./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 04d6fb36 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/prodbin-ll_unwindbound50.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 c54d9189042c7bc9bae976b882c7c0538c4797366038f58e7e5d207abe4f931e --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 19:38:20,074 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:38:20,142 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:38:20,149 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:38:20,149 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:38:20,178 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:38:20,178 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:38:20,178 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:38:20,179 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:38:20,179 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:38:20,179 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:38:20,180 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:38:20,180 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:38:20,180 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:38:20,181 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:38:20,181 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:38:20,181 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:38:20,181 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:38:20,182 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:38:20,182 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:38:20,182 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:38:20,182 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:38:20,183 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:38:20,183 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:38:20,183 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:38:20,183 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:38:20,184 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:38:20,184 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:38:20,184 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:38:20,184 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:38:20,185 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:38:20,185 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:38:20,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:38:20,185 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:38:20,186 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:38:20,186 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:38:20,186 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:38:20,186 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:38:20,187 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:38:20,187 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:38:20,187 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:38:20,188 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:38:20,188 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c54d9189042c7bc9bae976b882c7c0538c4797366038f58e7e5d207abe4f931e Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:38:20,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:38:20,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:38:20,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:38:20,456 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:38:20,457 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:38:20,459 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c [2024-09-15 19:38:21,908 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:38:22,066 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:38:22,067 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c [2024-09-15 19:38:22,077 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/8523a584a/3693e2c28ab34474a87a31ad951db927/FLAGf842c7f84 [2024-09-15 19:38:22,089 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/8523a584a/3693e2c28ab34474a87a31ad951db927 [2024-09-15 19:38:22,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:38:22,092 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:38:22,094 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:38:22,094 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:38:22,098 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:38:22,099 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:38:22" (1/1) ... [2024-09-15 19:38:22,099 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c2707ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:22, skipping insertion in model container [2024-09-15 19:38:22,099 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:38:22" (1/1) ... [2024-09-15 19:38:22,114 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:38:22,228 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c[1263,1276] [2024-09-15 19:38:22,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:38:22,251 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:38:22,260 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c[1263,1276] [2024-09-15 19:38:22,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:38:22,294 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:38:22,294 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:22 WrapperNode [2024-09-15 19:38:22,294 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:38:22,296 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:38:22,296 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:38:22,296 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:38:22,301 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:22" (1/1) ... [2024-09-15 19:38:22,305 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:22" (1/1) ... [2024-09-15 19:38:22,309 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:38:22,310 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:38:22,310 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:38:22,311 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:38:22,311 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:38:22,317 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:22" (1/1) ... [2024-09-15 19:38:22,317 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:22" (1/1) ... [2024-09-15 19:38:22,318 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:22" (1/1) ... [2024-09-15 19:38:22,328 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]. [2024-09-15 19:38:22,328 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:22" (1/1) ... [2024-09-15 19:38:22,328 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:22" (1/1) ... [2024-09-15 19:38:22,333 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:22" (1/1) ... [2024-09-15 19:38:22,335 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:22" (1/1) ... [2024-09-15 19:38:22,336 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:22" (1/1) ... [2024-09-15 19:38:22,337 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:22" (1/1) ... [2024-09-15 19:38:22,338 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:38:22,341 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:38:22,341 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:38:22,341 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:38:22,341 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:22" (1/1) ... [2024-09-15 19:38:22,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:38:22,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:38:22,368 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) [2024-09-15 19:38:22,373 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 [2024-09-15 19:38:22,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:38:22,406 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:38:22,407 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:38:22,407 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:38:22,407 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:38:22,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:38:22,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:38:22,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:38:22,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:38:22,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:38:22,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:38:22,409 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:38:22,458 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:38:22,460 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:38:22,601 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-15 19:38:22,601 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:38:22,623 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:38:22,623 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-15 19:38:22,624 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:38:22 BoogieIcfgContainer [2024-09-15 19:38:22,624 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:38:22,625 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:38:22,625 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:38:22,628 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:38:22,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:38:22" (1/3) ... [2024-09-15 19:38:22,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efe662e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:38:22, skipping insertion in model container [2024-09-15 19:38:22,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:22" (2/3) ... [2024-09-15 19:38:22,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efe662e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:38:22, skipping insertion in model container [2024-09-15 19:38:22,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:38:22" (3/3) ... [2024-09-15 19:38:22,631 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound50.c [2024-09-15 19:38:22,643 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:38:22,643 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:38:22,694 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:38:22,700 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;@6bef8fea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:38:22,701 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:38:22,704 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-15 19:38:22,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-15 19:38:22,709 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:22,710 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:22,710 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:22,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:22,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1841004279, now seen corresponding path program 1 times [2024-09-15 19:38:22,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:22,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458497048] [2024-09-15 19:38:22,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:22,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:22,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:38:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:22,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:38:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:38:22,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:22,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458497048] [2024-09-15 19:38:22,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458497048] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:38:22,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:38:22,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 19:38:22,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298872895] [2024-09-15 19:38:22,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:38:22,879 