trace with hash 2088776170, now seen corresponding path program 6 times [2024-09-11 19:54:05,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:54:05,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454190987] [2024-09-11 19:54:05,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:54:05,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:54:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:54:05,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743613313] [2024-09-11 19:54:05,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:54:05,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:54:05,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:54:05,162 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) [2024-09-11 19:54:05,164 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-11 19:54:05,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-11 19:54:05,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:54:05,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-09-11 19:54:05,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:54:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 134 proven. 68 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2024-09-11 19:54:15,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:54:41,431 WARN L293 SmtUtils]: Spent 8.89s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:55:20,354 WARN L293 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-11 19:55:36,149 WARN L293 SmtUtils]: Spent 6.16s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 19:55:40,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:55:40,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454190987] [2024-09-11 19:55:40,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:55:40,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743613313] [2024-09-11 19:55:40,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743613313] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:55:40,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:55:40,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-11 19:55:40,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311334230] [2024-09-11 19:55:40,896 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:55:40,896 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-11 19:55:40,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:55:40,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-11 19:55:40,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=717, Unknown=2, NotChecked=0, Total=870 [2024-09-11 19:55:40,897 INFO L87 Difference]: Start difference. First operand 260 states and 356 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-11 19:55:52,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-11 19:56:06,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 7.22s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-11 19:56:08,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:56:08,698 INFO L93 Difference]: Finished difference Result 289 states and 379 transitions. [2024-09-11 19:56:08,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-11 19:56:08,699 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 127 [2024-09-11 19:56:08,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:56:08,700 INFO L225 Difference]: With dead ends: 289 [2024-09-11 19:56:08,701 INFO L226 Difference]: Without dead ends: 287 [2024-09-11 19:56:08,701 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 56.0s TimeCoverageRelationStatistics Valid=241, Invalid=1163, Unknown=2, NotChecked=0, Total=1406 [2024-09-11 19:56:08,702 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 25 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 35 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2024-09-11 19:56:08,702 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 451 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 452 Invalid, 2 Unknown, 0 Unchecked, 21.3s Time] [2024-09-11 19:56:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-09-11 19:56:08,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 284. [2024-09-11 19:56:08,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 157 states have (on average 1.127388535031847) internal successors, (177), 158 states have internal predecessors, (177), 99 states have call successors, (99), 27 states have call predecessors, (99), 27 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2024-09-11 19:56:08,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 374 transitions. [2024-09-11 19:56:08,814 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 374 transitions. Word has length 127 [2024-09-11 19:56:08,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:56:08,814 INFO L474 AbstractCegarLoop]: Abstraction has 284 states and 374 transitions. [2024-09-11 19:56:08,815 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-11 19:56:08,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:56:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 374 transitions. [2024-09-11 19:56:08,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-09-11 19:56:08,816 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:56:08,816 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:56:08,823 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-11 19:56:09,017 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:56:09,017 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:56:09,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:56:09,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1600677333, now seen corresponding path program 2 times [2024-09-11 19:56:09,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:56:09,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333762782] [2024-09-11 19:56:09,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:56:09,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:56:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:56:09,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621293331] [2024-09-11 19:56:09,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:56:09,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:56:09,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:56:09,038 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) [2024-09-11 19:56:09,042 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-11 19:56:09,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:56:09,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:56:09,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-11 19:56:09,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:56:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-11 19:56:09,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:56:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-11 19:56:11,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:56:11,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333762782] [2024-09-11 19:56:11,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:56:11,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621293331] [2024-09-11 19:56:11,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621293331] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:56:11,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:56:11,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2024-09-11 19:56:11,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363829912] [2024-09-11 19:56:11,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:56:11,928 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-11 19:56:11,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:56:11,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-11 