./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.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/sqrt1-ll_unwindbound10.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 4615816b63186e8ef25ffa56a09fb574b90534edb7a787dbb36e36eb2c34dee2 --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 19:41:55,038 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:41:55,111 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:41:55,117 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:41:55,118 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:41:55,147 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:41:55,147 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:41:55,148 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:41:55,148 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:41:55,150 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:41:55,151 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:41:55,151 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:41:55,151 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:41:55,152 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:41:55,155 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:41:55,155 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:41:55,155 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:41:55,155 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:41:55,156 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:41:55,156 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:41:55,156 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:41:55,156 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:41:55,157 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:41:55,157 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:41:55,157 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:41:55,157 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:41:55,157 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:41:55,158 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:41:55,158 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:41:55,158 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:41:55,158 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:41:55,158 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:41:55,159 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:41:55,159 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:41:55,159 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:41:55,159 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:41:55,159 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:41:55,160 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:41:55,160 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:41:55,160 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:41:55,162 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:41:55,162 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:41:55,162 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4615816b63186e8ef25ffa56a09fb574b90534edb7a787dbb36e36eb2c34dee2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:41:55,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:41:55,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:41:55,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:41:55,477 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:41:55,478 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:41:55,479 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2024-09-15 19:41:57,044 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:41:57,209 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:41:57,210 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2024-09-15 19:41:57,216 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c89091c7b/13f6229113cc46c89fb9213ee217e3bd/FLAG765ebaa83 [2024-09-15 19:41:57,226 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c89091c7b/13f6229113cc46c89fb9213ee217e3bd [2024-09-15 19:41:57,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:41:57,229 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:41:57,230 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:41:57,230 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:41:57,237 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:41:57,238 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:41:57" (1/1) ... [2024-09-15 19:41:57,238 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@121a4a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:41:57, skipping insertion in model container [2024-09-15 19:41:57,239 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:41:57" (1/1) ... [2024-09-15 19:41:57,254 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:41:57,398 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/sqrt1-ll_unwindbound10.c[520,533] [2024-09-15 19:41:57,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:41:57,438 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:41:57,450 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/sqrt1-ll_unwindbound10.c[520,533] [2024-09-15 19:41:57,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:41:57,474 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:41:57,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:41:57 WrapperNode [2024-09-15 19:41:57,474 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:41:57,475 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:41:57,476 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:41:57,476 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:41:57,482 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:41:57" (1/1) ... [2024-09-15 19:41:57,487 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:41:57" (1/1) ... [2024-09-15 19:41:57,494 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:41:57,494 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:41:57,495 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:41:57,495 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:41:57,495 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:41:57,505 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:41:57" (1/1) ... [2024-09-15 19:41:57,505 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:41:57" (1/1) ... [2024-09-15 19:41:57,509 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:41:57" (1/1) ... [2024-09-15 19:41:57,527 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 19:41:57,528 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:41:57" (1/1) ... [2024-09-15 19:41:57,529 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:41:57" (1/1) ... [2024-09-15 19:41:57,531 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:41:57" (1/1) ... [2024-09-15 19:41:57,535 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:41:57" (1/1) ... [2024-09-15 19:41:57,540 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:41:57" (1/1) ... [2024-09-15 19:41:57,541 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:41:57" (1/1) ... [2024-09-15 19:41:57,542 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:41:57,543 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:41:57,543 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:41:57,543 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:41:57,543 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:41:57" (1/1) ... [2024-09-15 19:41:57,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:41:57,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:41:57,575 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 19:41:57,578 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 19:41:57,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:41:57,622 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:41:57,622 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:41:57,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:41:57,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:41:57,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:41:57,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:41:57,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:41:57,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:41:57,624 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:41:57,686 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:41:57,687 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:41:57,840 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-15 19:41:57,841 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:41:57,869 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:41:57,872 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-15 19:41:57,872 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:41:57 BoogieIcfgContainer [2024-09-15 19:41:57,872 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:41:57,874 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:41:57,874 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:41:57,877 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:41:57,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:41:57" (1/3) ... [2024-09-15 19:41:57,878 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d62f68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:41:57, skipping insertion in model container [2024-09-15 19:41:57,878 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:41:57" (2/3) ... [2024-09-15 19:41:57,878 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d62f68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:41:57, skipping insertion in model container [2024-09-15 19:41:57,878 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:41:57" (3/3) ... [2024-09-15 19:41:57,879 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound10.c [2024-09-15 19:41:57,893 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:41:57,894 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:41:57,953 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:41:57,961 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;@24e33743, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:41:57,962 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:41:57,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-15 19:41:57,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-15 19:41:57,974 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:41:57,974 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:41:57,975 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:41:57,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:41:57,983 INFO L85 PathProgramCache]: Analyzing trace with hash -97680429, now seen corresponding path program 1 times [2024-09-15 19:41:57,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:41:57,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606479383] [2024-09-15 19:41:57,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:41:57,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:41:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:41:58,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:41:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:41:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:41:58,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:41:58,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606479383] [2024-09-15 19:41:58,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606479383] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:41:58,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:41:58,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 19:41:58,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267510460] [2024-09-15 19:41:58,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:41:58,173 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-15 19:41:58,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:41:58,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-15 19:41:58,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 19:41:58,196 INFO L87 Difference]: Start difference. First operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 19:41:58,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:41:58,285 INFO L93 Difference]: Finished difference Result 44 states and 67 transitions. [2024-09-15 19:41:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-15 19:41:58,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-15 19:41:58,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:41:58,297 INFO L225 Difference]: With dead ends: 44 [2024-09-15 19:41:58,297 INFO L226 Difference]: Without dead ends: 21 [2024-09-15 19:41:58,300 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 19:41:58,306 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:41:58,308 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:41:58,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-15 19:41:58,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2024-09-15 19:41:58,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-15 19:41:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2024-09-15 19:41:58,360 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2024-09-15 19:41:58,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:41:58,361 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2024-09-15 19:41:58,362 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 19:41:58,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:41:58,364 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2024-09-15 19:41:58,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-15 19:41:58,364 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:41:58,365 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:41:58,365 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:41:58,366 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:41:58,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:41:58,368 INFO L85 PathProgramCache]: Analyzing trace with hash 801118595, now seen corresponding path program 1 times [2024-09-15 19:41:58,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:41:58,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506023412] [2024-09-15 19:41:58,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:41:58,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:41:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:41:58,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:41:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:41:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:41:58,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:41:58,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506023412] [2024-09-15 19:41:58,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506023412] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:41:58,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:41:58,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-15 19:41:58,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558129058] [2024-09-15 19:41:58,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:41:58,594 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:41:58,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:41:58,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:41:58,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:41:58,597 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 19:41:58,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:41:58,711 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2024-09-15 19:41:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 19:41:58,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-15 19:41:58,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:41:58,713 INFO L225 Difference]: With dead ends: 31 [2024-09-15 19:41:58,713 INFO L226 Difference]: Without dead ends: 22 [2024-09-15 19:41:58,713 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:41:58,715 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:41:58,716 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 43 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:41:58,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-15 19:41:58,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-15 19:41:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-15 19:41:58,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2024-09-15 19:41:58,728 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2024-09-15 19:41:58,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:41:58,729 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2024-09-15 19:41:58,729 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 19:41:58,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:41:58,730 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2024-09-15 19:41:58,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-15 19:41:58,731 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:41:58,731 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:41:58,732 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 19:41:58,732 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:41:58,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:41:58,732 INFO L85 PathProgramCache]: Analyzing trace with hash 802786891, now seen corresponding path program 1 times [2024-09-15 19:41:58,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:41:58,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072281550] [2024-09-15 19:41:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:41:58,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:41:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:41:58,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:41:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:41:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:41:58,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:41:58,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072281550] [2024-09-15 19:41:58,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072281550] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:41:58,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:41:58,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-15 19:41:58,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535186396] [2024-09-15 19:41:58,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:41:58,877 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 19:41:58,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:41:58,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 19:41:58,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:41:58,878 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 19:41:59,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:41:59,012 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2024-09-15 19:41:59,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 19:41:59,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-15 19:41:59,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:41:59,013 INFO L225 Difference]: With dead ends: 35 [2024-09-15 19:41:59,015 INFO L226 Difference]: Without dead ends: 33 [2024-09-15 19:41:59,015 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-09-15 19:41:59,017 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:41:59,020 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 53 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:41:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-15 19:41:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-09-15 