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-15 19:38:22,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:38:22,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-15 19:38:22,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 19:38:22,899 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:38:22,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:38:22,966 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2024-09-15 19:38:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-15 19:38:22,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-15 19:38:22,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:38:22,974 INFO L225 Difference]: With dead ends: 49 [2024-09-15 19:38:22,974 INFO L226 Difference]: Without dead ends: 25 [2024-09-15 19:38:22,977 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 19:38:22,980 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:38:22,981 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:38:22,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-15 19:38:23,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-09-15 19:38:23,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-15 19:38:23,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-09-15 19:38:23,015 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2024-09-15 19:38:23,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:38:23,016 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-09-15 19:38:23,016 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:38:23,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:23,018 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-09-15 19:38:23,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-15 19:38:23,018 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:23,019 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:23,019 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:38:23,021 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:23,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:23,022 INFO L85 PathProgramCache]: Analyzing trace with hash 233646544, now seen corresponding path program 1 times [2024-09-15 19:38:23,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:23,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360602731] [2024-09-15 19:38:23,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:23,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:23,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:38:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:23,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:38:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:38:23,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:23,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360602731] [2024-09-15 19:38:23,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360602731] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:38:23,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:38:23,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:38:23,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328694481] [2024-09-15 19:38:23,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:38:23,251 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:38:23,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:38:23,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:38:23,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:38:23,252 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 19:38:23,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:38:23,305 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2024-09-15 19:38:23,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 19:38:23,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-09-15 19:38:23,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:38:23,307 INFO L225 Difference]: With dead ends: 33 [2024-09-15 19:38:23,307 INFO L226 Difference]: Without dead ends: 26 [2024-09-15 19:38:23,307 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:38:23,308 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:38:23,308 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 43 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:38:23,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-15 19:38:23,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-15 19:38:23,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-15 19:38:23,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-09-15 19:38:23,314 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2024-09-15 19:38:23,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:38:23,314 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-09-15 19:38:23,314 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 19:38:23,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:23,315 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-09-15 19:38:23,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-15 19:38:23,315 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:23,316 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:23,316 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 19:38:23,316 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:23,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:23,316 INFO L85 PathProgramCache]: Analyzing trace with hash 235434004, now seen corresponding path program 1 times [2024-09-15 19:38:23,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:23,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481323663] [2024-09-15 19:38:23,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:23,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:38:23,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567781623] [2024-09-15 19:38:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:23,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:23,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:38:23,329 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) [2024-09-15 19:38:23,331 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 19:38:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:23,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 19:38:23,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:38:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:38:23,501 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:38:23,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:23,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481323663] [2024-09-15 19:38:23,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:38:23,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567781623] [2024-09-15 19:38:23,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567781623] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:38:23,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:38:23,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-15 19:38:23,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418326538] [2024-09-15 19:38:23,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:38:23,503 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:38:23,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:38:23,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:38:23,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:38:23,505 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:38:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:38:23,574 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2024-09-15 19:38:23,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:38:23,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-09-15 19:38:23,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:38:23,576 INFO L225 Difference]: With dead ends: 41 [2024-09-15 19:38:23,576 INFO L226 Difference]: Without dead ends: 34 [2024-09-15 19:38:23,576 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-15 19:38:23,577 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:38:23,577 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 103 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:38:23,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-15 19:38:23,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-09-15 19:38:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-15 19:38:23,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2024-09-15 19:38:23,585 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 17 [2024-09-15 19:38:23,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:38:23,585 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2024-09-15 19:38:23,585 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:38:23,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:23,586 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2024-09-15 19:38:23,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-15 19:38:23,587 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:23,587 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:23,600 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 19:38:23,791 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:23,792 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:23,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:23,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1090652054, now seen corresponding path program 1 times [2024-09-15 19:38:23,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:23,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726351196] [2024-09-15 19:38:23,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:23,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:23,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:38:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:23,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:38:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:23,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-15 19:38:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:38:23,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:23,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726351196] [2024-09-15 19:38:23,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726351196] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:38:23,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173740582] [2024-09-15 19:38:23,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:23,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:23,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:38:23,968 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) [2024-09-15 19:38:23,972 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 19:38:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:24,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 19:38:24,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:38:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:38:24,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:38:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:38:24,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173740582] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:38:24,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:38:24,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-09-15 19:38:24,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351153499] [2024-09-15 19:38:24,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:38:24,132 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-15 19:38:24,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:38:24,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-15 19:38:24,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:38:24,134 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 7 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-15 