19:56:11,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2024-09-11 19:56:11,929 INFO L87 Difference]: Start difference. First operand 284 states and 374 transitions. Second operand has 27 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 14 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) [2024-09-11 19:56:19,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:56:19,060 INFO L93 Difference]: Finished difference Result 372 states and 511 transitions. [2024-09-11 19:56:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-11 19:56:19,060 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 14 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) Word has length 133 [2024-09-11 19:56:19,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:56:19,063 INFO L225 Difference]: With dead ends: 372 [2024-09-11 19:56:19,063 INFO L226 Difference]: Without dead ends: 368 [2024-09-11 19:56:19,064 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=572, Invalid=2290, Unknown=0, NotChecked=0, Total=2862 [2024-09-11 19:56:19,064 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 90 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:56:19,064 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 752 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-09-11 19:56:19,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2024-09-11 19:56:19,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 350. [2024-09-11 19:56:19,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 184 states have (on average 1.1467391304347827) internal successors, (211), 185 states have internal predecessors, (211), 135 states have call successors, (135), 30 states have call predecessors, (135), 30 states have return successors, (134), 134 states have call predecessors, (134), 134 states have call successors, (134) [2024-09-11 19:56:19,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 480 transitions. [2024-09-11 19:56:19,373 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 480 transitions. Word has length 133 [2024-09-11 19:56:19,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:56:19,373 INFO L474 AbstractCegarLoop]: Abstraction has 350 states and 480 transitions. [2024-09-11 19:56:19,373 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 14 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 12 states have call predecessors, (40), 12 states have call successors, (40) [2024-09-11 19:56:19,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:56:19,374 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 480 transitions. [2024-09-11 19:56:19,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-09-11 19:56:19,375 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:56:19,375 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:56:19,389 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-11 19:56:19,576 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:56:19,576 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:56:19,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:56:19,576 INFO L85 PathProgramCache]: Analyzing trace with hash -181771727, now seen corresponding path program 7 times [2024-09-11 19:56:19,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:56:19,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086730350] [2024-09-11 19:56:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:56:19,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:56:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:56:19,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241642816] [2024-09-11 19:56:19,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 19:56:19,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:56:19,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:56:19,607 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) [2024-09-11 19:56:19,609 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-11 19:56:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:56:19,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-11 19:56:19,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:56:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 42 proven. 63 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2024-09-11 19:56:20,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:56:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 36 proven. 54 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-09-11 19:56:21,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:56:21,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086730350] [2024-09-11 19:56:21,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:56:21,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241642816] [2024-09-11 19:56:21,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241642816] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:56:21,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:56:21,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-11 19:56:21,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758331222] [2024-09-11 19:56:21,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:56:21,468 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-11 19:56:21,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:56:21,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-11 19:56:21,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2024-09-11 19:56:21,469 INFO L87 Difference]: Start difference. First operand 350 states and 480 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 20 states have internal predecessors, (46), 14 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (46), 14 states have call predecessors, (46), 14 states have call successors, (46) [2024-09-11 19:56:24,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-11 19:56:27,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:56:27,416 INFO L93 Difference]: Finished difference Result 468 states and 669 transitions. [2024-09-11 19:56:27,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-11 19:56:27,417 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 20 states have internal predecessors, (46), 14 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (46), 14 states have call predecessors, (46), 14 states have call successors, (46) Word has length 141 [2024-09-11 19:56:27,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:56:27,420 INFO L225 Difference]: With dead ends: 468 [2024-09-11 19:56:27,420 INFO L226 Difference]: Without dead ends: 466 [2024-09-11 19:56:27,420 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=379, Invalid=1601, Unknown=0, NotChecked=0, Total=1980 [2024-09-11 19:56:27,421 INFO L434 NwaCegarLoop]: 72 mSDtfsCounter, 79 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:56:27,421 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 898 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-09-11 19:56:27,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2024-09-11 19:56:27,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 422. [2024-09-11 19:56:27,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 217 states have (on average 1.1658986175115207) internal successors, (253), 218 states have internal predecessors, (253), 171 states have call successors, (171), 33 states have call predecessors, (171), 33 states have return successors, (170), 170 states have call predecessors, (170), 170 states have call successors, (170) [2024-09-11 19:56:27,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 594 transitions. [2024-09-11 19:56:27,759 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 594 transitions. Word