19:41:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 19:41:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2024-09-15 19:41:59,032 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 11 [2024-09-15 19:41:59,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:41:59,032 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2024-09-15 19:41:59,032 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 19:41:59,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:41:59,033 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2024-09-15 19:41:59,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-15 19:41:59,034 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:41:59,034 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:41:59,034 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-15 19:41:59,034 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:41:59,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:41:59,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1280493866, now seen corresponding path program 1 times [2024-09-15 19:41:59,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:41:59,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331902882] [2024-09-15 19:41:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:41:59,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:41:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:41:59,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141659110] [2024-09-15 19:41:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:41:59,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:41:59,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:41:59,050 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 19:41:59,052 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 19:41:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:41:59,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 19:41:59,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:41:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:41:59,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:41:59,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:41:59,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331902882] [2024-09-15 19:41:59,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:41:59,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141659110] [2024-09-15 19:41:59,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141659110] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:41:59,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:41:59,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:41:59,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729330765] [2024-09-15 19:41:59,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:41:59,186 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:41:59,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:41:59,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:41:59,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:41:59,187 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 19:41:59,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:41:59,249 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2024-09-15 19:41:59,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:41:59,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2024-09-15 19:41:59,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:41:59,250 INFO L225 Difference]: With dead ends: 39 [2024-09-15 19:41:59,251 INFO L226 Difference]: Without dead ends: 37 [2024-09-15 19:41:59,251 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:41:59,252 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:41:59,252 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 78 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:41:59,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-15 19:41:59,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2024-09-15 19:41:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-15 19:41:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2024-09-15 19:41:59,263 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 16 [2024-09-15 19:41:59,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:41:59,263 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2024-09-15 19:41:59,263 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 19:41:59,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:41:59,264 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2024-09-15 19:41:59,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-15 19:41:59,264 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:41:59,264 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:41:59,284 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 19:41:59,465 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:41:59,465 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:41:59,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:41:59,466 INFO L85 PathProgramCache]: Analyzing trace with hash 925975787, now seen corresponding path program 1 times [2024-09-15 19:41:59,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:41:59,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901511636] [2024-09-15 19:41:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:41:59,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:41:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:41:59,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40637792] [2024-09-15 19:41:59,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:41:59,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:41:59,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:41:59,480 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 19:41:59,482 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 19:41:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:41:59,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 19:41:59,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:41:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:41:59,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:41:59,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:41:59,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901511636] [2024-09-15 19:41:59,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:41:59,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40637792] [2024-09-15 19:41:59,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40637792] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:41:59,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:41:59,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:41:59,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779341945] [2024-09-15 19:41:59,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:41:59,584 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:41:59,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:41:59,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:41:59,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:41:59,585 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:41:59,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:41:59,635 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2024-09-15 19:41:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:41:59,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-15 19:41:59,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:41:59,636 INFO L225 Difference]: With dead ends: 43 [2024-09-15 19:41:59,636 INFO L226 Difference]: Without dead ends: 38 [2024-09-15 19:41:59,637 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:41:59,637 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:41:59,638 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 93 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:41:59,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-15 19:41:59,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-09-15 19:41:59,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-15 19:41:59,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-09-15 19:41:59,646 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 21 [2024-09-15 19:41:59,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:41:59,647 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-09-15 19:41:59,647 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 19:41:59,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:41:59,647 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-09-15 19:41:59,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-15 19:41:59,648 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:41:59,648 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:41:59,666 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-15 19:41:59,852 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:41:59,853 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:41:59,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:41:59,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1435580062, now seen corresponding path program 1 times [2024-09-15 19:41:59,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:41:59,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983824426] [2024-09-15 19:41:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:41:59,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:41:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:41:59,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:41:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:41:59,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-15 19:41:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:41:59,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-15 