19:38:24,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:38:24,270 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2024-09-15 19:38:24,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-15 19:38:24,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 7 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 27 [2024-09-15 19:38:24,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:38:24,271 INFO L225 Difference]: With dead ends: 69 [2024-09-15 19:38:24,271 INFO L226 Difference]: Without dead ends: 62 [2024-09-15 19:38:24,272 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-09-15 19:38:24,272 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:38:24,273 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 81 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:38:24,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-15 19:38:24,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2024-09-15 19:38:24,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 44 states have internal predecessors, (52), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-15 19:38:24,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-09-15 19:38:24,282 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 27 [2024-09-15 19:38:24,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:38:24,283 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-09-15 19:38:24,283 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 7 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-15 19:38:24,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:24,283 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-09-15 19:38:24,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-15 19:38:24,284 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:24,284 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:24,299 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-15 19:38:24,484 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:24,485 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:24,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:24,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1088864594, now seen corresponding path program 1 times [2024-09-15 19:38:24,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:24,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245929476] [2024-09-15 19:38:24,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:24,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:38:24,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032890059] [2024-09-15 19:38:24,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:24,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:24,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:38:24,518 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) [2024-09-15 19:38:24,521 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 19:38:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:24,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-15 19:38:24,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:38:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:38:24,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:38:28,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:38:28,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:28,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245929476] [2024-09-15 19:38:28,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:38:28,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032890059] [2024-09-15 19:38:28,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032890059] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:38:28,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:38:28,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2024-09-15 19:38:28,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101550534] [2024-09-15 19:38:28,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:38:28,148 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-15 19:38:28,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:38:28,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-15 19:38:28,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-15 19:38:28,150 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:38:28,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:38:28,459 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2024-09-15 19:38:28,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-15 19:38:28,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-15 19:38:28,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:38:28,463 INFO L225 Difference]: With dead ends: 91 [2024-09-15 19:38:28,463 INFO L226 Difference]: Without dead ends: 89 [2024-09-15 19:38:28,464 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-09-15 19:38:28,464 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:38:28,465 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 173 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:38:28,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-15 19:38:28,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2024-09-15 19:38:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.21875) internal successors, (78), 69 states have internal predecessors, (78), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-15 19:38:28,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2024-09-15 19:38:28,489 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 27 [2024-09-15 19:38:28,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:38:28,490 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2024-09-15 19:38:28,490 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:38:28,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:28,490 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2024-09-15 19:38:28,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-15 19:38:28,491 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:28,491 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:28,504 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-15 19:38:28,692 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:28,693 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:28,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:28,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1898211220, now seen corresponding path program 1 times [2024-09-15 19:38:28,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:28,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834161121] [2024-09-15 19:38:28,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:28,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:38:28,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472701202] [2024-09-15 19:38:28,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:28,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:28,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:38:28,719 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) [2024-09-15 19:38:28,720 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 19:38:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:28,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-15 19:38:28,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:38:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:38:29,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:38:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:38:29,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:29,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834161121] [2024-09-15 19:38:29,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:38:29,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472701202] [2024-09-15 19:38:29,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472701202] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:38:29,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:38:29,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-09-15 19:38:29,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090089735] [2024-09-15 19:38:29,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:38:29,414 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 19:38:29,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:38:29,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 19:38:29,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-09-15 19:38:29,415 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-15 19:38:29,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:38:29,698 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2024-09-15 19:38:29,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 19:38:29,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2024-09-15 19:38:29,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:38:29,700 INFO L225 Difference]: With dead ends: 138 [2024-09-15 19:38:29,700 INFO L226 Difference]: Without dead ends: 127 [2024-09-15 19:38:29,701 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2024-09-15 19:38:29,701 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:38:29,701 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 173 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:38:29,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-15 19:38:29,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 90. [2024-09-15 19:38:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-15 19:38:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2024-09-15 19:38:29,721 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 27 [2024-09-15 19:38:29,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:38:29,721 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2024-09-15 19:38:29,721 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-15 19:38:29,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:29,721 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2024-09-15 19:38:29,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-15 19:38:29,722 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:29,722 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:29,743 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-15 19:38:29,922 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:29,923 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:29,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:29,923 INFO L85 PathProgramCache]: Analyzing trace with hash 2085342267, now seen corresponding path program 1 times [2024-09-15 19:38:29,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:29,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408166573] [2024-09-15 19:38:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:29,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:38:29,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035202771] [2024-09-15 19:38:29,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:29,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:29,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:38:29,940 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) [2024-09-15 19:38:29,941 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 19:38:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:29,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 19:38:29,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:38:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:38:30,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:38:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:38:30,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:30,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408166573] [2024-09-15 19:38:30,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:38:30,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035202771] [2024-09-15 