has length 141 [2024-09-11 19:56:27,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:56:27,759 INFO L474 AbstractCegarLoop]: Abstraction has 422 states and 594 transitions. [2024-09-11 19:56:27,759 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 20 states have internal predecessors, (46), 14 states have call successors, (47), 3 states have call predecessors, (47), 2 states have return successors, (46), 14 states have call predecessors, (46), 14 states have call successors, (46) [2024-09-11 19:56:27,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:56:27,759 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 594 transitions. [2024-09-11 19:56:27,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-09-11 19:56:27,760 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:56:27,760 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:56:27,775 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-11 19:56:27,961 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-11 19:56:27,961 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:56:27,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:56:27,961 INFO L85 PathProgramCache]: Analyzing trace with hash -412950698, now seen corresponding path program 8 times [2024-09-11 19:56:27,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:56:27,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280428791] [2024-09-11 19:56:27,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:56:27,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:56:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:56:27,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256160831] [2024-09-11 19:56:27,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:56:27,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:56:27,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:56:27,988 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) [2024-09-11 19:56:27,990 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-11 19:56:28,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:56:28,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:56:28,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-11 19:56:28,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:56:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 83 proven. 78 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2024-09-11 19:56:28,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:56:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 87 proven. 59 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2024-09-11 19:56:30,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:56:30,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280428791] [2024-09-11 19:56:30,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:56:30,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256160831] [2024-09-11 19:56:30,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256160831] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 19:56:30,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 19:56:30,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2024-09-11 19:56:30,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741246100] [2024-09-11 19:56:30,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 19:56:30,771 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-11 19:56:30,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:56:30,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-11 19:56:30,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2024-09-11 19:56:30,772 INFO L87 Difference]: Start difference. First operand 422 states and 594 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 27 states have internal predecessors, (57), 16 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 16 states have call predecessors, (46), 16 states have call successors, (46) [2024-09-11 19:56:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:56:34,576 INFO L93 Difference]: Finished difference Result 493 states and 687 transitions. [2024-09-11 19:56:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-11 19:56:34,578 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 27 states have internal predecessors, (57), 16 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 16 states have call predecessors, (46), 16 states have call successors, (46) Word has length 144 [2024-09-11 19:56:34,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:56:34,581 INFO L225 Difference]: With dead ends: 493 [2024-09-11 19:56:34,581 INFO L226 Difference]: Without dead ends: 491 [2024-09-11 19:56:34,581 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=495, Invalid=2261, Unknown=0, NotChecked=0, Total=2756 [2024-09-11 19:56:34,582 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 76 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-11 19:56:34,582 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 775 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-11 19:56:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2024-09-11 19:56:34,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 424. [2024-09-11 19:56:34,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 226 states have (on average 1.154867256637168) internal successors, (261), 229 states have internal predecessors, (261), 161 states have call successors, (161), 36 states have call predecessors, (161), 36 states have return successors, (160), 158 states have call predecessors, (160), 160 states have call successors, (160) [2024-09-11 19:56:34,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 582 transitions. [2024-09-11 19:56:34,961 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 582 transitions. Word has length 144 [2024-09-11 19:56:34,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:56:34,961 INFO L474 AbstractCegarLoop]: Abstraction has 424 states and 582 transitions. [2024-09-11 19:56:34,961 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 27 states have internal predecessors, (57), 16 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 16 states have call predecessors, (46), 16 states have call successors, (46) [2024-09-11 19:56:34,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:56:34,962 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 582 transitions. [2024-09-11 19:56:34,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-09-11 19:56:34,963 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:56:34,963 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:56:34,977 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-11 19:56:35,163 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-11 19:56:35,164 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:56:35,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:56:35,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1508075856, now seen corresponding path program 9 times [2024-09-11 19:56:35,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:56:35,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694325666] [2024-09-11 19:56:35,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:56:35,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:56:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:56:35,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818553884] [2024-09-11 19:56:35,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:56:35,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:56:35,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:56:35,188 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) [2024-09-11 19:56:35,190 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-11 19:56:35,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 19:56:35,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:56:35,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-11 19:56:35,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:56:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 121 proven. 