19:41:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:42:00,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 19:42:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:42:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:42:00,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:42:00,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983824426] [2024-09-15 19:42:00,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983824426] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:42:00,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352334238] [2024-09-15 19:42:00,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:42:00,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:42:00,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:42:00,012 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 19:42:00,013 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 19:42:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:42:00,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 19:42:00,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:42:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:42:00,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:42:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:42:00,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352334238] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:42:00,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:42:00,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-09-15 19:42:00,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428087464] [2024-09-15 19:42:00,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:42:00,205 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-15 19:42:00,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:42:00,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-15 19:42:00,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:42:00,206 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-15 19:42:00,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:42:00,447 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2024-09-15 19:42:00,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-15 19:42:00,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 29 [2024-09-15 19:42:00,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:42:00,450 INFO L225 Difference]: With dead ends: 79 [2024-09-15 19:42:00,450 INFO L226 Difference]: Without dead ends: 70 [2024-09-15 19:42:00,451 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-09-15 19:42:00,451 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:42:00,451 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 49 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:42:00,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-15 19:42:00,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2024-09-15 19:42:00,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 35 states have (on average 1.2) internal successors, (42), 38 states have internal predecessors, (42), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-15 19:42:00,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2024-09-15 19:42:00,475 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 29 [2024-09-15 19:42:00,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:42:00,476 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2024-09-15 19:42:00,476 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-15 19:42:00,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:42:00,477 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2024-09-15 19:42:00,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-15 19:42:00,477 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:42:00,478 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:42:00,495 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 19:42:00,681 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-15 19:42:00,682 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:42:00,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:42:00,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1437248358, now seen corresponding path program 1 times [2024-09-15 19:42:00,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:42:00,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226844850] [2024-09-15 19:42:00,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:42:00,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:42:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:42:00,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:42:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:42:00,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-15 19:42:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:42:00,813 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-15 19:42:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:42:00,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 19:42:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:42:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:42:00,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:42:00,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226844850] [2024-09-15 19:42:00,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226844850] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:42:00,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482252342] [2024-09-15 19:42:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:42:00,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:42:00,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:42:00,834 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 19:42:00,835 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 19:42:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:42:00,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-15 19:42:00,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:42:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:42:00,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:42:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 19:42:01,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482252342] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 19:42:01,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:42:01,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 10 [2024-09-15 19:42:01,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409534520] [2024-09-15 19:42:01,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:42:01,034 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:42:01,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:42:01,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:42:01,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-15 19:42:01,035 INFO L87 Difference]: Start difference. First operand 66 states and 84 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), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:42:01,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:42:01,105 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2024-09-15 19:42:01,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:42:01,106 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), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-09-15 19:42:01,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:42:01,107 INFO L225 Difference]: With dead ends: 80 [2024-09-15 19:42:01,107 INFO L226 Difference]: Without dead ends: 78 [2024-09-15 19:42:01,107 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:42:01,108 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:42:01,108 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 66 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:42:01,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-15 19:42:01,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-09-15 19:42:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 47 states have internal predecessors, (51), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-15 19:42:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2024-09-15 19:42:01,126 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 29 [2024-09-15 19:42:01,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:42:01,126 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2024-09-15 19:42:01,126 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), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:42:01,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:42:01,127 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2024-09-15 19:42:01,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-15 19:42:01,128 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:42:01,128 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:42:01,145 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 19:42:01,332 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:42:01,333 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:42:01,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:42:01,333 INFO L85 PathProgramCache]: Analyzing trace with hash 857281179, now seen corresponding path program 2 times [2024-09-15 19:42:01,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:42:01,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069195405] [2024-09-15 19:42:01,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:42:01,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:42:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:42:01,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505682115] [2024-09-15 19:42:01,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:42:01,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:42:01,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:42:01,348 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 19:42:01,352 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 19:42:01,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:42:01,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:42:01,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-15 19:42:01,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:42:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 19:42:01,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:42:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 19:42:01,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:42:01,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069195405] [2024-09-15 19:42:01,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:42:01,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505682115] [2024-09-15 19:42:01,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505682115] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:42:01,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:42:01,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-09-15 19:42:01,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088145752] [2024-09-15 19:42:01,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:42:01,698 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-15 19:42:01,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:42:01,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-15 19:42:01,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-09-15 19:42:01,699 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-15 19:42:01,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:42:01,874 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2024-09-15 19:42:01,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 19:42:01,875 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 34 [2024-09-15 19:42:01,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:42:01,876 INFO L225 Difference]: With dead ends: 78 [2024-09-15 19:42:01,876 INFO L226 Difference]: Without dead ends: 0 [2024-09-15 19:42:01,876 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-09-15 19:42:01,877 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:42:01,877 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 143 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:42:01,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-15 19:42:01,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-15 19:42:01,888 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 19:42:01,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-15 19:42:01,888 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2024-09-15 19:42:01,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:42:01,889 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-15 19:42:01,889 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-15 19:42:01,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:42:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-15 19:42:01,889 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-15 19:42:01,894 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-15 19:42:01,910 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 19:42:02,098 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-15 19:42:02,101 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2024-09-15 19:42:02,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-15 19:42:02,695 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-15 19:42:02,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.09 07:42:02 BoogieIcfgContainer [2024-09-15 19:42:02,714 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-15 19:42:02,714 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-15 19:42:02,715 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-15 19:42:02,715 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-15 19:42:02,715 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:41:57" (3/4) ... [2024-09-15 19:42:02,718 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-15 19:42:02,721 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-15 19:42:02,721 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-15 19:42:02,721 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-15 19:42:02,726 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2024-09-15 19:42:02,726 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-09-15 19:42:02,727 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-15 19:42:02,727 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-15 19:42:02,753 WARN L216 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((__int128) a * 2) + ((__int128) a * a)) + 1) == s) && (\old(counter) == 0)) && (t == (((__int128) a * 2) + 1))) [2024-09-15 19:42:02,811 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-15 19:42:02,812 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-15 19:42:02,812 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-15 19:42:02,812 INFO L158 Benchmark]: Toolchain (without parser) took 5583.23ms. Allocated memory was 65.0MB in the beginning and 96.5MB in the end (delta: 31.5MB). Free memory was 32.7MB in the beginning and 54.2MB in the end (delta: -21.5MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. [2024-09-15 19:42:02,813 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 50.3MB. Free memory is still 27.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 19:42:02,813 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.34ms. Allocated memory is still 65.0MB. Free memory was 32.5MB in the beginning and 37.1MB in the end (delta: -4.6MB). Peak memory consumption was 6.8MB. Max. memory is 16.1GB. [2024-09-15 19:42:02,813 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.02ms. Allocated memory is still 65.0MB. Free memory was 37.1MB in the beginning and 36.1MB in the end (delta: 991.0kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 19:42:02,814 INFO L158 Benchmark]: Boogie Preprocessor took 46.84ms. Allocated memory is still 65.0MB. Free memory was 36.1MB in the beginning and 34.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-15 19:42:02,814 INFO L158 Benchmark]: RCFGBuilder took 329.75ms. Allocated memory is still 65.0MB. Free memory was 34.3MB in the beginning and 40.0MB in the end (delta: -5.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-15 19:42:02,815 INFO L158 Benchmark]: TraceAbstraction took 4840.14ms. Allocated memory was 65.0MB in the beginning and 96.5MB in the end (delta: 31.5MB). Free memory was 39.3MB in the beginning and 59.3MB in the end (delta: -20.0MB). Peak memory consumption was 39.7MB. Max. memory is 16.1GB. [2024-09-15 19:42:02,815 INFO L158 Benchmark]: Witness Printer took 97.44ms. Allocated memory is still 96.5MB. Free memory was 59.3MB in the beginning and 54.2MB in the end (delta: 5.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-15 19:42:02,816 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 50.3MB. Free memory is still 27.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 244.34ms. Allocated memory is still 65.0MB. Free memory was 32.5MB in the beginning and 37.1MB in the end (delta: -4.6MB). Peak memory consumption was 6.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.02ms. Allocated memory is still 65.0MB. Free memory was 37.1MB in the beginning and 36.1MB in the end (delta: 991.0kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 46.84ms. Allocated memory is still 65.0MB. Free memory was 36.1MB in the beginning and 34.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 329.75ms. Allocated memory is still 65.0MB. Free memory was 34.3MB in the beginning and 40.0MB in the end (delta: -5.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4840.14ms. Allocated memory was 65.0MB in the beginning and 96.5MB in the end (delta: 31.5MB). Free memory was 39.3MB in the beginning and 59.3MB in the end (delta: -20.0MB). Peak memory consumption was 39.7MB. Max. memory is 16.1GB. * Witness Printer took 97.44ms. Allocated memory is still 96.5MB. Free memory was 59.3MB in the beginning and 54.2MB in the end (delta: 5.1MB). 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: 14]: 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 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.2s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 119 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 98 mSDsluCounter, 554 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 397 mSDsCounter, 99 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 449 IncrementalHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 99 mSolverCounterUnsat, 157 mSDtfsCounter, 449 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 279 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=7, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 290 NumberOfCodeBlocks, 290 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 298 ConstructedInterpolants, 0 QuantifiedInterpolants, 912 SizeOfPredicates, 7 NumberOfNonLiveVariables, 433 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 168/205 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: 30]: Loop Invariant Derived loop invariant: (((((((__int128) a * 2) + ((__int128) a * a)) + 1) == s) && (\old(counter) == 0)) && (t == (((__int128) a * 2) + 1))) - ProcedureContractResult [Line: 21]: Procedure Contract for main Derived contract for procedure main. Requires: (counter == 0) Ensures: (\old(counter) == 0) - ProcedureContractResult [Line: 11]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (\old(cond) != 0) Ensures: (\old(cond) != 0) RESULT: Ultimate proved your program to be correct! [2024-09-15 19:42:02,836 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