19:38:30,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035202771] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:38:30,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:38:30,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-09-15 19:38:30,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343269676] [2024-09-15 19:38:30,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:38:30,082 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-15 19:38:30,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:38:30,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-15 19:38:30,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:38:30,083 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-15 19:38:30,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:38:30,165 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2024-09-15 19:38:30,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:38:30,166 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-09-15 19:38:30,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:38:30,167 INFO L225 Difference]: With dead ends: 99 [2024-09-15 19:38:30,167 INFO L226 Difference]: Without dead ends: 89 [2024-09-15 19:38:30,167 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-09-15 19:38:30,168 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:38:30,168 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 108 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:38:30,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-15 19:38:30,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2024-09-15 19:38:30,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 68 states have internal predecessors, (75), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-15 19:38:30,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2024-09-15 19:38:30,185 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 33 [2024-09-15 19:38:30,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:38:30,185 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2024-09-15 19:38:30,185 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-15 19:38:30,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:30,186 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2024-09-15 19:38:30,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-15 19:38:30,186 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:30,187 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:30,205 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 19:38:30,390 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-15 19:38:30,391 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:30,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:30,391 INFO L85 PathProgramCache]: Analyzing trace with hash -134747104, now seen corresponding path program 1 times [2024-09-15 19:38:30,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:30,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252159520] [2024-09-15 19:38:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:30,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:38:30,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713162519] [2024-09-15 19:38:30,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:30,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:30,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:38:30,413 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) [2024-09-15 19:38:30,414 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 19:38:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:30,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-15 19:38:30,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:38:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 19:38:31,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:38:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-15 19:38:31,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:31,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252159520] [2024-09-15 19:38:31,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:38:31,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713162519] [2024-09-15 19:38:31,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713162519] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:38:31,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:38:31,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 23 [2024-09-15 19:38:31,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907465332] [2024-09-15 19:38:31,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:38:31,895 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-15 19:38:31,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:38:31,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-15 19:38:31,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2024-09-15 19:38:31,896 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-15 19:38:33,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:38:33,506 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2024-09-15 19:38:33,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-15 19:38:33,506 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2024-09-15 19:38:33,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:38:33,507 INFO L225 Difference]: With dead ends: 141 [2024-09-15 19:38:33,508 INFO L226 Difference]: Without dead ends: 139 [2024-09-15 19:38:33,512 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2024-09-15 19:38:33,512 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 25 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 19:38:33,513 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 337 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 349 Invalid, 1 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 19:38:33,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-15 19:38:33,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2024-09-15 19:38:33,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 110 states have internal predecessors, (121), 19 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-15 19:38:33,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 157 transitions. [2024-09-15 19:38:33,559 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 157 transitions. Word has length 47 [2024-09-15 19:38:33,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:38:33,559 INFO L474 AbstractCegarLoop]: Abstraction has 135 states and 157 transitions. [2024-09-15 19:38:33,559 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 21 states have internal predecessors, (51), 7 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-15 19:38:33,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:33,559 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 157 transitions. [2024-09-15 19:38:33,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-15 19:38:33,561 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:33,561 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:33,577 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-15 19:38:33,766 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:33,766 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:33,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:33,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2108223176, now seen corresponding path program 2 times [2024-09-15 19:38:33,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:33,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712630132] [2024-09-15 19:38:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:33,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:33,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:38:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:33,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:38:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:33,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-15 19:38:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:33,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:38:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:33,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:38:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:33,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-15 19:38:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 19:38:33,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:33,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712630132] [2024-09-15 19:38:33,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712630132] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:38:33,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166270933] [2024-09-15 19:38:33,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:38:33,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:33,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:38:33,958 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) [2024-09-15 19:38:33,961 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 19:38:34,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:38:34,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:38:34,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-15 19:38:34,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:38:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:38:34,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:38:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 19:38:34,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166270933] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:38:34,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:38:34,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2024-09-15 19:38:34,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451529087] [2024-09-15 19:38:34,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:38:34,248 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-15 19:38:34,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:38:34,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-15 19:38:34,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2024-09-15 19:38:34,249 INFO L87 Difference]: Start difference. First operand 135 states and 157 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 16 states have internal predecessors, (79), 13 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2024-09-15 19:38:34,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:38:34,563 INFO L93 Difference]: Finished difference Result 315 states and 366 transitions. [2024-09-15 19:38:34,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-15 19:38:34,564 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 16 states have internal predecessors, (79), 13 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) Word has length 57 [2024-09-15 19:38:34,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:38:34,566 INFO L225 Difference]: With dead ends: 315 [2024-09-15 19:38:34,566 INFO L226 Difference]: Without dead ends: 308 [2024-09-15 19:38:34,566 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2024-09-15 19:38:34,567 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 114 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:38:34,567 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 102 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:38:34,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-09-15 19:38:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 298. [2024-09-15 19:38:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 233 states have (on average 1.1330472103004292) internal successors, (264), 244 states have internal predecessors, (264), 36 states have call successors, (36), 29 states have call predecessors, (36), 28 states have return successors, (34), 24 states have call predecessors, (34), 34 states have call