35 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2024-09-11 19:56:37,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:56:41,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:56:41,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694325666] [2024-09-11 19:56:41,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:56:41,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818553884] [2024-09-11 19:56:41,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818553884] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:56:41,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:56:41,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-11 19:56:41,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866470749] [2024-09-11 19:56:41,327 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:56:41,327 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-11 19:56:41,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:56:41,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-11 19:56:41,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2024-09-11 19:56:41,328 INFO L87 Difference]: Start difference. First operand 424 states and 582 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-11 19:56:42,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:56:42,360 INFO L93 Difference]: Finished difference Result 442 states and 597 transitions. [2024-09-11 19:56:42,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-11 19:56:42,360 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 146 [2024-09-11 19:56:42,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:56:42,363 INFO L225 Difference]: With dead ends: 442 [2024-09-11 19:56:42,363 INFO L226 Difference]: Without dead ends: 440 [2024-09-11 19:56:42,364 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2024-09-11 19:56:42,364 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 20 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 19:56:42,365 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 299 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 19:56:42,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2024-09-11 19:56:42,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 402. [2024-09-11 19:56:42,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 220 states have (on average 1.1409090909090909) internal successors, (251), 224 states have internal predecessors, (251), 144 states have call successors, (144), 37 states have call predecessors, (144), 37 states have return successors, (143), 140 states have call predecessors, (143), 143 states have call successors, (143) [2024-09-11 19:56:42,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 538 transitions. [2024-09-11 19:56:42,712 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 538 transitions. Word has length 146 [2024-09-11 19:56:42,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:56:42,712 INFO L474 AbstractCegarLoop]: Abstraction has 402 states and 538 transitions. [2024-09-11 19:56:42,712 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-11 19:56:42,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:56:42,713 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 538 transitions. [2024-09-11 19:56:42,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-09-11 19:56:42,714 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:56:42,714 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:56:42,722 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-11 19:56:42,915 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:56:42,915 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:56:42,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:56:42,915 INFO L85 PathProgramCache]: Analyzing trace with hash 891540329, now seen corresponding path program 10 times [2024-09-11 19:56:42,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:56:42,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405122299] [2024-09-11 19:56:42,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:56:42,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:56:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:56:42,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353348654] [2024-09-11 19:56:42,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 19:56:42,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:56:42,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:56:42,938 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) [2024-09-11 19:56:42,941 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-11 19:56:43,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 19:56:43,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:56:43,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-11 19:56:43,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:56:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 97 proven. 73 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2024-09-11 19:56:44,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:56:44,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:56:44,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405122299] [2024-09-11 19:56:44,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:56:44,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353348654] [2024-09-11 19:56:44,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353348654] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:56:44,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:56:44,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-11 19:56:44,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651630219] [2024-09-11 19:56:44,341 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:56:44,341 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-11 19:56:44,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:56:44,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-11 19:56:44,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2024-09-11 19:56:44,342 INFO L87 Difference]: Start difference. First operand 402 states and 538 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-11 19:56:46,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:56:46,202 INFO L93 Difference]: Finished difference Result 443 states and 596 transitions. [2024-09-11 19:56:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-11 19:56:46,203 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) Word has length 149 [2024-09-11 19:56:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:56:46,206 INFO L225 Difference]: With dead ends: 443 [2024-09-11 19:56:46,206 INFO L226 Difference]: Without dead ends: 441 [2024-09-11 19:56:46,207 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2024-09-11 19:56:46,208 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 38 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:56:46,208 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 517 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-11 19:56:46,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2024-09-11 19:56:46,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 409. [2024-09-11 19:56:46,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 224 states have (on average 1.1383928571428572) internal successors, (255), 229 states have internal predecessors, (255), 147 states