./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34f640e37bae156029b1a359a4abe58394472212f3f36aea9107706542ec544a --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 12:58:23,745 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 12:58:23,816 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 12:58:23,820 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 12:58:23,823 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 12:58:23,845 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 12:58:23,845 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 12:58:23,846 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 12:58:23,846 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 12:58:23,847 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 12:58:23,847 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 12:58:23,847 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 12:58:23,848 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 12:58:23,848 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 12:58:23,849 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 12:58:23,849 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 12:58:23,849 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 12:58:23,850 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 12:58:23,850 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 12:58:23,850 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 12:58:23,851 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 12:58:23,855 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 12:58:23,855 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 12:58:23,855 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 12:58:23,856 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 12:58:23,856 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 12:58:23,856 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 12:58:23,857 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 12:58:23,857 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 12:58:23,857 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 12:58:23,858 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 12:58:23,858 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 12:58:23,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:58:23,863 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 12:58:23,863 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 12:58:23,863 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 12:58:23,863 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 12:58:23,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 12:58:23,864 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 12:58:23,864 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 12:58:23,864 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 12:58:23,865 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 12:58:23,865 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34f640e37bae156029b1a359a4abe58394472212f3f36aea9107706542ec544a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 12:58:24,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 12:58:24,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 12:58:24,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 12:58:24,161 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 12:58:24,162 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 12:58:24,163 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c [2024-09-20 12:58:25,617 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 12:58:25,813 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 12:58:25,814 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c [2024-09-20 12:58:25,821 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/283667aa3/cd499dea967d441f8b6dbce74454b372/FLAG675389639 [2024-09-20 12:58:25,835 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/283667aa3/cd499dea967d441f8b6dbce74454b372 [2024-09-20 12:58:25,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 12:58:25,839 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 12:58:25,840 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 12:58:25,840 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 12:58:25,844 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 12:58:25,844 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:58:25" (1/1) ... [2024-09-20 12:58:25,845 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24faa750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:25, skipping insertion in model container [2024-09-20 12:58:25,845 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:58:25" (1/1) ... [2024-09-20 12:58:25,865 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 12:58:26,042 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c[537,550] [2024-09-20 12:58:26,066 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:58:26,077 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 12:58:26,089 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound5.c[537,550] [2024-09-20 12:58:26,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:58:26,116 INFO L204 MainTranslator]: Completed translation [2024-09-20 12:58:26,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:26 WrapperNode [2024-09-20 12:58:26,117 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 12:58:26,119 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 12:58:26,119 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 12:58:26,119 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 12:58:26,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:26" (1/1) ... [2024-09-20 12:58:26,133 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:26" (1/1) ... [2024-09-20 12:58:26,139 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 12:58:26,140 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 12:58:26,140 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 12:58:26,140 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 12:58:26,141 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 12:58:26,174 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:26" (1/1) ... [2024-09-20 12:58:26,174 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:26" (1/1) ... [2024-09-20 12:58:26,175 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:26" (1/1) ... [2024-09-20 12:58:26,190 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]. [2024-09-20 12:58:26,192 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:26" (1/1) ... [2024-09-20 12:58:26,192 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:26" (1/1) ... [2024-09-20 12:58:26,195 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:26" (1/1) ... [2024-09-20 12:58:26,202 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:26" (1/1) ... [2024-09-20 12:58:26,202 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:26" (1/1) ... [2024-09-20 12:58:26,203 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:26" (1/1) ... [2024-09-20 12:58:26,204 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 12:58:26,205 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 12:58:26,205 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 12:58:26,205 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 12:58:26,206 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:26" (1/1) ... [2024-09-20 12:58:26,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:58:26,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:58:26,261 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) [2024-09-20 12:58:26,263 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 [2024-09-20 12:58:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 12:58:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 12:58:26,305 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 12:58:26,306 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 12:58:26,306 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 12:58:26,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 12:58:26,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 12:58:26,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 12:58:26,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 12:58:26,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 12:58:26,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 12:58:26,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 12:58:26,366 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 12:58:26,368 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 12:58:26,503 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 12:58:26,504 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 12:58:26,523 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 12:58:26,523 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 12:58:26,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:58:26 BoogieIcfgContainer [2024-09-20 12:58:26,524 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 12:58:26,526 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 12:58:26,526 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 12:58:26,529 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 