successors, (34) [2024-09-15 19:38:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 334 transitions. [2024-09-15 19:38:34,641 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 334 transitions. Word has length 57 [2024-09-15 19:38:34,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:38:34,641 INFO L474 AbstractCegarLoop]: Abstraction has 298 states and 334 transitions. [2024-09-15 19:38:34,641 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 16 states have internal predecessors, (79), 13 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2024-09-15 19:38:34,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:34,642 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 334 transitions. [2024-09-15 19:38:34,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-15 19:38:34,643 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:34,643 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:34,656 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-15 19:38:34,847 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:34,848 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:34,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:34,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1644319050, now seen corresponding path program 2 times [2024-09-15 19:38:34,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:34,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593085689] [2024-09-15 19:38:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:34,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:38:34,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129325632] [2024-09-15 19:38:34,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:38:34,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:34,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:38:34,891 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) [2024-09-15 19:38:34,897 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 19:38:34,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:38:34,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:38:34,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-15 19:38:34,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:38:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 59 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:38:37,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:38:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 19:38:54,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:54,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593085689] [2024-09-15 19:38:54,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:38:54,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129325632] [2024-09-15 19:38:54,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129325632] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:38:54,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:38:54,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 27 [2024-09-15 19:38:54,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866208358] [2024-09-15 19:38:54,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:38:54,913 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-15 19:38:54,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:38:54,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-15 19:38:54,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2024-09-15 19:38:54,914 INFO L87 Difference]: Start difference. First operand 298 states and 334 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 25 states have internal predecessors, (62), 9 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-15 19:39:01,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-15 19:39:14,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:39:16,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:39:20,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:39:27,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:39:27,275 INFO L93 Difference]: Finished difference Result 424 states and 487 transitions. [2024-09-15 19:39:27,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-15 19:39:27,276 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 25 states have internal predecessors, (62), 9 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 57 [2024-09-15 19:39:27,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:39:27,278 INFO L225 Difference]: With dead ends: 424 [2024-09-15 19:39:27,278 INFO L226 Difference]: Without dead ends: 422 [2024-09-15 19:39:27,279 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2024-09-15 19:39:27,280 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 55 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 31 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2024-09-15 19:39:27,280 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 323 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 451 Invalid, 1 Unknown, 0 Unchecked, 15.8s Time] [2024-09-15 19:39:27,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2024-09-15 19:39:27,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 419. [2024-09-15 19:39:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 332 states have (on average 1.1355421686746987) internal successors, (377), 343 states have internal predecessors, (377), 51 states have call successors, (51), 36 states have call predecessors, (51), 35 states have return successors, (49), 39 states have call predecessors, (49), 49 states have call successors, (49) [2024-09-15 19:39:27,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 477 transitions. [2024-09-15 19:39:27,400 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 477 transitions. Word has length 57 [2024-09-15 19:39:27,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:39:27,401 INFO L474 AbstractCegarLoop]: Abstraction has 419 states and 477 transitions. [2024-09-15 19:39:27,401 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 25 states have internal predecessors, (62), 9 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-15 19:39:27,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:39:27,402 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 477 transitions. [2024-09-15 19:39:27,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-15 19:39:27,404 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:39:27,404 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:39:27,419 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-15 19:39:27,604 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:39:27,605 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:39:27,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:39:27,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1819634904, now seen corresponding path program 3 times [2024-09-15 19:39:27,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:39:27,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559194436] [2024-09-15 19:39:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:39:27,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:39:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:39:27,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841482877] [2024-09-15 19:39:27,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 19:39:27,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:39:27,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:39:27,693 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) [2024-09-15 19:39:27,693 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 19:39:27,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-15 19:39:27,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:39:27,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-15 19:39:27,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:39:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 118 proven. 9 refuted. 3 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-15 19:39:38,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:39:45,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:39:45,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559194436] [2024-09-15 19:39:45,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:39:45,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841482877] [2024-09-15 19:39:45,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841482877] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:39:45,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:39:45,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-15 19:39:45,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686597614] [2024-09-15 19:39:45,548 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:39:45,548 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-15 19:39:45,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:39:45,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-15 19:39:45,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=491, Unknown=1, NotChecked=0, Total=650 [2024-09-15 19:39:45,549 INFO L87 Difference]: Start difference. First operand 419 states and 477 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-15 19:39:52,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.66s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:39:59,596 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] [2024-09-15 19:40:02,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:40:02,995 INFO L93 Difference]: Finished difference Result 655 states and 753 transitions. [2024-09-15 19:40:02,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-15 19:40:02,996 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 77 [2024-09-15 19:40:02,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:40:02,999 INFO L225 Difference]: With dead ends: 655 [2024-09-15 19:40:02,999 INFO L226 Difference]: Without dead ends: 653 [2024-09-15 19:40:03,000 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=241, Invalid=688, Unknown=1, NotChecked=0, Total=930 [2024-09-15 19:40:03,000 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 18 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2024-09-15 19:40:03,000 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 268 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 285 Invalid, 2 Unknown, 0 Unchecked, 12.8s Time] [2024-09-15 19:40:03,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2024-09-15 19:40:03,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 209. [2024-09-15 19:40:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 164 states have (on average 1.1341463414634145) internal successors, (186), 165 states have internal predecessors, (186), 23 states have call successors, (23), 22 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-15 19:40:03,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 230 transitions. [2024-09-15 19:40:03,111 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 230 transitions. Word has length 77 [2024-09-15 19:40:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:40:03,112 INFO L474 AbstractCegarLoop]: Abstraction has 209 states and 230 transitions. [2024-09-15 19:40:03,112 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-15 19:40:03,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:40:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 230 transitions. [2024-09-15 19:40:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-09-15 19:40:03,113 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:40:03,113 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:40:03,126 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-15 19:40:03,317 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-15 19:40:03,317 