./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.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_valuebound5.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 34f640e37bae156029b1a359a4abe58394472212f3f36aea9107706542ec544a --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 19:38:28,586 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:38:28,674 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:38:28,683 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:38:28,685 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:38:28,715 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:38:28,716 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:38:28,716 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:38:28,717 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:38:28,721 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:38:28,721 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:38:28,721 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:38:28,722 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:38:28,722 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:38:28,723 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:38:28,723 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:38:28,723 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:38:28,723 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:38:28,724 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:38:28,724 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:38:28,726 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:38:28,726 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:38:28,727 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:38:28,727 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:38:28,727 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:38:28,728 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:38:28,728 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:38:28,728 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:38:28,729 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:38:28,729 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:38:28,730 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:38:28,730 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:38:28,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:38:28,731 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:38:28,732 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:38:28,732 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:38:28,732 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:38:28,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:38:28,733 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:38:28,733 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:38:28,734 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:38:28,734 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:38:28,734 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34f640e37bae156029b1a359a4abe58394472212f3f36aea9107706542ec544a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:38:29,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:38:29,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:38:29,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:38:29,105 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:38:29,106 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:38:29,107 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c [2024-09-15 19:38:30,671 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:38:30,917 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:38:30,918 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c [2024-09-15 19:38:30,928 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/6b86a3125/216e974039994fb7b741425240618fd1/FLAGcbc9ce076 [2024-09-15 19:38:30,947 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/6b86a3125/216e974039994fb7b741425240618fd1 [2024-09-15 19:38:30,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:38:30,952 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:38:30,953 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:38:30,955 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:38:30,962 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:38:30,962 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:38:30" (1/1) ... [2024-09-15 19:38:30,964 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32a35cc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:30, skipping insertion in model container [2024-09-15 19:38:30,964 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:38:30" (1/1) ... [2024-09-15 19:38:30,991 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:38:31,163 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c[537,550] [2024-09-15 19:38:31,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:38:31,198 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:38:31,209 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_valuebound5.c[537,550] [2024-09-15 19:38:31,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:38:31,233 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:38:31,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:31 WrapperNode [2024-09-15 19:38:31,234 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:38:31,236 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:38:31,237 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:38:31,237 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:38:31,244 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:31" (1/1) ... [2024-09-15 19:38:31,251 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:31" (1/1) ... [2024-09-15 19:38:31,258 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:38:31,259 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:38:31,259 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:38:31,259 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:38:31,260 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:38:31,270 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:31" (1/1) ... [2024-09-15 19:38:31,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:31" (1/1) ... [2024-09-15 19:38:31,276 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:31" (1/1) ... [2024-09-15 19:38:31,301 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 19:38:31,302 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:31" (1/1) ... [2024-09-15 19:38:31,302 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:31" (1/1) ... [2024-09-15 19:38:31,306 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:31" (1/1) ... [2024-09-15 19:38:31,311 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:31" (1/1) ... [2024-09-15 19:38:31,316 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:31" (1/1) ... [2024-09-15 19:38:31,317 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:31" (1/1) ... [2024-09-15 19:38:31,318 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:38:31,319 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:38:31,319 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:38:31,319 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:38:31,320 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:31" (1/1) ... [2024-09-15 19:38:31,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:38:31,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:38:31,359 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 19:38:31,362 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 19:38:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:38:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:38:31,419 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:38:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:38:31,419 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:38:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:38:31,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:38:31,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:38:31,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:38:31,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:38:31,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:38:31,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:38:31,489 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:38:31,492 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:38:31,646 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-15 19:38:31,647 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:38:31,678 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:38:31,678 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-15 19:38:31,679 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:38:31 BoogieIcfgContainer [2024-09-15 19:38:31,679 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:38:31,681 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:38:31,681 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:38:31,684 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:38:31,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:38:30" (1/3) ... [2024-09-15 19:38:31,685 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ed07ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:38:31, skipping