12:58:26,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:58:25" (1/3) ... [2024-09-20 12:58:26,530 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6beb6e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:58:26, skipping insertion in model container [2024-09-20 12:58:26,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:58:26" (2/3) ... [2024-09-20 12:58:26,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6beb6e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:58:26, skipping insertion in model container [2024-09-20 12:58:26,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:58:26" (3/3) ... [2024-09-20 12:58:26,532 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound5.c [2024-09-20 12:58:26,548 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 12:58:26,549 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 12:58:26,599 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 12:58:26,605 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;@20646412, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 12:58:26,605 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 12:58:26,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 12:58:26,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 12:58:26,617 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:58:26,617 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:58:26,618 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:58:26,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:26,624 INFO L85 PathProgramCache]: Analyzing trace with hash -2062108722, now seen corresponding path program 1 times [2024-09-20 12:58:26,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:58:26,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196699806] [2024-09-20 12:58:26,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:26,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:58:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:26,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:58:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:26,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:58:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:26,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:58:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:26,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:58:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 12:58:26,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:58:26,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196699806] [2024-09-20 12:58:26,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196699806] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:58:26,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:58:26,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 12:58:26,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669845084] [2024-09-20 12:58:26,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:58:26,849 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 12:58:26,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:58:26,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 12:58:26,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 12:58:26,876 INFO L87 Difference]: Start difference. First operand has 30 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:58:26,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:58:26,909 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2024-09-20 12:58:26,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 12:58:26,911 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-20 12:58:26,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:58:26,919 INFO L225 Difference]: With dead ends: 54 [2024-09-20 12:58:26,920 INFO L226 Difference]: Without dead ends: 26 [2024-09-20 12:58:26,923 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 12:58:26,926 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:58:26,927 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:58:26,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-20 12:58:26,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-20 12:58:26,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 12:58:26,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-09-20 12:58:26,964 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 27 [2024-09-20 12:58:26,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:58:26,965 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-09-20 12:58:26,966 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:58:26,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:26,967 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-09-20 12:58:26,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 12:58:26,969 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:58:26,970 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:58:26,970 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 12:58:26,970 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:58:26,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:26,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1085938704, now seen corresponding path program 1 times [2024-09-20 12:58:26,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:58:26,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159499874] [2024-09-20 12:58:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:26,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:58:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:58:27,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553950779] [2024-09-20 12:58:27,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:27,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:27,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:58:27,022 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) [2024-09-20 12:58:27,024 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 12:58:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:27,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 12:58:27,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:58:27,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:58:27,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:58:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 12:58:27,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:58:27,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159499874] [2024-09-20 12:58:27,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:58:27,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553950779] [2024-09-20 12:58:27,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553950779] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 12:58:27,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:58:27,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2024-09-20 12:58:27,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87907158] [2024-09-20 12:58:27,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:58:27,432 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:58:27,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:58:27,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:58:27,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-20 12:58:27,435 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-20 12:58:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:58:27,541 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2024-09-20 12:58:27,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:58:27,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-20 12:58:27,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:58:27,544 INFO L225 Difference]: With dead ends: 37 [2024-09-20 12:58:27,544 INFO L226 Difference]: Without dead ends: 35 [2024-09-20 12:58:27,544 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:58:27,545 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:58:27,546 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 80 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:58:27,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-20 12:58:27,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2024-09-20 12:58:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 12:58:27,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-20 12:58:27,563 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 27 [2024-09-20 12:58:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:58:27,565 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-20 12:58:27,565 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-20 12:58:27,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-20 12:58:27,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 12:58:27,568 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:58:27,569 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:58:27,587 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 12:58:27,769 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:27,770 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:58:27,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:27,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1368497365, now seen corresponding path