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:40:03,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:40:03,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1188109524, now seen corresponding path program 2 times [2024-09-15 19:40:03,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:40:03,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825497984] [2024-09-15 19:40:03,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:40:03,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:40:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:40:03,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [238353643] [2024-09-15 19:40:03,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:40:03,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:40:03,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:40:03,366 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) [2024-09-15 19:40:03,367 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-15 19:40:03,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:40:03,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:40:03,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-15 19:40:03,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:40:28,901 WARN L249 Executor]: External (MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-09-15 19:40:28,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:40:28,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825497984] [2024-09-15 19:40:28,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:40:28,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238353643] [2024-09-15 19:40:28,902 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-09-15 19:40:28,906 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-09-15 19:40:28,916 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-15 19:40:29,102 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-15 19:40:29,103 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:86) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:915) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:789) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:377) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:579) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:298) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:110) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:210) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:410) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:327) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:421) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 45 more [2024-09-15 19:40:29,106 INFO L158 Benchmark]: Toolchain (without parser) took 127014.07ms. Allocated memory was 94.4MB in the beginning and 299.9MB in the end (delta: 205.5MB). Free memory was 57.4MB in the beginning and 246.9MB in the end (delta: -189.5MB). Peak memory consumption was 17.1MB. Max. memory is 16.1GB. [2024-09-15 19:40:29,106 INFO L158 Benchmark]: CDTParser took 1.10ms. Allocated memory is still 94.4MB. Free memory is still 76.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 19:40:29,106 INFO L158 Benchmark]: CACSL2BoogieTranslator took 200.41ms. Allocated memory is still 94.4MB. Free memory was 57.2MB in the beginning and 73.7MB in the end (delta: -16.5MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. [2024-09-15 19:40:29,107 INFO L158 Benchmark]: Boogie Procedure Inliner took 14.57ms. Allocated memory is still 94.4MB. Free memory was 73.7MB in the beginning and 72.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-15 19:40:29,107 INFO L158 Benchmark]: Boogie Preprocessor took 30.30ms. Allocated memory is still 94.4MB. Free memory was 72.4MB in the beginning and 71.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 19:40:29,108 INFO L158 Benchmark]: RCFGBuilder took 283.00ms. Allocated memory is still 94.4MB. Free memory was 70.7MB in the beginning and 58.4MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-15 19:40:29,109 INFO L158 Benchmark]: TraceAbstraction took 126480.70ms. Allocated memory was 94.4MB in the beginning and 299.9MB in the end (delta: 205.5MB). Free memory was 57.8MB in the beginning and 246.9MB in the end (delta: -189.1MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. [2024-09-15 19:40:29,110 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.10ms. Allocated memory is still 94.4MB. Free memory is still 76.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 200.41ms. Allocated memory is still 94.4MB. Free memory was 57.2MB in the beginning and 73.7MB in the end (delta: -16.5MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 14.57ms. Allocated memory is still 94.4MB. Free memory was 73.7MB in the beginning and 72.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.30ms. Allocated memory is still 94.4MB. Free memory was 72.4MB in the beginning and 71.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 283.00ms. Allocated memory is still 94.4MB. Free memory was 70.7MB in the beginning and 58.4MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 126480.70ms. Allocated memory was 94.4MB in the beginning and 299.9MB in the end (delta: 205.5MB). Free memory was 57.8MB in the beginning and 246.9MB in the end (delta: -189.1MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/prodbin-ll_unwindbound50.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Bitvector.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 c54d9189042c7bc9bae976b882c7c0538c4797366038f58e7e5d207abe4f931e --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 19:40:30,802 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:40:30,879 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-09-15 19:40:30,884 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:40:30,886 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:40:30,910 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:40:30,911 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:40:30,912 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:40:30,912 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:40:30,913 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:40:30,914 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:40:30,914 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:40:30,914 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:40:30,917 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:40:30,917 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:40:30,917 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:40:30,917 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:40:30,918 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:40:30,918 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:40:30,918 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:40:30,918 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:40:30,918 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:40:30,919 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:40:30,919 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-09-15 19:40:30,921 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-09-15 19:40:30,921 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:40:30,921 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-09-15 19:40:30,921 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:40:30,921 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:40:30,921 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:40:30,922 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:40:30,922 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:40:30,922 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:40:30,922 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:40:30,922 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:40:30,922 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:40:30,922 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:40:30,923 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:40:30,923 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-09-15 19:40:30,923 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-09-15 19:40:30,923 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:40:30,923 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:40:30,923 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:40:30,924 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:40:30,924 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-09-15 19:40:30,924 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c54d9189042c7bc9bae976b882c7c0538c4797366038f58e7e5d207abe4f931e Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:40:31,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:40:31,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:40:31,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:40:31,189 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:40:31,190 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:40:31,190 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c [2024-09-15 19:40:32,496 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:40:32,639 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:40:32,639 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c [2024-09-15 19:40:32,645 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/1584192cd/32405432e9e54f48b4a9dac3d3eb6b77/FLAGc3020c7ab [2024-09-15 19:40:32,655 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/1584192cd/32405432e9e54f48b4a9dac3d3eb6b77 [2024-09-15 19:40:32,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:40:32,658 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:40:32,659 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:40:32,659 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:40:32,662 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:40:32,663 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:40:32" (1/1) ... [2024-09-15 19:40:32,663 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cb68205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:40:32, skipping insertion in model container [2024-09-15 19:40:32,664 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:40:32" (1/1) ... [2024-09-15 19:40:32,677 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:40:32,806 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c[1263,1276] [2024-09-15 19:40:32,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:40:32,868 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:40:32,877 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound50.c[1263,1276] [2024-09-15 19:40:32,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:40:32,902 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:40:32,902 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:40:32 WrapperNode [2024-09-15 19:40:32,902 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:40:32,903 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:40:32,903 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:40:32,904 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:40:32,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:40:32" (1/1) ... [2024-09-15 19:40:32,914 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:40:32" (1/1) ... [2024-09-15 19:40:32,918 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:40:32,918 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:40:32,919 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:40:32,919 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:40:32,919 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:40:32,925 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:40:32" (1/1) ... [2024-09-15 19:40:32,926 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:40:32" (1/1) ... [2024-09-15 19:40:32,927 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:40:32" (1/1) ... [2024-09-15 