insertion in model container [2024-09-15 19:38:31,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:38:31" (2/3) ... [2024-09-15 19:38:31,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ed07ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:38:31, skipping insertion in model container [2024-09-15 19:38:31,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:38:31" (3/3) ... [2024-09-15 19:38:31,687 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound5.c [2024-09-15 19:38:31,704 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:38:31,705 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:38:31,772 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:38:31,781 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;@4c3e15a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:38:31,781 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:38:31,786 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-15 19:38:31,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-15 19:38:31,799 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:31,800 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:31,801 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:31,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:31,809 INFO L85 PathProgramCache]: Analyzing trace with hash -2062108722, now seen corresponding path program 1 times [2024-09-15 19:38:31,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:31,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676191656] [2024-09-15 19:38:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:31,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:31,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:38:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:32,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:38:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:32,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:38:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:32,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:38:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:38:32,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:32,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676191656] [2024-09-15 19:38:32,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676191656] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:38:32,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:38:32,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 19:38:32,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529759263] [2024-09-15 19:38:32,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:38:32,059 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-15 19:38:32,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:38:32,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-15 19:38:32,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:38:32,088 INFO L87 Difference]: Start difference. First operand has 30 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:38:32,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:38:32,127 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2024-09-15 19:38:32,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-15 19:38:32,130 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-15 19:38:32,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:38:32,137 INFO L225 Difference]: With dead ends: 54 [2024-09-15 19:38:32,137 INFO L226 Difference]: Without dead ends: 26 [2024-09-15 19:38:32,140 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 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 19:38:32,143 INFO L434 NwaCegarLoop]: 32 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, 32 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 19:38:32,144 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:38:32,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-15 19:38:32,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-15 19:38:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-15 19:38:32,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-09-15 19:38:32,182 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 27 [2024-09-15 19:38:32,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:38:32,182 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-09-15 19:38:32,183 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:38:32,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:32,183 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-09-15 19:38:32,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-15 19:38:32,185 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:32,185 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:32,185 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:38:32,186 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:32,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:32,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1085938704, now seen corresponding path program 1 times [2024-09-15 19:38:32,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:32,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704240648] [2024-09-15 19:38:32,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:32,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:38:32,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932613132] [2024-09-15 19:38:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:32,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:32,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:38:32,235 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 19:38:32,236 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 19:38:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:32,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-15 19:38:32,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:38:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 19:38:32,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:38:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:38:32,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:32,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704240648] [2024-09-15 19:38:32,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:38:32,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932613132] [2024-09-15 19:38:32,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932613132] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 19:38:32,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:38:32,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2024-09-15 19:38:32,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7244751] [2024-09-15 19:38:32,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:38:32,711 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:38:32,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:38:32,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:38:32,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-15 19:38:32,713 INFO L87 Difference]: Start difference. First operand 26 states and 30 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-15 19:38:32,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:38:32,835 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2024-09-15 19:38:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:38:32,836 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-15 19:38:32,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:38:32,837 INFO L225 Difference]: With dead ends: 37 [2024-09-15 19:38:32,837 INFO L226 Difference]: Without dead ends: 35 [2024-09-15 19:38:32,839 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:38:32,840 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:38:32,842 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 80 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:38:32,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-15 19:38:32,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2024-09-15 19:38:32,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-15 19:38:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-15 19:38:32,856 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 27 [2024-09-15 19:38:32,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:38:32,859 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-15 19:38:32,859 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-15 19:38:32,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:32,862 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-15 19:38:32,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-15 19:38:32,862 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:32,863 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:32,883 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-15 19:38:33,063 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:33,064 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:33,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:33,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1368497365, now seen corresponding path program 1 times [2024-09-15 19:38:33,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:33,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304131065] [2024-09-15 