program 1 times [2024-09-20 12:58:27,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:58:27,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220760239] [2024-09-20 12:58:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:27,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:58:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:27,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:58:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:27,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:58:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:27,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:58:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:27,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:58:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:28,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 12:58:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:58:28,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:58:28,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220760239] [2024-09-20 12:58:28,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220760239] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:58:28,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:58:28,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 12:58:28,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609495335] [2024-09-20 12:58:28,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:58:28,017 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 12:58:28,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:58:28,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 12:58:28,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:58:28,019 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:58:28,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:58:28,088 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2024-09-20 12:58:28,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 12:58:28,089 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-09-20 12:58:28,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:58:28,090 INFO L225 Difference]: With dead ends: 42 [2024-09-20 12:58:28,090 INFO L226 Difference]: Without dead ends: 35 [2024-09-20 12:58:28,090 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 12:58:28,091 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:58:28,092 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:58:28,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-20 12:58:28,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2024-09-20 12:58:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 12:58:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-09-20 12:58:28,104 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 33 [2024-09-20 12:58:28,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:58:28,104 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-09-20 12:58:28,104 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:58:28,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-09-20 12:58:28,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 12:58:28,120 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:58:28,120 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:58:28,120 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 12:58:28,120 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:58:28,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:28,121 INFO L85 PathProgramCache]: Analyzing trace with hash -65395240, now seen corresponding path program 1 times [2024-09-20 12:58:28,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:58:28,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375426780] [2024-09-20 12:58:28,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:28,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:58:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:58:28,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492411741] [2024-09-20 12:58:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:28,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:28,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:58:28,192 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) [2024-09-20 12:58:28,194 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 12:58:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:28,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 12:58:28,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:58:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 12:58:28,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:58:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 12:58:30,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:58:30,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375426780] [2024-09-20 12:58:30,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:58:30,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492411741] [2024-09-20 12:58:30,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492411741] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 12:58:30,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:58:30,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2024-09-20 12:58:30,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350609147] [2024-09-20 12:58:30,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:58:30,414 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 12:58:30,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:58:30,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 12:58:30,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:58:30,417 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:58:30,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:58:30,592 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2024-09-20 12:58:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 12:58:30,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-09-20 12:58:30,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:58:30,594 INFO L225 Difference]: With dead ends: 45 [2024-09-20 12:58:30,594 INFO L226 Difference]: Without dead ends: 43 [2024-09-20 12:58:30,595 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-09-20 12:58:30,595 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:58:30,596 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 117 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:58:30,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-20 12:58:30,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-09-20 12:58:30,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 12:58:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-09-20 12:58:30,614 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2024-09-20 12:58:30,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:58:30,614 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-09-20 12:58:30,614 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 12:58:30,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:30,615 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-09-20 12:58:30,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 12:58:30,615 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:58:30,616 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:58:30,631 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 12:58:30,816 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:30,817 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:58:30,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:30,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1709612122, now seen corresponding path program 1 times [2024-09-20 12:58:30,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:58:30,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350559782] [2024-09-20 12:58:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:30,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:58:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:58:30,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936132494] [2024-09-20 12:58:30,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:30,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:30,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:58:30,844 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) [2024-09-20 12:58:30,854 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 12:58:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:30,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 12:58:30,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:58:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:58:31,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:58:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:58:31,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:58:31,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350559782] [2024-09-20 12:58:31,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:58:31,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936132494] [2024-09-20 12:58:31,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936132494] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:58:31,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:58:31,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2024-09-20 