19:40:32,940 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]. [2024-09-15 19:40:32,940 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:40:32" (1/1) ... [2024-09-15 19:40:32,940 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:40:32" (1/1) ... [2024-09-15 19:40:32,947 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:40:32" (1/1) ... [2024-09-15 19:40:32,950 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:40:32" (1/1) ... [2024-09-15 19:40:32,954 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:40:32" (1/1) ... [2024-09-15 19:40:32,954 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:40:32" (1/1) ... [2024-09-15 19:40:32,955 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:40:32,957 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:40:32,957 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:40:32,957 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:40:32,957 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:40:32" (1/1) ... [2024-09-15 19:40:32,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:40:32,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:40:32,984 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) [2024-09-15 19:40:32,989 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 [2024-09-15 19:40:33,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:40:33,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-09-15 19:40:33,020 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:40:33,020 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:40:33,021 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:40:33,022 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:40:33,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:40:33,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:40:33,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:40:33,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:40:33,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:40:33,022 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:40:33,076 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:40:33,078 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:40:33,221 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-15 19:40:33,221 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:40:33,247 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:40:33,248 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-15 19:40:33,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:40:33 BoogieIcfgContainer [2024-09-15 19:40:33,249 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:40:33,250 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:40:33,251 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:40:33,253 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:40:33,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:40:32" (1/3) ... [2024-09-15 19:40:33,254 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30489707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:40:33, skipping insertion in model container [2024-09-15 19:40:33,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:40:32" (2/3) ... [2024-09-15 19:40:33,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30489707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:40:33, skipping insertion in model container [2024-09-15 19:40:33,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:40:33" (3/3) ... [2024-09-15 19:40:33,256 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound50.c [2024-09-15 19:40:33,268 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:40:33,269 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:40:33,312 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:40:33,317 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;@33e70b00, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:40:33,317 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:40:33,321 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-15 19:40:33,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-15 19:40:33,326 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:40:33,327 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:40:33,327 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:40:33,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:40:33,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1841004279, now seen corresponding path program 1 times [2024-09-15 19:40:33,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-15 19:40:33,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466115907] [2024-09-15 19:40:33,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:40:33,341 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-15 19:40:33,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-15 19:40:33,344 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-15 19:40:33,345 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-09-15 19:40:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:40:33,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-09-15 19:40:33,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:40:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:40:33,436 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:40:33,436 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-15 19:40:33,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466115907] [2024-09-15 19:40:33,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466115907] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:40:33,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:40:33,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 19:40:33,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616246921] [2024-09-15 19:40:33,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:40:33,442 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-15 19:40:33,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-15 19:40:33,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-15 19:40:33,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:40:33,462 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:40:33,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:40:33,490 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2024-09-15 19:40:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-15 19:40:33,492 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-15 19:40:33,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:40:33,499 INFO L225 Difference]: With dead ends: 48 [2024-09-15 19:40:33,499 INFO L226 Difference]: Without dead ends: 24 [2024-09-15 19:40:33,502 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:40:33,504 INFO L434 NwaCegarLoop]: 29 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, 29 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 [2024-09-15 19:40:33,506 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:40:33,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-15 19:40:33,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-15 19:40:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-15 19:40:33,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-09-15 19:40:33,535 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2024-09-15 19:40:33,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:40:33,536 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-09-15 19:40:33,537 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:40:33,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:40:33,538 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-09-15 19:40:33,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-15 19:40:33,538 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:40:33,539 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:40:33,543 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2024-09-15 19:40:33,739 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-15 19:40:33,740 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:40:33,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:40:33,740 INFO L85 PathProgramCache]: Analyzing trace with hash 233646544, now seen corresponding path program 1 times [2024-09-15 19:40:33,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-15 19:40:33,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110097729] [2024-09-15 19:40:33,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:40:33,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-15 19:40:33,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-15 19:40:33,745 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-15 19:40:33,746 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-09-15 19:40:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:40:33,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-15 19:40:33,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:40:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:40:33,858 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:40:33,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-15 19:40:33,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110097729] [2024-09-15 19:40:33,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110097729] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:40:33,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:40:33,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-15 19:40:33,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436788247] [2024-09-15 19:40:33,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:40:33,862 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-15 19:40:33,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-15 19:40:33,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-15 19:40:33,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-15 19:40:33,863 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 19:40:33,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:40:33,888 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2024-09-15 19:40:33,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-15 19:40:33,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-09-15 19:40:33,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:40:33,889 INFO L225 Difference]: With dead ends: 33 [2024-09-15 19:40:33,889 INFO L226 Difference]: Without dead ends: 26 [2024-09-15 19:40:33,889 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-15 19:40:33,890 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:40:33,890 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:40:33,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-15 19:40:33,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-15 19:40:33,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-15 19:40:33,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-09-15 19:40:33,900 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2024-09-15 19:40:33,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:40:33,900 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-09-15 19:40:33,900 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 19:40:33,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:40:33,901 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-09-15 19:40:33,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-15 19:40:33,901 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:40:33,901 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:40:33,906 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-09-15 19:40:34,102 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-15 19:40:34,103 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:40:34,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:40:34,103 INFO L85 PathProgramCache]: Analyzing trace with hash 235434004, now seen corresponding path program 1 times [2024-09-15 19:40:34,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-15 19:40:34,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280219141] [2024-09-15 19:40:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:40:34,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-15 19:40:34,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-15 19:40:34,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-15 19:40:34,107 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-09-15 19:40:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:40:34,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-15 19:40:34,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:40:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:40:34,448 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:40:34,448 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-15 19:40:34,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280219141] [2024-09-15 19:40:34,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280219141] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:40:34,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:40:34,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:40:34,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806709924] [2024-09-15 19:40:34,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:40:34,448 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:40:34,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-15 19:40:34,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:40:34,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:40:34,449 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:40:34,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:40:34,721 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2024-09-15 19:40:34,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:40:34,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-09-15 19:40:34,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:40:34,722 INFO L225 Difference]: With dead ends: 36 [2024-09-15 19:40:34,722 INFO L226 Difference]: Without dead ends: 34 [2024-09-15 19:40:34,723 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:40:34,723 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:40:34,724 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 72 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 19:40:34,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-15 19:40:34,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2024-09-15 19:40:34,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-15 19:40:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-09-15 19:40:34,729 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 17 [2024-09-15 19:40:34,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:40:34,729 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-09-15 19:40:34,730 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:40:34,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:40:34,730 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-09-15 19:40:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-15 19:40:34,733 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:40:34,733 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:40:34,742 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-09-15 19:40:34,937 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-15 19:40:34,938 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:40:34,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:40:34,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1056057055, now seen corresponding path program 1 times [2024-09-15 19:40:34,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-15 19:40:34,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088056187] [2024-09-15 19:40:34,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:40:34,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-15 19:40:34,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-15 19:40:34,942 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-15 19:40:34,943 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-09-15 19:40:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:40:35,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-15 19:40:35,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:40:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:40:35,121 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:40:35,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-15 19:40:35,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088056187] [2024-09-15 19:40:35,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088056187] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:40:35,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:40:35,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-15 19:40:35,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553067221] [2024-09-15 19:40:35,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:40:35,122 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 19:40:35,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-15 19:40:35,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 19:40:35,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:40:35,123 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:40:37,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:40:37,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:40:37,111 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2024-09-15 19:40:37,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 19:40:37,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-09-15 19:40:37,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:40:37,112 INFO L225 Difference]: With dead ends: 41 [2024-09-15 19:40:37,112 INFO L226 Difference]: Without dead ends: 34 [2024-09-15 19:40:37,112 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-15 19:40:37,113 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:40:37,113 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 85 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2024-09-15 19:40:37,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-15 19:40:37,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-09-15 19:40:37,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-15 19:40:37,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2024-09-15 19:40:37,120 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2024-09-15 19:40:37,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:40:37,120 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2024-09-15 19:40:37,120 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:40:37,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:40:37,121 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2024-09-15 19:40:37,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-15 19:40:37,121 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:40:37,122 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:40:37,127 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-09-15 19:40:37,325 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-15 19:40:37,326 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:40:37,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:40:37,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1090652054, now seen corresponding path program 1 times [2024-09-15 19:40:37,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-15 19:40:37,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759823173] [2024-09-15 19:40:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:40:37,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-15 19:40:37,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-15 19:40:37,329 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-15 19:40:37,330 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-09-15 19:40:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:40:37,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 19:40:37,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:40:37,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:40:37,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:40:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:40:37,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-15 19:40:37,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759823173] [2024-09-15 19:40:37,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759823173] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:40:37,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:40:37,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-09-15 19:40:37,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562910092] [2024-09-15 19:40:37,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:40:37,531 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 19:40:37,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-15 19:40:37,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 19:40:37,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:40:37,532 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-15 19:40:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:40:38,217 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2024-09-15 19:40:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-15 19:40:38,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2024-09-15 19:40:38,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:40:38,222 INFO L225 Difference]: With dead ends: 69 [2024-09-15 19:40:38,222 INFO L226 Difference]: Without dead ends: 62 [2024-09-15 19:40:38,225 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-09-15 19:40:38,225 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 19:40:38,225 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 99 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 19:40:38,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-15 19:40:38,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2024-09-15 19:40:38,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 44 states have internal predecessors, (52), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-15 19:40:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2024-09-15 19:40:38,253 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 27 [2024-09-15 19:40:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:40:38,254 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2024-09-15 19:40:38,254 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-15 19:40:38,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:40:38,254 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2024-09-15 19:40:38,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-15 19:40:38,255 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:40:38,255 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:40:38,270 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-09-15 19:40:38,455 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-15 19:40:38,455 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:40:38,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:40:38,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1088864594, now seen corresponding path program 1 times [2024-09-15 19:40:38,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-15 19:40:38,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129752688] [2024-09-15 19:40:38,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:40:38,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-15 19:40:38,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-15 19:40:38,460 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-15 19:40:38,461 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process