have call successors, (147), 37 states have call predecessors, (147), 37 states have return successors, (146), 142 states have call predecessors, (146), 146 states have call successors, (146) [2024-09-11 19:56:46,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 548 transitions. [2024-09-11 19:56:46,598 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 548 transitions. Word has length 149 [2024-09-11 19:56:46,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:56:46,598 INFO L474 AbstractCegarLoop]: Abstraction has 409 states and 548 transitions. [2024-09-11 19:56:46,599 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-11 19:56:46,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:56:46,599 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 548 transitions. [2024-09-11 19:56:46,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-09-11 19:56:46,600 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:56:46,600 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:56:46,617 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-11 19:56:46,801 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-11 19:56:46,801 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:56:46,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:56:46,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1751884981, now seen corresponding path program 11 times [2024-09-11 19:56:46,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:56:46,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368037812] [2024-09-11 19:56:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:56:46,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:56:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:56:46,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002145291] [2024-09-11 19:56:46,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 19:56:46,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:56:46,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:56:46,831 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) [2024-09-11 19:56:46,832 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-11 19:56:46,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-11 19:56:46,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:56:46,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-11 19:56:46,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:56:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 152 proven. 108 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2024-09-11 19:56:54,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:56:55,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:56:55,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368037812] [2024-09-11 19:56:55,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:56:55,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002145291] [2024-09-11 19:56:55,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002145291] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:56:55,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:56:55,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-11 19:56:55,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449526723] [2024-09-11 19:56:55,246 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:56:55,246 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 19:56:55,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:56:55,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 19:56:55,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2024-09-11 19:56:55,247 INFO L87 Difference]: Start difference. First operand 409 states and 548 transitions. Second operand has 21 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 11 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-11 19:57:02,931 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 [0] [2024-09-11 19:57:14,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:57:14,399 INFO L93 Difference]: Finished difference Result 450 states and 606 transitions. [2024-09-11 19:57:14,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-11 19:57:14,399 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 11 states have call predecessors, (25), 8 states have call successors, (25) Word has length 149 [2024-09-11 19:57:14,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:57:14,402 INFO L225 Difference]: With dead ends: 450 [2024-09-11 19:57:14,402 INFO L226 Difference]: Without dead ends: 448 [2024-09-11 19:57:14,402 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2024-09-11 19:57:14,403 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 36 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:57:14,403 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 636 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 881 Invalid, 1 Unknown, 0 Unchecked, 14.0s Time] [2024-09-11 19:57:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2024-09-11 19:57:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 409. [2024-09-11 19:57:14,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 224 states have (on average 1.1383928571428572) internal successors, (255), 229 states have internal predecessors, (255), 147 states have call successors, (147), 37 states have call predecessors, (147), 37 states have return successors, (146), 142 states have call predecessors, (146), 146 states have call successors, (146) [2024-09-11 19:57:14,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 548 transitions. [2024-09-11 19:57:14,807 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 548 transitions. Word has length 149 [2024-09-11 19:57:14,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:57:14,808 INFO L474 AbstractCegarLoop]: Abstraction has 409 states and 548 transitions. [2024-09-11 19:57:14,808 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 11 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-11 19:57:14,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:14,808 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 548 transitions. [2024-09-11 19:57:14,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-09-11 19:57:14,810 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:57:14,810 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:57:14,826 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-11 19:57:15,011 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-11 19:57:15,011 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:57:15,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:15,011 INFO L85 PathProgramCache]: Analyzing trace with hash -2122073176, now seen corresponding path program 12 times [2024-09-11 19:57:15,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:57:15,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30072103] [2024-09-11 19:57:15,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:57:15,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:57:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:57:15,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028257248] [2024-09-11 19:57:15,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 19:57:15,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:57:15,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:57:15,038 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) [2024-09-11 19:57:15,039 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-11 19:57:15,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-11 19:57:15,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:57:15,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-11 19:57:15,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:57:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 216 proven. 107 refuted. 0 times theorem prover too weak. 887 trivial. 0 not checked. [2024-09-11 19:57:16,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:57:29,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:57:29,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30072103] [2024-09-11 19:57:29,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:57:29,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028257248] [2024-09-11 19:57:29,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028257248] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:57:29,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:57:29,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-11 19:57:29,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891490205] [2024-09-11 19:57:29,064 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:57:29,064 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-11 19:57:29,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:57:29,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-11 19:57:29,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=648, Unknown=2, NotChecked=0, Total=756 [2024-09-11 19:57:29,065 INFO L87 Difference]: Start difference. First operand 409 states and 548 transitions. Second operand has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 8 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 10 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-11 19:57:30,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:57:30,907 INFO L93 Difference]: Finished difference Result 523 states and 718 transitions. [2024-09-11 19:57:30,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-11 19:57:30,908 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 8 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 10 states have call predecessors, (24), 7 states have call successors, (24) Word has length 171 [2024-09-11 19:57:30,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:57:30,911 INFO L225 Difference]: With dead ends: 523 [2024-09-11 19:57:30,911 INFO L226 Difference]: Without dead ends: 521 [2024-09-11 19:57:30,912 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=143, Invalid=847, Unknown=2, NotChecked=0, Total=992 [2024-09-11 19:57:30,912 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 18 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-11 19:57:30,912 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 612 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-11 19:57:30,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2024-09-11 19:57:31,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 482. [2024-09-11 19:57:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 257 states have (on average 1.1478599221789882) internal successors, (295), 262 states have internal predecessors, (295), 183 states have call successors, (183), 41 states have call predecessors, (183), 41 states have return successors, (182), 178 states have call predecessors, (182), 182 states have call successors, (182) [2024-09-11 19:57:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 660 transitions. [2024-09-11 19:57:31,426 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 660 transitions. Word has length 171 [2024-09-11 19:57:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:57:31,426 INFO L474 AbstractCegarLoop]: Abstraction has 482 states and 660 transitions. [2024-09-11 19:57:31,426 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 8 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 10 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-11 19:57:31,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 660 transitions. [2024-09-11 19:57:31,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-09-11 19:57:31,427 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:57:31,427 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:57:31,433 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-11 19:57:31,628 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-11 19:57:31,628 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:57:31,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:31,628 INFO L85 PathProgramCache]: Analyzing trace with hash 395202058, now seen corresponding path program 13 times [2024-09-11 19:57:31,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:57:31,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957676360] [2024-09-11 19:57:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:57:31,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:57:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:57:31,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764702157] [2024-09-11 19:57:31,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 19:57:31,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:57:31,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:57:31,657 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) [2024-09-11 19:57:31,658 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-11 19:57:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 19:57:31,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-11 19:57:31,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:57:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 217 proven. 116 refuted. 0 times theorem prover too weak. 877 trivial. 0 not checked. [2024-09-11 19:57:33,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:57:33,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:57:33,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957676360] [2024-09-11 19:57:33,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:57:33,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764702157] [2024-09-11 19:57:33,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764702157] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:57:33,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:57:33,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-11 19:57:33,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887543159] [2024-09-11 19:57:33,443 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:57:33,444 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-11 19:57:33,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:57:33,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-11 19:57:33,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2024-09-11 19:57:33,445 INFO L87 Difference]: Start difference. First operand 482 states and 660 transitions. Second operand has 23 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 12 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-11 19:57:35,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:57:35,354 INFO L93 Difference]: Finished difference Result 531 states and 724 transitions. [2024-09-11 19:57:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-11 19:57:35,354 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 12 states have call predecessors, (29), 10 states have call successors, (29) Word has length 171 [2024-09-11 19:57:35,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:57:35,357 INFO L225 Difference]: With dead ends: 531 [2024-09-11 19:57:35,357 INFO L226 Difference]: Without dead ends: 529 [2024-09-11 19:57:35,357 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2024-09-11 19:57:35,358 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-11 19:57:35,358 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 405 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-11 19:57:35,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2024-09-11 19:57:35,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 490. [2024-09-11 19:57:35,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 263 states have (on average 1.144486692015209) internal successors, (301), 268 states have internal predecessors, (301), 183 states have call successors, (183), 43 states have call predecessors, (183), 43 states have return successors, (182), 178 states have call predecessors, (182), 182 states have call successors, (182) [2024-09-11 19:57:35,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 666 transitions. [2024-09-11 19:57:35,966 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 666 transitions. Word has length 171 [2024-09-11 19:57:35,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:57:35,966 INFO L474 AbstractCegarLoop]: Abstraction has 490 states and 666 transitions. [2024-09-11 19:57:35,966 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 12 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-11 19:57:35,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 666 transitions. [2024-09-11 19:57:35,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-09-11 19:57:35,968 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:57:35,968 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:57:35,981 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-11 19:57:36,168 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-11 19:57:36,169 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:57:36,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:36,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2046744044, now seen corresponding path program 14 times [2024-09-11 19:57:36,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:57:36,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979904009] [2024-09-11 19:57:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:57:36,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:57:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:57:36,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078883458] [2024-09-11 19:57:36,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 19:57:36,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:57:36,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:57:36,201 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) [2024-09-11 19:57:36,203 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-11 19:57:36,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 19:57:36,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:57:36,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-11 19:57:36,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 19:57:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 116 proven. 148 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2024-09-11 19:57:37,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 19:57:37,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 19:57:37,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979904009] [2024-09-11 19:57:37,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 19:57:37,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078883458] [2024-09-11 19:57:37,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078883458] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 19:57:37,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 19:57:37,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-11 19:57:37,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412604597] [2024-09-11 19:57:37,522 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 19:57:37,522 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 19:57:37,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 19:57:37,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 19:57:37,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-09-11 19:57:37,523 INFO L87 Difference]: Start difference. First operand 490 states and 666 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-11 19:57:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 19:57:39,182 INFO L93 Difference]: Finished difference Result 563 states and 776 transitions. [2024-09-11 19:57:39,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-11 19:57:39,183 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 8 states have call successors, (29) Word has length 171 [2024-09-11 19:57:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 19:57:39,185 INFO L225 Difference]: With dead ends: 563 [2024-09-11 19:57:39,185 INFO L226 Difference]: Without dead ends: 561 [2024-09-11 19:57:39,186 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2024-09-11 19:57:39,186 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 34 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-11 19:57:39,186 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 673 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-11 19:57:39,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2024-09-11 19:57:39,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 502. [2024-09-11 19:57:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 269 states have (on average 1.1449814126394051) internal successors, (308), 273 states have internal predecessors, (308), 188 states have call successors, (188), 44 states have call predecessors, (188), 44 states have return successors, (187), 184 states have call predecessors, (187), 187 states have call successors, (187) [2024-09-11 19:57:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 683 transitions. [2024-09-11 19:57:39,726 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 683 transitions. Word has length 171 [2024-09-11 19:57:39,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 19:57:39,726 INFO L474 AbstractCegarLoop]: Abstraction has 502 states and 683 transitions. [2024-09-11 19:57:39,726 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 9 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-11 19:57:39,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 683 transitions. [2024-09-11 19:57:39,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2024-09-11 19:57:39,728 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 19:57:39,728 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 19:57:39,745 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-11 19:57:39,928 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:57:39,929 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 19:57:39,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 19:57:39,929 INFO L85 PathProgramCache]: Analyzing trace with hash -245184013, now seen corresponding path program 15 times [2024-09-11 19:57:39,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 19:57:39,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553282649] [2024-09-11 19:57:39,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 19:57:39,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 19:57:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 19:57:39,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63386836] [2024-09-11 19:57:39,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 19:57:39,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 19:57:39,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 19:57:39,955 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) [2024-09-11 19:57:39,965 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-11 19:57:40,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-11 19:57:40,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 19:57:40,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-11 19:57:40,235 INFO L285 TraceCheckSpWp]: Computing forward predicates...