12:58:31,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404982869] [2024-09-20 12:58:31,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:58:31,921 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 12:58:31,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:58:31,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 12:58:31,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-09-20 12:58:31,926 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-20 12:58:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:58:32,587 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-09-20 12:58:32,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 12:58:32,588 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 36 [2024-09-20 12:58:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:58:32,590 INFO L225 Difference]: With dead ends: 67 [2024-09-20 12:58:32,590 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 12:58:32,591 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2024-09-20 12:58:32,592 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:58:32,592 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 161 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 12:58:32,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 12:58:32,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-20 12:58:32,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 12:58:32,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2024-09-20 12:58:32,609 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 36 [2024-09-20 12:58:32,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:58:32,609 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2024-09-20 12:58:32,610 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-20 12:58:32,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:32,610 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2024-09-20 12:58:32,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 12:58:32,611 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:58:32,611 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:58:32,628 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 12:58:32,811 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:32,814 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:58:32,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:32,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1894068381, now seen corresponding path program 1 times [2024-09-20 12:58:32,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:58:32,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175798037] [2024-09-20 12:58:32,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:32,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:58:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:58:32,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611946004] [2024-09-20 12:58:32,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:32,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:32,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:58:32,846 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) [2024-09-20 12:58:32,848 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 12:58:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:32,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 12:58:32,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:58:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 12:58:32,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:58:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 12:58:33,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:58:33,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175798037] [2024-09-20 12:58:33,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:58:33,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611946004] [2024-09-20 12:58:33,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611946004] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:58:33,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:58:33,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2024-09-20 12:58:33,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847733482] [2024-09-20 12:58:33,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:58:33,120 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 12:58:33,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:58:33,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 12:58:33,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-09-20 12:58:33,121 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-20 12:58:33,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:58:33,213 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-09-20 12:58:33,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 12:58:33,214 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 42 [2024-09-20 12:58:33,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:58:33,215 INFO L225 Difference]: With dead ends: 67 [2024-09-20 12:58:33,215 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 12:58:33,215 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:58:33,216 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:58:33,216 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 123 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:58:33,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 12:58:33,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-20 12:58:33,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 12:58:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-09-20 12:58:33,233 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 42 [2024-09-20 12:58:33,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:58:33,234 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-09-20 12:58:33,234 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-20 12:58:33,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:33,235 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-09-20 12:58:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-20 12:58:33,236 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:58:33,236 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:58:33,252 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 12:58:33,436 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:33,437 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:58:33,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:33,437 INFO L85 PathProgramCache]: Analyzing trace with hash -455011438, now seen corresponding path program 1 times [2024-09-20 12:58:33,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:58:33,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646295290] [2024-09-20 12:58:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:33,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:58:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:58:33,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130641903] [2024-09-20 12:58:33,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:33,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:33,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:58:33,471 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) [2024-09-20 12:58:33,472 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 12:58:33,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:33,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 12:58:33,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:58:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 12:58:33,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:58:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 12:58:43,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:58:43,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646295290] [2024-09-20 12:58:43,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:58:43,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130641903] [2024-09-20 12:58:43,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130641903] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:58:43,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:58:43,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2024-09-20 12:58:43,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292781070] [2024-09-20 12:58:43,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:58:43,474 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 12:58:43,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:58:43,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 12:58:43,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-09-20 12:58:43,477 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-20 12:58:51,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:58:51,366 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2024-09-20 12:58:51,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 12:58:51,367 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 45 [2024-09-20 12:58:51,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:58:51,368 INFO L225 Difference]: With dead ends: 90 [2024-09-20 