19:38:33,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:33,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:33,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:38:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:33,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:38:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:33,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:38:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:33,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:38:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:33,315 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:38:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 19:38:33,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:33,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304131065] [2024-09-15 19:38:33,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304131065] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:38:33,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:38:33,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-15 19:38:33,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798562606] [2024-09-15 19:38:33,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:38:33,335 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 19:38:33,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:38:33,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 19:38:33,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:38:33,337 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:38:33,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:38:33,411 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2024-09-15 19:38:33,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 19:38:33,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-09-15 19:38:33,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:38:33,413 INFO L225 Difference]: With dead ends: 42 [2024-09-15 19:38:33,414 INFO L226 Difference]: Without dead ends: 35 [2024-09-15 19:38:33,414 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 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 19:38:33,415 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:38:33,416 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:38:33,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-15 19:38:33,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2024-09-15 19:38:33,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-15 19:38:33,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-09-15 19:38:33,430 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 33 [2024-09-15 19:38:33,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:38:33,431 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-09-15 19:38:33,431 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:38:33,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:33,432 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-09-15 19:38:33,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-15 19:38:33,433 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:33,433 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:33,433 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-15 19:38:33,434 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:33,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:33,434 INFO L85 PathProgramCache]: Analyzing trace with hash -65395240, now seen corresponding path program 1 times [2024-09-15 19:38:33,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:33,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668851596] [2024-09-15 19:38:33,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:33,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:38:33,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135427947] [2024-09-15 19:38:33,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:33,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:33,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:38:33,488 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 19:38:33,495 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 19:38:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:33,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-15 19:38:33,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:38:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:38:33,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:38:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:38:35,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:35,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668851596] [2024-09-15 19:38:35,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:38:35,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135427947] [2024-09-15 19:38:35,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135427947] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 19:38:35,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:38:35,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2024-09-15 19:38:35,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330155035] [2024-09-15 19:38:35,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:38:35,877 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 19:38:35,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:38:35,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 19:38:35,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:38:35,878 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:38:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:38:36,045 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2024-09-15 19:38:36,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 19:38:36,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-09-15 19:38:36,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:38:36,047 INFO L225 Difference]: With dead ends: 45 [2024-09-15 19:38:36,048 INFO L226 Difference]: Without dead ends: 43 [2024-09-15 19:38:36,048 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-09-15 19:38:36,049 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:38:36,050 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 117 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:38:36,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-15 19:38:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-09-15 19:38:36,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-15 19:38:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-09-15 19:38:36,063 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2024-09-15 19:38:36,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:38:36,064 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-09-15 19:38:36,064 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:38:36,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:36,065 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-09-15 19:38:36,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-15 19:38:36,066 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:36,066 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:36,083 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 19:38:36,269 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 19:38:36,269 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:36,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:36,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1709612122, now seen corresponding path program 1 times [2024-09-15 19:38:36,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:36,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280707979] [2024-09-15 19:38:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:36,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:38:36,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112988018] [2024-09-15 19:38:36,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:36,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:36,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:38:36,289 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 19:38:36,291 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 19:38:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:36,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-15 19:38:36,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:38:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 19:38:36,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:38:37,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 19:38:37,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:37,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280707979] [2024-09-15 19:38:37,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:38:37,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112988018] [2024-09-15 19:38:37,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112988018] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:38:37,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:38:37,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2024-09-15 19:38:37,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12025148] [2024-09-15 19:38:37,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:38:37,363 