12:58:51,368 INFO L226 Difference]: Without dead ends: 88 [2024-09-20 12:58:51,369 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-09-20 12:58:51,369 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:58:51,370 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 188 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-09-20 12:58:51,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-20 12:58:51,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2024-09-20 12:58:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.14) internal successors, (57), 52 states have internal predecessors, (57), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-20 12:58:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2024-09-20 12:58:51,400 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 45 [2024-09-20 12:58:51,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:58:51,401 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2024-09-20 12:58:51,401 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-20 12:58:51,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:51,401 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2024-09-20 12:58:51,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 12:58:51,403 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:58:51,403 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:58:51,429 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 12:58:51,607 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 12:58:51,608 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:58:51,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:51,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1692331952, now seen corresponding path program 2 times [2024-09-20 12:58:51,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:58:51,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883467336] [2024-09-20 12:58:51,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:51,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:58:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:52,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:58:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:52,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:58:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:52,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:58:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:52,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:58:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:52,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 12:58:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:52,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 12:58:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:52,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-20 12:58:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:52,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 12:58:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-20 12:58:52,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:58:52,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883467336] [2024-09-20 12:58:52,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883467336] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:58:52,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639618434] [2024-09-20 12:58:52,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:58:52,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:52,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:58:52,276 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:58:52,277 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 12:58:52,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:58:52,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:58:52,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 12:58:52,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:58:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 12:58:52,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:58:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-20 12:58:52,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639618434] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:58:52,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:58:52,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2024-09-20 12:58:52,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593228707] [2024-09-20 12:58:52,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:58:52,698 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 12:58:52,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:58:52,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 12:58:52,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-09-20 12:58:52,700 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-09-20 12:58:52,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:58:52,961 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2024-09-20 12:58:52,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 12:58:52,961 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) Word has length 63 [2024-09-20 12:58:52,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:58:52,962 INFO L225 Difference]: With dead ends: 115 [2024-09-20 12:58:52,962 INFO L226 Difference]: Without dead ends: 50 [2024-09-20 12:58:52,963 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2024-09-20 12:58:52,963 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:58:52,964 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 247 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:58:52,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-20 12:58:52,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-20 12:58:52,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-20 12:58:52,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-09-20 12:58:52,977 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 63 [2024-09-20 12:58:52,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:58:52,978 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-09-20 12:58:52,978 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-09-20 12:58:52,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:52,978 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-09-20 12:58:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 12:58:52,979 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:58:52,979 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:58:52,992 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 12:58:53,183 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:53,184 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:58:53,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:53,184 INFO L85 PathProgramCache]: Analyzing trace with hash 499200656, now seen corresponding path program 2 times [2024-09-20 12:58:53,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:58:53,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559607076] [2024-09-20 12:58:53,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:58:53,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:58:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:53,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:58:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:53,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:58:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:53,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 12:58:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:53,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 12:58:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:53,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 12:58:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:53,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 12:58:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:53,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-20 12:58:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:53,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 12:58:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:58:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 41 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-20 12:58:53,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:58:53,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559607076] [2024-09-20 12:58:53,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559607076] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:58:53,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456462896] [2024-09-20 12:58:53,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:58:53,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:53,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:58:53,646 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:58:53,648 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 12:58:53,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:58:53,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:58:53,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 12:58:53,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:58:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 