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-15 19:38:37,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:38:37,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-15 19:38:37,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-09-15 19:38:37,364 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-15 19:38:38,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:38:38,074 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-09-15 19:38:38,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-15 19:38:38,075 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 36 [2024-09-15 19:38:38,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:38:38,077 INFO L225 Difference]: With dead ends: 67 [2024-09-15 19:38:38,077 INFO L226 Difference]: Without dead ends: 60 [2024-09-15 19:38:38,078 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2024-09-15 19:38:38,081 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 19:38:38,082 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 161 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 19:38:38,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-15 19:38:38,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-15 19:38:38,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 19:38:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2024-09-15 19:38:38,112 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 36 [2024-09-15 19:38:38,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:38:38,113 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2024-09-15 19:38:38,113 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-15 19:38:38,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:38,113 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2024-09-15 19:38:38,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-15 19:38:38,114 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:38,114 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:38,131 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 19:38:38,318 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 19:38:38,319 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:38,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:38,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1894068381, now seen corresponding path program 1 times [2024-09-15 19:38:38,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:38,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616657423] [2024-09-15 19:38:38,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:38,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:38:38,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861838905] [2024-09-15 19:38:38,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:38,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:38,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:38:38,355 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 19:38:38,356 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 19:38:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:38,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-15 19:38:38,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:38:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 19:38:38,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:38:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 19:38:38,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:38,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616657423] [2024-09-15 19:38:38,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:38:38,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861838905] [2024-09-15 19:38:38,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861838905] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:38:38,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:38:38,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2024-09-15 19:38:38,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188698031] [2024-09-15 19:38:38,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:38:38,655 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-15 19:38:38,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:38:38,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-15 19:38:38,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-15 19:38:38,656 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-15 19:38:38,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:38:38,748 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-09-15 19:38:38,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:38:38,749 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 42 [2024-09-15 19:38:38,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:38:38,750 INFO L225 Difference]: With dead ends: 67 [2024-09-15 19:38:38,750 INFO L226 Difference]: Without dead ends: 60 [2024-09-15 19:38:38,750 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:38:38,751 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:38:38,751 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 123 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:38:38,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-15 19:38:38,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-15 19:38:38,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 19:38:38,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-09-15 19:38:38,769 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 42 [2024-09-15 19:38:38,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:38:38,769 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-09-15 19:38:38,770 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-15 19:38:38,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:38,770 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-09-15 19:38:38,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-15 19:38:38,771 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:38,771 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:38,789 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 19:38:38,975 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 19:38:38,975 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:38,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:38,976 INFO L85 PathProgramCache]: Analyzing trace with hash -455011438, now seen corresponding path program 1 times [2024-09-15 19:38:38,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:38,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002554657] [2024-09-15 19:38:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:38,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:38:39,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459047578] [2024-09-15 19:38:39,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:39,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:39,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:38:39,030 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 19:38:39,031 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 19:38:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:39,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-15 19:38:39,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:38:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-15 19:38:39,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:38:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-15 19:38:49,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:49,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002554657] [2024-09-15 19:38:49,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:38:49,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459047578] [2024-09-15 19:38:49,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459047578] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:38:49,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:38:49,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2024-09-15 19:38:49,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105950836] [2024-09-15 19:38:49,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:38:49,248 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-15 19:38:49,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:38:49,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-15 19:38:49,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-09-15 19:38:49,249 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-15 19:38:57,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:38:57,319 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2024-09-15 19:38:57,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-15 19:38:57,320 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 45 [2024-09-15 19:38:57,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:38:57,321 INFO L225 Difference]: With dead ends: 90 [2024-09-15 19:38:57,321 INFO L226 Difference]: Without dead ends: 88 [2024-09-15 19:38:57,321 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-09-15 19:38:57,322 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:38:57,322 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 188 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-09-15 