56 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-20 12:58:53,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:58:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-20 12:58:54,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456462896] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:58:54,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:58:54,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 25 [2024-09-20 12:58:54,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228714421] [2024-09-20 12:58:54,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:58:54,916 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 12:58:54,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:58:54,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 12:58:54,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2024-09-20 12:58:54,917 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 15 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) [2024-09-20 12:58:55,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:58:55,105 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2024-09-20 12:58:55,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 12:58:55,106 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 15 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) Word has length 63 [2024-09-20 12:58:55,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:58:55,106 INFO L225 Difference]: With dead ends: 54 [2024-09-20 12:58:55,106 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 12:58:55,107 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2024-09-20 12:58:55,107 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:58:55,107 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 237 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:58:55,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 12:58:55,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 12:58:55,108 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) [2024-09-20 12:58:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 12:58:55,108 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2024-09-20 12:58:55,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:58:55,108 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 12:58:55,109 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 15 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) [2024-09-20 12:58:55,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:58:55,109 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 12:58:55,109 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 12:58:55,115 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 12:58:55,123 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 12:58:55,316 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:58:55,319 INFO L408 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1] [2024-09-20 12:58:55,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 12:58:57,105 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 12:58:57,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 12:58:57 BoogieIcfgContainer [2024-09-20 12:58:57,124 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 12:58:57,124 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-20 12:58:57,124 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-20 12:58:57,125 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-20 12:58:57,125 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:58:26" (3/4) ... [2024-09-20 12:58:57,127 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-20 12:58:57,182 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-20 12:58:57,183 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-20 12:58:57,183 INFO L158 Benchmark]: Toolchain (without parser) took 31344.54ms. Allocated memory was 169.9MB in the beginning and 245.4MB in the end (delta: 75.5MB). Free memory was 101.8MB in the beginning and 85.7MB in the end (delta: 16.1MB). Peak memory consumption was 93.5MB. Max. memory is 16.1GB. [2024-09-20 12:58:57,183 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 169.9MB. Free memory was 126.8MB in the beginning and 126.6MB in the end (delta: 155.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 12:58:57,183 INFO L158 Benchmark]: CACSL2BoogieTranslator took 277.92ms. Allocated memory is still 169.9MB. Free memory was 101.5MB in the beginning and 90.1MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-20 12:58:57,184 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.89ms. Allocated memory is still 169.9MB. Free memory was 90.1MB in the beginning and 89.2MB in the end (delta: 922.6kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 12:58:57,184 INFO L158 Benchmark]: Boogie Preprocessor took 64.12ms. Allocated memory is still 169.9MB. Free memory was 89.2MB in the beginning and 141.7MB in the end (delta: -52.6MB). Peak memory consumption was 8.1MB. Max. memory is 16.1GB. [2024-09-20 12:58:57,184 INFO L158 Benchmark]: RCFGBuilder took 319.21ms. Allocated memory is still 169.9MB. Free memory was 141.7MB in the beginning and 128.5MB in the end (delta: 13.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-20 12:58:57,184 INFO L158 Benchmark]: TraceAbstraction took 30597.97ms. Allocated memory was 169.9MB in the beginning and 245.4MB in the end (delta: 75.5MB). Free memory was 127.9MB in the beginning and 87.8MB in the end (delta: 40.1MB). Peak memory consumption was 116.9MB. Max. memory is 16.1GB. [2024-09-20 12:58:57,185 INFO L158 Benchmark]: Witness Printer took 58.27ms. Allocated memory is still 245.4MB. Free memory was 87.8MB in the beginning and 85.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 12:58:57,186 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 169.9MB. Free memory was 126.8MB in the beginning and 126.6MB in the end (delta: 155.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 277.92ms. Allocated memory is still 169.9MB. Free memory was 101.5MB in the beginning and 90.1MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.89ms. Allocated memory is still 169.9MB. Free memory was 90.1MB in the beginning and 89.2MB in the end (delta: 922.6kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 64.12ms. Allocated memory is still 169.9MB. Free memory was 89.2MB in the beginning and 141.7MB in the end (delta: -52.6MB). Peak memory consumption was 8.1MB. Max. memory is 16.1GB. * RCFGBuilder took 319.21ms. Allocated memory is still 169.9MB. Free memory was 141.7MB in the beginning and 128.5MB in the end (delta: 13.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 30597.97ms. Allocated memory was 169.9MB in the beginning and 245.4MB in the end (delta: 75.5MB). Free memory was 127.9MB in the beginning and 87.8MB in the end (delta: 40.1MB). Peak memory consumption was 116.9MB. Max. memory is 16.1GB. * Witness Printer took 58.27ms. Allocated memory is still 245.4MB. Free memory was 87.8MB in the beginning and 85.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 28.7s, OverallIterations: 9, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 9.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 102 SdHoareTripleChecker+Valid, 4.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 96 mSDsluCounter, 1272 SdHoareTripleChecker+Invalid, 3.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1065 mSDsCounter, 49 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 999 IncrementalHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 49 mSolverCounterUnsat, 207 mSDtfsCounter, 999 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 734 GetRequests, 579 SyntacticMatches, 18 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 16.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=7, InterpolantAutomatonStates: 91, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 24 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 16.6s InterpolantComputationTime, 684 NumberOfCodeBlocks, 684 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 792 ConstructedInterpolants, 1 QuantifiedInterpolants, 4429 SizeOfPredicates, 12 NumberOfNonLiveVariables, 769 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 18 InterpolantComputations, 4 PerfectInterpolantSequences, 646/710 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((((((((z + ((__int128) y * x)) == ((long long) b * a)) && (b <= 5)) && (((long long) a * 2) == x)) && (0 <= a)) && (1 <= b)) && (a <= 5)) && ((((long long) -1 + b) / 2) == y)) || ((((((z == ((long long) b * a)) && (b <= 5)) && (0 <= a)) && (1 <= b)) && (y == 0)) && (a <= 5))) || (((((((z == 0) && (b == y)) && (0 <= a)) && (1 <= y)) && (a <= 5)) && (a == x)) && (y <= 5))) || ((((((y == 1) && (b <= 5)) && (((__int128) z + x) == ((long long) b * a))) && (0 <= a)) && (1 <= b)) && (a <= 5))) || ((((((((z == 0) && (y == (b / 2))) && (b <= 5)) && (((long long) a * 2) == x)) && (0 <= a)) && ((b % 2) != 1)) && (1 <= y)) && (a <= 5))) - ProcedureContractResult [Line: 9]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 12]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-20 12:58:57,222 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