19:38:57,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-15 19:38:57,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2024-09-15 19:38:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.14) internal successors, (57), 52 states have internal predecessors, (57), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-15 19:38:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2024-09-15 19:38:57,356 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 45 [2024-09-15 19:38:57,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:38:57,356 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2024-09-15 19:38:57,357 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-15 19:38:57,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:57,357 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2024-09-15 19:38:57,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-15 19:38:57,358 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:57,358 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:57,371 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-15 19:38:57,560 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 19:38:57,561 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:57,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:57,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1692331952, now seen corresponding path program 2 times [2024-09-15 19:38:57,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:57,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950210606] [2024-09-15 19:38:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:57,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:58,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:38:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:58,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:38:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:58,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:38:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:58,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:38:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:58,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:38:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:58,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 19:38:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:58,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-15 19:38:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:58,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:38:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-15 19:38:58,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:58,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950210606] [2024-09-15 19:38:58,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950210606] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:38:58,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82026121] [2024-09-15 19:38:58,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:38:58,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:58,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:38:58,290 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 19:38:58,291 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 19:38:58,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:38:58,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:38:58,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-15 19:38:58,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:38:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 19:38:58,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:38:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-15 19:38:58,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82026121] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:38:58,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:38:58,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2024-09-15 19:38:58,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687184939] [2024-09-15 19:38:58,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:38:58,708 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-15 19:38:58,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:38:58,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-15 19:38:58,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-09-15 19:38:58,710 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-09-15 19:38:58,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:38:58,984 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2024-09-15 19:38:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 19:38:58,985 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) Word has length 63 [2024-09-15 19:38:58,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:38:58,986 INFO L225 Difference]: With dead ends: 115 [2024-09-15 19:38:58,986 INFO L226 Difference]: Without dead ends: 50 [2024-09-15 19:38:58,987 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2024-09-15 19:38:58,987 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:38:58,988 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 247 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:38:58,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-15 19:38:59,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-15 19:38:59,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-15 19:38:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-09-15 19:38:59,002 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 63 [2024-09-15 19:38:59,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:38:59,003 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-09-15 19:38:59,003 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-09-15 19:38:59,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:59,003 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-09-15 19:38:59,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-15 19:38:59,004 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:38:59,005 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:38:59,022 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-15 19:38:59,208 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 19:38:59,209 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:38:59,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:38:59,209 INFO L85 PathProgramCache]: Analyzing trace with hash 499200656, now seen corresponding path program 2 times [2024-09-15 19:38:59,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:38:59,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309031767] [2024-09-15 19:38:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:38:59,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:38:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:59,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:38:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:59,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:38:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:59,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:38:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:59,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:38:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:59,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:38:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:59,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 19:38:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:59,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-15 19:38:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:59,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:38:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:38:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 41 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 19:38:59,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:38:59,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309031767] [2024-09-15 19:38:59,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309031767] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:38:59,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206469118] [2024-09-15 19:38:59,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:38:59,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:38:59,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:38:59,699 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 19:38:59,701 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 19:38:59,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:38:59,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:38:59,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-15 19:38:59,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:38:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 56 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-15 19:38:59,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:39:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 19:39:01,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206469118] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:39:01,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:39:01,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 25 [2024-09-15 19:39:01,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365198682] [2024-09-15 19:39:01,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:39:01,103 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-15 19:39:01,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:39:01,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-15 19:39:01,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2024-09-15 19:39:01,105 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 15 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) [2024-09-15 19:39:01,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:39:01,311 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2024-09-15 19:39:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-15 19:39:01,312 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 15 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) Word has length 63 [2024-09-15 19:39:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:39:01,313 INFO L225 Difference]: With dead ends: 54 [2024-09-15 19:39:01,313 INFO L226 Difference]: Without dead ends: 0 [2024-09-15 19:39:01,314 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2024-09-15 19:39:01,314 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:39:01,314 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 237 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:39:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-15 19:39:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-15 19:39:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 19:39:01,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-15 19:39:01,315 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2024-09-15 19:39:01,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:39:01,316 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-15 19:39:01,316 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 15 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) [2024-09-15 19:39:01,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:39:01,316 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-15 19:39:01,317 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-15 19:39:01,319 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-15 19:39:01,328 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 19:39:01,520 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 19:39:01,523 INFO L408 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1] [2024-09-15 19:39:01,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-15 19:39:03,409 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-15 19:39:03,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.09 07:39:03 BoogieIcfgContainer [2024-09-15 19:39:03,432 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-15 19:39:03,432 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-15 19:39:03,432 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-15 19:39:03,433 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-15 19:39:03,433 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:38:31" (3/4) ... [2024-09-15 19:39:03,435 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-15 19:39:03,437 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-15 19:39:03,438 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-09-15 19:39:03,438 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-15 19:39:03,438 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-15 19:39:03,441 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2024-09-15 19:39:03,441 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-09-15 19:39:03,441 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-15 19:39:03,441 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-15 19:39:03,531 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-15 19:39:03,532 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-15 19:39:03,532 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-15 19:39:03,532 INFO L158 Benchmark]: Toolchain (without parser) took 32580.46ms. Allocated memory was 79.7MB in the beginning and 117.4MB in the end (delta: 37.7MB). Free memory was 56.5MB in the beginning and 56.3MB in the end (delta: 206.2kB). Peak memory consumption was 39.3MB. Max. memory is 16.1GB. [2024-09-15 19:39:03,532 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 56.6MB. Free memory was 28.3MB in the beginning and 28.2MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 19:39:03,533 INFO L158 Benchmark]: CACSL2BoogieTranslator took 281.48ms. Allocated memory is still 79.7MB. Free memory was 56.3MB in the beginning and 44.8MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-15 19:39:03,533 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.76ms. Allocated memory is still 79.7MB. Free memory was 44.8MB in the beginning and 43.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 19:39:03,533 INFO L158 Benchmark]: Boogie Preprocessor took 59.28ms. Allocated memory is still 79.7MB. Free memory was 43.7MB in the beginning and 42.1MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-15 19:39:03,533 INFO L158 Benchmark]: RCFGBuilder took 359.69ms. Allocated memory is still 79.7MB. Free memory was 42.1MB in the beginning and 51.0MB in the end (delta: -8.9MB). Peak memory consumption was 8.0MB. Max. memory is 16.1GB. [2024-09-15 19:39:03,533 INFO L158 Benchmark]: TraceAbstraction took 31751.26ms. Allocated memory was 79.7MB in the beginning and 117.4MB in the end (delta: 37.7MB). Free memory was 50.3MB in the beginning and 60.5MB in the end (delta: -10.1MB). Peak memory consumption was 61.5MB. Max. memory is 16.1GB. [2024-09-15 19:39:03,534 INFO L158 Benchmark]: Witness Printer took 99.45ms. Allocated memory is still 117.4MB. Free memory was 60.5MB in the beginning and 56.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-15 19:39:03,535 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 56.6MB. Free memory was 28.3MB in the beginning and 28.2MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 281.48ms. Allocated memory is still 79.7MB. Free memory was 56.3MB in the beginning and 44.8MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.76ms. Allocated memory is still 79.7MB. Free memory was 44.8MB in the beginning and 43.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 59.28ms. Allocated memory is still 79.7MB. Free memory was 43.7MB in the beginning and 42.1MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 359.69ms. Allocated memory is still 79.7MB. Free memory was 42.1MB in the beginning and 51.0MB in the end (delta: -8.9MB). Peak memory consumption was 8.0MB. Max. memory is 16.1GB. * TraceAbstraction took 31751.26ms. Allocated memory was 79.7MB in the beginning and 117.4MB in the end (delta: 37.7MB). Free memory was 50.3MB in the beginning and 60.5MB in the end (delta: -10.1MB). Peak memory consumption was 61.5MB. Max. memory is 16.1GB. * Witness Printer took 99.45ms. Allocated memory is still 117.4MB. Free memory was 60.5MB in the beginning and 56.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 29.8s, OverallIterations: 9, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 9.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 102 SdHoareTripleChecker+Valid, 4.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 96 mSDsluCounter, 1272 SdHoareTripleChecker+Invalid, 4.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1065 mSDsCounter, 49 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 999 IncrementalHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 49 mSolverCounterUnsat, 207 mSDtfsCounter, 999 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 734 GetRequests, 579 SyntacticMatches, 18 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 16.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=7, InterpolantAutomatonStates: 91, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 24 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 17.3s InterpolantComputationTime, 684 NumberOfCodeBlocks, 684 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 792 ConstructedInterpolants, 1 QuantifiedInterpolants, 4429 SizeOfPredicates, 12 NumberOfNonLiveVariables, 769 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 18 InterpolantComputations, 4 PerfectInterpolantSequences, 646/710 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((((((((z + ((__int128) y * x)) == ((long long) b * a)) && (b <= 5)) && (((long long) a * 2) == x)) && (0 <= a)) && (1 <= b)) && (a <= 5)) && ((((long long) -1 + b) / 2) == y)) || ((((((z == ((long long) b * a)) && (b <= 5)) && (0 <= a)) && (1 <= b)) && (y == 0)) && (a <= 5))) || (((((((z == 0) && (b == y)) && (0 <= a)) && (1 <= y)) && (a <= 5)) && (a == x)) && (y <= 5))) || ((((((y == 1) && (b <= 5)) && (((__int128) z + x) == ((long long) b * a))) && (0 <= a)) && (1 <= b)) && (a <= 5))) || ((((((((z == 0) && (y == (b / 2))) && (b <= 5)) && (((long long) a * 2) == x)) && (0 <= a)) && ((b % 2) != 1)) && (1 <= y)) && (a <= 5))) - ProcedureContractResult [Line: 9]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 12]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-15 19:39:03,572 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE