./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard-ll.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/hard-ll.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 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 --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 12:18:59,180 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 12:18:59,240 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 12:18:59,246 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 12:18:59,246 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 12:18:59,283 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 12:18:59,284 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 12:18:59,284 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 12:18:59,285 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 12:18:59,296 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 12:18:59,296 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 12:18:59,297 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 12:18:59,297 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 12:18:59,298 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 12:18:59,298 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 12:18:59,298 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 12:18:59,299 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 12:18:59,299 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 12:18:59,299 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 12:18:59,300 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 12:18:59,300 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 12:18:59,301 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 12:18:59,301 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 12:18:59,301 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 12:18:59,301 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 12:18:59,302 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 12:18:59,302 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 12:18:59,302 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 12:18:59,303 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 12:18:59,303 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 12:18:59,303 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 12:18:59,303 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 12:18:59,303 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:18:59,304 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 12:18:59,304 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 12:18:59,305 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 12:18:59,305 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 12:18:59,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 12:18:59,305 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 12:18:59,306 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 12:18:59,306 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 12:18:59,306 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 12:18:59,307 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 12:18:59,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 12:18:59,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 12:18:59,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 12:18:59,577 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 12:18:59,577 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 12:18:59,579 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/hard-ll.c [2024-09-20 12:19:01,028 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 12:19:01,209 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 12:19:01,210 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/hard-ll.c [2024-09-20 12:19:01,217 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/d78a3a123/a78c504783a5430aaed80ddc7e106980/FLAG999217950 [2024-09-20 12:19:01,610 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/d78a3a123/a78c504783a5430aaed80ddc7e106980 [2024-09-20 12:19:01,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 12:19:01,614 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 12:19:01,615 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 12:19:01,615 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 12:19:01,619 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 12:19:01,620 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:19:01" (1/1) ... [2024-09-20 12:19:01,621 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69f5607b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:19:01, skipping insertion in model container [2024-09-20 12:19:01,621 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:19:01" (1/1) ... [2024-09-20 12:19:01,642 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 12:19:01,810 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/hard-ll.c[538,551] [2024-09-20 12:19:01,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:19:01,836 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 12:19:01,845 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/hard-ll.c[538,551] [2024-09-20 12:19:01,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:19:01,871 INFO L204 MainTranslator]: Completed translation [2024-09-20 12:19:01,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:19:01 WrapperNode [2024-09-20 12:19:01,871 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 12:19:01,872 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 12:19:01,872 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 12:19:01,873 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 12:19:01,879 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:19:01" (1/1) ... [2024-09-20 12:19:01,885 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:19:01" (1/1) ... [2024-09-20 12:19:01,892 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 12:19:01,892 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 12:19:01,893 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 12:19:01,893 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 12:19:01,908 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 12:19:01,920 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:19:01" (1/1) ... [2024-09-20 12:19:01,920 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:19:01" (1/1) ... [2024-09-20 12:19:01,921 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:19:01" (1/1) ... [2024-09-20 12:19:01,934 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 12:19:01,935 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:19:01" (1/1) ... [2024-09-20 12:19:01,935 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:19:01" (1/1) ... [2024-09-20 12:19:01,938 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:19:01" (1/1) ... [2024-09-20 12:19:01,943 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:19:01" (1/1) ... [2024-09-20 12:19:01,945 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:19:01" (1/1) ... [2024-09-20 12:19:01,945 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:19:01" (1/1) ... [2024-09-20 12:19:01,947 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 12:19:01,949 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 12:19:01,949 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 12:19:01,950 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 12:19:01,951 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:19:01" (1/1) ... [2024-09-20 12:19:01,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:19:01,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:01,993 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 12:19:01,996 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 12:19:02,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 12:19:02,032 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 12:19:02,032 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 12:19:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 12:19:02,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 12:19:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 12:19:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 12:19:02,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 12:19:02,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 12:19:02,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 12:19:02,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 12:19:02,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 12:19:02,092 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 12:19:02,094 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 12:19:02,260 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-20 12:19:02,260 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 12:19:02,280 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 12:19:02,280 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 12:19:02,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:19:02 BoogieIcfgContainer [2024-09-20 12:19:02,280 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 12:19:02,283 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 12:19:02,283 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 12:19:02,287 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 12:19:02,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:19:01" (1/3) ... [2024-09-20 12:19:02,288 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509990f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:19:02, skipping insertion in model container [2024-09-20 12:19:02,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:19:01" (2/3) ... [2024-09-20 12:19:02,288 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509990f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:19:02, skipping insertion in model container [2024-09-20 12:19:02,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:19:02" (3/3) ... [2024-09-20 12:19:02,290 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll.c [2024-09-20 12:19:02,308 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 12:19:02,308 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 12:19:02,391 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 12:19:02,400 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;@54d8b1ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 12:19:02,400 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 12:19:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 12:19:02,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 12:19:02,416 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:02,417 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:02,418 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:02,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:02,424 INFO L85 PathProgramCache]: Analyzing trace with hash -909137831, now seen corresponding path program 1 times [2024-09-20 12:19:02,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:02,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676735077] [2024-09-20 12:19:02,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:02,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:02,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:19:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:02,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:19:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:19:02,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:02,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676735077] [2024-09-20 12:19:02,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676735077] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:19:02,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:19:02,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 12:19:02,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591311880] [2024-09-20 12:19:02,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:19:02,622 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 12:19:02,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:02,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 12:19:02,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 12:19:02,651 INFO L87 Difference]: Start difference. First operand has 33 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 12:19:02,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:02,685 INFO L93 Difference]: Finished difference Result 58 states and 92 transitions. [2024-09-20 12:19:02,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 12:19:02,688 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-20 12:19:02,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:02,696 INFO L225 Difference]: With dead ends: 58 [2024-09-20 12:19:02,696 INFO L226 Difference]: Without dead ends: 29 [2024-09-20 12:19:02,699 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 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 12:19:02,702 INFO L434 NwaCegarLoop]: 39 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, 39 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 12:19:02,703 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:19:02,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-20 12:19:02,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-20 12:19:02,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 12:19:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-09-20 12:19:02,741 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 16 [2024-09-20 12:19:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:02,742 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-09-20 12:19:02,742 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 12:19:02,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:02,743 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-09-20 12:19:02,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 12:19:02,744 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:02,744 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:02,744 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 12:19:02,744 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:02,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:02,745 INFO L85 PathProgramCache]: Analyzing trace with hash -229079461, now seen corresponding path program 1 times [2024-09-20 12:19:02,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:02,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933793844] [2024-09-20 12:19:02,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:02,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:02,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:19:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:02,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:19:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:19:02,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:02,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933793844] [2024-09-20 12:19:02,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933793844] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:19:02,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:19:02,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:19:02,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688305597] [2024-09-20 12:19:02,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:19:02,968 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:19:02,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:02,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:19:02,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:19:02,969 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 12:19:03,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:03,045 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2024-09-20 12:19:03,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:19:03,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-20 12:19:03,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:03,051 INFO L225 Difference]: With dead ends: 42 [2024-09-20 12:19:03,051 INFO L226 Difference]: Without dead ends: 40 [2024-09-20 12:19:03,052 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:19:03,054 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:03,055 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 114 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:19:03,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-20 12:19:03,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2024-09-20 12:19:03,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 12:19:03,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-09-20 12:19:03,068 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 16 [2024-09-20 12:19:03,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:03,069 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-09-20 12:19:03,069 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 12:19:03,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:03,069 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-09-20 12:19:03,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 12:19:03,070 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:03,070 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:03,071 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 12:19:03,071 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:03,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:03,071 INFO L85 PathProgramCache]: Analyzing trace with hash 520476838, now seen corresponding path program 1 times [2024-09-20 12:19:03,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:03,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544459912] [2024-09-20 12:19:03,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:03,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:03,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:19:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:03,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:19:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:03,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:19:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:19:03,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:03,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544459912] [2024-09-20 12:19:03,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544459912] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:19:03,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:19:03,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:19:03,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137477390] [2024-09-20 12:19:03,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:19:03,293 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:19:03,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:03,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:19:03,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:19:03,294 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:19:03,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:03,389 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2024-09-20 12:19:03,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:19:03,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-09-20 12:19:03,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:03,391 INFO L225 Difference]: With dead ends: 46 [2024-09-20 12:19:03,391 INFO L226 Difference]: Without dead ends: 44 [2024-09-20 12:19:03,391 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:19:03,394 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:03,395 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 111 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:19:03,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-20 12:19:03,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2024-09-20 12:19:03,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 12:19:03,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-09-20 12:19:03,407 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 21 [2024-09-20 12:19:03,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:03,408 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-09-20 12:19:03,408 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 12:19:03,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:03,409 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-09-20 12:19:03,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 12:19:03,411 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:03,412 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:03,412 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 12:19:03,412 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:03,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:03,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1140086011, now seen corresponding path program 1 times [2024-09-20 12:19:03,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:03,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837464734] [2024-09-20 12:19:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:03,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:19:03,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79429481] [2024-09-20 12:19:03,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:03,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:03,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:03,442 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 12:19:03,446 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 12:19:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:03,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 12:19:03,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:19:03,640 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:19:03,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:03,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837464734] [2024-09-20 12:19:03,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:19:03,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79429481] [2024-09-20 12:19:03,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79429481] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:19:03,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:19:03,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:19:03,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496717521] [2024-09-20 12:19:03,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:19:03,643 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:19:03,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:03,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:19:03,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:19:03,645 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:19:03,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:03,752 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2024-09-20 12:19:03,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:19:03,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2024-09-20 12:19:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:03,756 INFO L225 Difference]: With dead ends: 63 [2024-09-20 12:19:03,756 INFO L226 Difference]: Without dead ends: 50 [2024-09-20 12:19:03,756 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:19:03,760 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:03,761 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 113 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:19:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-20 12:19:03,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-20 12:19:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-20 12:19:03,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2024-09-20 12:19:03,783 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 26 [2024-09-20 12:19:03,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:03,784 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2024-09-20 12:19:03,784 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 12:19:03,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:03,786 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2024-09-20 12:19:03,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 12:19:03,788 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:03,788 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:03,806 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 12:19:03,992 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:03,993 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:03,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:03,994 INFO L85 PathProgramCache]: Analyzing trace with hash -975701997, now seen corresponding path program 1 times [2024-09-20 12:19:03,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:03,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588311833] [2024-09-20 12:19:03,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:03,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:19:04,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787761593] [2024-09-20 12:19:04,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:04,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:04,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:04,023 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 12:19:04,028 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 12:19:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:04,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-20 12:19:04,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:19:04,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:19:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:19:04,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:04,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588311833] [2024-09-20 12:19:04,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:19:04,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787761593] [2024-09-20 12:19:04,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787761593] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:19:04,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:19:04,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-20 12:19:04,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190913413] [2024-09-20 12:19:04,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:19:04,417 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 12:19:04,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:04,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 12:19:04,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-20 12:19:04,418 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 12:19:04,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:04,574 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-09-20 12:19:04,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 12:19:04,575 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2024-09-20 12:19:04,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:04,578 INFO L225 Difference]: With dead ends: 65 [2024-09-20 12:19:04,581 INFO L226 Difference]: Without dead ends: 63 [2024-09-20 12:19:04,581 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:19:04,582 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:04,582 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 140 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:19:04,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-20 12:19:04,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2024-09-20 12:19:04,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 36 states have internal predecessors, (41), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 12:19:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2024-09-20 12:19:04,599 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 33 [2024-09-20 12:19:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:04,600 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2024-09-20 12:19:04,600 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 12:19:04,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2024-09-20 12:19:04,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 12:19:04,602 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:04,602 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:04,620 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 12:19:04,802 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:04,803 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:04,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:04,803 INFO L85 PathProgramCache]: Analyzing trace with hash -928833564, now seen corresponding path program 1 times [2024-09-20 12:19:04,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:04,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384052690] [2024-09-20 12:19:04,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:04,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:19:04,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680764491] [2024-09-20 12:19:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:04,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:04,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:04,830 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 12:19:04,831 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 12:19:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:04,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 12:19:04,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 12:19:04,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:19:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-20 12:19:05,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:05,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384052690] [2024-09-20 12:19:05,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:19:05,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680764491] [2024-09-20 12:19:05,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680764491] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 12:19:05,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:19:05,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-20 12:19:05,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545364111] [2024-09-20 12:19:05,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:19:05,090 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:19:05,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:05,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:19:05,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 12:19:05,091 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 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 12:19:05,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:05,171 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2024-09-20 12:19:05,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:19:05,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 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 43 [2024-09-20 12:19:05,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:05,173 INFO L225 Difference]: With dead ends: 70 [2024-09-20 12:19:05,173 INFO L226 Difference]: Without dead ends: 68 [2024-09-20 12:19:05,174 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-20 12:19:05,174 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:05,174 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 106 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:19:05,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-20 12:19:05,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-09-20 12:19:05,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-20 12:19:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2024-09-20 12:19:05,202 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 43 [2024-09-20 12:19:05,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:05,203 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2024-09-20 12:19:05,203 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 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 12:19:05,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:05,204 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2024-09-20 12:19:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 12:19:05,205 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:05,205 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:05,223 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 12:19:05,405 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 12:19:05,406 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:05,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:05,407 INFO L85 PathProgramCache]: Analyzing trace with hash -238148106, now seen corresponding path program 1 times [2024-09-20 12:19:05,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:05,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063566076] [2024-09-20 12:19:05,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:05,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:05,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:19:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:05,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:19:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:05,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:19:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:05,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:19:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:05,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:19:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:05,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:19:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:05,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:19:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:05,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-20 12:19:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 12:19:05,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:05,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063566076] [2024-09-20 12:19:05,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063566076] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:19:05,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:19:05,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 12:19:05,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956719312] [2024-09-20 12:19:05,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:19:05,574 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:19:05,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:05,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:19:05,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:19:05,575 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-20 12:19:05,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:05,636 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2024-09-20 12:19:05,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:19:05,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-09-20 12:19:05,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:05,640 INFO L225 Difference]: With dead ends: 75 [2024-09-20 12:19:05,641 INFO L226 Difference]: Without dead ends: 63 [2024-09-20 12:19:05,641 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:19:05,642 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:05,643 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:19:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-20 12:19:05,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-20 12:19:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 39 states have internal predecessors, (42), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 12:19:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2024-09-20 12:19:05,662 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 49 [2024-09-20 12:19:05,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:05,662 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2024-09-20 12:19:05,663 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-20 12:19:05,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:05,663 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2024-09-20 12:19:05,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-20 12:19:05,664 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:05,664 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:05,664 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-20 12:19:05,664 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:05,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:05,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1374799408, now seen corresponding path program 1 times [2024-09-20 12:19:05,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:05,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047662691] [2024-09-20 12:19:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:05,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:19:05,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811031264] [2024-09-20 12:19:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:05,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:05,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:05,700 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 12:19:05,701 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 12:19:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:05,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-20 12:19:05,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-20 12:19:06,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:19:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-20 12:19:08,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:08,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047662691] [2024-09-20 12:19:08,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:19:08,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811031264] [2024-09-20 12:19:08,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811031264] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:19:08,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:19:08,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-09-20 12:19:08,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475531930] [2024-09-20 12:19:08,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:19:08,266 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 12:19:08,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:08,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 12:19:08,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-09-20 12:19:08,268 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-20 12:19:09,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:09,552 INFO L93 Difference]: Finished difference Result 150 states and 205 transitions. [2024-09-20 12:19:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 12:19:09,553 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 63 [2024-09-20 12:19:09,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:09,555 INFO L225 Difference]: With dead ends: 150 [2024-09-20 12:19:09,556 INFO L226 Difference]: Without dead ends: 127 [2024-09-20 12:19:09,556 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2024-09-20 12:19:09,557 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 76 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:09,557 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 244 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 12:19:09,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-20 12:19:09,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 102. [2024-09-20 12:19:09,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 64 states have internal predecessors, (71), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (27), 24 states have call predecessors, (27), 27 states have call successors, (27) [2024-09-20 12:19:09,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 127 transitions. [2024-09-20 12:19:09,608 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 127 transitions. Word has length 63 [2024-09-20 12:19:09,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:09,609 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 127 transitions. [2024-09-20 12:19:09,609 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-09-20 12:19:09,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:09,610 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 127 transitions. [2024-09-20 12:19:09,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-20 12:19:09,614 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:09,614 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:09,632 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 12:19:09,818 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:09,819 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:09,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:09,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2048390162, now seen corresponding path program 1 times [2024-09-20 12:19:09,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:09,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888077399] [2024-09-20 12:19:09,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:09,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:19:09,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569162656] [2024-09-20 12:19:09,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:09,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:09,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:09,857 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 12:19:09,865 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 12:19:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:09,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 12:19:09,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-20 12:19:10,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:19:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-20 12:19:11,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:11,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888077399] [2024-09-20 12:19:11,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:19:11,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569162656] [2024-09-20 12:19:11,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569162656] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:19:11,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:19:11,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-09-20 12:19:11,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202165863] [2024-09-20 12:19:11,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:19:11,056 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 12:19:11,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:11,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 12:19:11,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-09-20 12:19:11,058 INFO L87 Difference]: Start difference. First operand 102 states and 127 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2024-09-20 12:19:11,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:11,607 INFO L93 Difference]: Finished difference Result 142 states and 175 transitions. [2024-09-20 12:19:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 12:19:11,608 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) Word has length 74 [2024-09-20 12:19:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:11,610 INFO L225 Difference]: With dead ends: 142 [2024-09-20 12:19:11,610 INFO L226 Difference]: Without dead ends: 108 [2024-09-20 12:19:11,611 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2024-09-20 12:19:11,612 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:11,612 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 359 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:19:11,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-20 12:19:11,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2024-09-20 12:19:11,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 58 states have internal predecessors, (65), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-20 12:19:11,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2024-09-20 12:19:11,654 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 74 [2024-09-20 12:19:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:11,654 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2024-09-20 12:19:11,654 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2024-09-20 12:19:11,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2024-09-20 12:19:11,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-20 12:19:11,660 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:11,660 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:11,678 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 12:19:11,861 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:11,862 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:11,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:11,862 INFO L85 PathProgramCache]: Analyzing trace with hash -739625270, now seen corresponding path program 2 times [2024-09-20 12:19:11,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:11,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327187400] [2024-09-20 12:19:11,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:11,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:19:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:19:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:19:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:19:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:19:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:19:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:19:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 12:19:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 12:19:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 12:19:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 12:19:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-20 12:19:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-20 12:19:12,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:12,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327187400] [2024-09-20 12:19:12,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327187400] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:19:12,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27754425] [2024-09-20 12:19:12,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:19:12,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:12,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:12,176 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 12:19:12,178 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 12:19:12,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:19:12,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:19:12,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 12:19:12,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-20 12:19:12,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:19:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-20 12:19:12,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27754425] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:19:12,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:19:12,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-09-20 12:19:12,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432588282] [2024-09-20 12:19:12,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:19:12,367 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:19:12,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:12,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:19:12,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:19:12,368 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2024-09-20 12:19:12,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:12,464 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2024-09-20 12:19:12,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 12:19:12,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 76 [2024-09-20 12:19:12,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:12,469 INFO L225 Difference]: With dead ends: 121 [2024-09-20 12:19:12,469 INFO L226 Difference]: Without dead ends: 99 [2024-09-20 12:19:12,469 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:19:12,470 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:12,470 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:19:12,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-20 12:19:12,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-09-20 12:19:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.152542372881356) internal successors, (68), 61 states have internal predecessors, (68), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-20 12:19:12,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2024-09-20 12:19:12,504 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 76 [2024-09-20 12:19:12,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:12,505 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2024-09-20 12:19:12,505 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2024-09-20 12:19:12,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:12,505 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2024-09-20 12:19:12,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-20 12:19:12,507 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:12,507 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:12,525 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 12:19:12,707 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 12:19:12,708 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:12,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:12,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1556827571, now seen corresponding path program 1 times [2024-09-20 12:19:12,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:12,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836294091] [2024-09-20 12:19:12,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:12,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:19:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:19:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:19:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:19:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:19:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:19:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:12,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:19:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:13,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 12:19:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:13,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 12:19:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:13,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 12:19:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:13,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 12:19:13,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:13,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-20 12:19:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:13,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 12:19:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-20 12:19:13,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:13,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836294091] [2024-09-20 12:19:13,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836294091] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:19:13,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161430927] [2024-09-20 12:19:13,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:13,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:13,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:13,055 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 12:19:13,057 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 12:19:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:13,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 12:19:13,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-20 12:19:13,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:19:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-20 12:19:13,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161430927] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:19:13,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:19:13,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 18 [2024-09-20 12:19:13,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876640480] [2024-09-20 12:19:13,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:19:13,816 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 12:19:13,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:13,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 12:19:13,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-09-20 12:19:13,817 INFO L87 Difference]: Start difference. First operand 99 states and 120 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2024-09-20 12:19:14,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:14,118 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2024-09-20 12:19:14,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 12:19:14,119 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) Word has length 79 [2024-09-20 12:19:14,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:14,120 INFO L225 Difference]: With dead ends: 114 [2024-09-20 12:19:14,120 INFO L226 Difference]: Without dead ends: 97 [2024-09-20 12:19:14,121 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-09-20 12:19:14,121 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 22 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:14,122 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 338 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:19:14,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-20 12:19:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2024-09-20 12:19:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 56 states have internal predecessors, (62), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-20 12:19:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2024-09-20 12:19:14,166 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 79 [2024-09-20 12:19:14,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:14,167 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2024-09-20 12:19:14,167 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2024-09-20 12:19:14,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:14,168 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2024-09-20 12:19:14,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-20 12:19:14,171 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:14,171 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 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, 1] [2024-09-20 12:19:14,189 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 12:19:14,375 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:14,376 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:14,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:14,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1075113258, now seen corresponding path program 1 times [2024-09-20 12:19:14,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:14,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399927615] [2024-09-20 12:19:14,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:14,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:14,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:19:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:14,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:19:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:14,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:19:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:14,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:19:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:14,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:19:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:14,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:19:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:14,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:19:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:14,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 12:19:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:14,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 12:19:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:14,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 12:19:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:14,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-20 12:19:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:14,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 12:19:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:14,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 12:19:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:14,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-20 12:19:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-20 12:19:14,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:14,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399927615] [2024-09-20 12:19:14,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399927615] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:19:14,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334376729] [2024-09-20 12:19:14,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:14,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:14,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:14,516 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:19:14,517 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 12:19:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:14,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-20 12:19:14,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-20 12:19:14,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 12:19:14,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334376729] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:19:14,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 12:19:14,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-09-20 12:19:14,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206139625] [2024-09-20 12:19:14,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:19:14,608 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:19:14,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:14,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:19:14,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:19:14,609 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-20 12:19:14,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:14,686 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2024-09-20 12:19:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:19:14,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 83 [2024-09-20 12:19:14,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:14,688 INFO L225 Difference]: With dead ends: 97 [2024-09-20 12:19:14,688 INFO L226 Difference]: Without dead ends: 85 [2024-09-20 12:19:14,689 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-20 12:19:14,689 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 5 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:14,690 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 105 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:19:14,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-20 12:19:14,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-09-20 12:19:14,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 52 states have internal predecessors, (57), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-20 12:19:14,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2024-09-20 12:19:14,720 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 83 [2024-09-20 12:19:14,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:14,720 INFO L474 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2024-09-20 12:19:14,720 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-20 12:19:14,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:14,721 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2024-09-20 12:19:14,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-09-20 12:19:14,722 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:14,722 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:14,740 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 12:19:14,922 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:14,923 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:14,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:14,923 INFO L85 PathProgramCache]: Analyzing trace with hash -802122381, now seen corresponding path program 3 times [2024-09-20 12:19:14,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:14,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732161225] [2024-09-20 12:19:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:14,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:19:14,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601118482] [2024-09-20 12:19:14,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:19:14,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:14,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:14,960 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:19:14,963 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 12:19:15,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 12:19:15,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:19:15,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 12:19:15,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-20 12:19:15,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:19:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-20 12:19:28,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:28,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732161225] [2024-09-20 12:19:28,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:19:28,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601118482] [2024-09-20 12:19:28,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601118482] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:19:28,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:19:28,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2024-09-20 12:19:28,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128212017] [2024-09-20 12:19:28,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:19:28,807 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 12:19:28,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:28,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 12:19:28,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-09-20 12:19:28,809 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 17 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2024-09-20 12:19:34,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-20 12:19:35,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:35,135 INFO L93 Difference]: Finished difference Result 165 states and 216 transitions. [2024-09-20 12:19:35,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 12:19:35,135 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 17 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) Word has length 93 [2024-09-20 12:19:35,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:35,137 INFO L225 Difference]: With dead ends: 165 [2024-09-20 12:19:35,137 INFO L226 Difference]: Without dead ends: 143 [2024-09-20 12:19:35,137 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2024-09-20 12:19:35,138 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 69 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:35,138 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 409 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-20 12:19:35,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-20 12:19:35,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 128. [2024-09-20 12:19:35,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 76 states have (on average 1.144736842105263) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2024-09-20 12:19:35,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 159 transitions. [2024-09-20 12:19:35,192 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 159 transitions. Word has length 93 [2024-09-20 12:19:35,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:35,192 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 159 transitions. [2024-09-20 12:19:35,194 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 17 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2024-09-20 12:19:35,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:35,195 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 159 transitions. [2024-09-20 12:19:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-20 12:19:35,196 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:35,196 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:35,216 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 12:19:35,396 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-20 12:19:35,397 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:35,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:35,397 INFO L85 PathProgramCache]: Analyzing trace with hash 644553835, now seen corresponding path program 2 times [2024-09-20 12:19:35,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:35,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422524802] [2024-09-20 12:19:35,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:35,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:19:35,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285496092] [2024-09-20 12:19:35,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:19:35,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:35,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:35,456 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:19:35,459 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 12:19:35,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:19:35,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:19:35,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-20 12:19:35,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-20 12:19:36,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:19:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-20 12:19:46,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:46,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422524802] [2024-09-20 12:19:46,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 12:19:46,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285496092] [2024-09-20 12:19:46,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285496092] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:19:46,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 12:19:46,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2024-09-20 12:19:46,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971958755] [2024-09-20 12:19:46,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 12:19:46,339 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-20 12:19:46,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:46,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-20 12:19:46,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-09-20 12:19:46,341 INFO L87 Difference]: Start difference. First operand 128 states and 159 transitions. Second operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 23 states have internal predecessors, (46), 15 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 14 states have call predecessors, (33), 13 states have call successors, (33) [2024-09-20 12:19:49,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:49,343 INFO L93 Difference]: Finished difference Result 151 states and 189 transitions. [2024-09-20 12:19:49,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 12:19:49,344 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.84) internal successors, (46), 23 states have internal predecessors, (46), 15 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 14 states have call predecessors, (33), 13 states have call successors, (33) Word has length 104 [2024-09-20 12:19:49,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:49,346 INFO L225 Difference]: With dead ends: 151 [2024-09-20 12:19:49,346 INFO L226 Difference]: Without dead ends: 149 [2024-09-20 12:19:49,347 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 12:19:49,347 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 55 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:49,347 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 551 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-20 12:19:49,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-09-20 12:19:49,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 141. [2024-09-20 12:19:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 88 states have internal predecessors, (96), 40 states have call successors, (40), 17 states have call predecessors, (40), 16 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2024-09-20 12:19:49,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 174 transitions. [2024-09-20 12:19:49,403 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 174 transitions. Word has length 104 [2024-09-20 12:19:49,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:49,404 INFO L474 AbstractCegarLoop]: Abstraction has 141 states and 174 transitions. [2024-09-20 12:19:49,404 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.84) internal successors, (46), 23 states have internal predecessors, (46), 15 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 14 states have call predecessors, (33), 13 states have call successors, (33) [2024-09-20 12:19:49,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:49,405 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 174 transitions. [2024-09-20 12:19:49,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-09-20 12:19:49,406 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:49,406 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:49,424 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-20 12:19:49,610 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 12:19:49,611 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:49,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:49,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1609243655, now seen corresponding path program 4 times [2024-09-20 12:19:49,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:49,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242324354] [2024-09-20 12:19:49,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:49,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:49,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:19:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:49,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:19:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:49,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:19:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:49,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:19:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:49,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:19:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:49,893 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:19:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:49,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:19:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:49,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 12:19:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:49,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 12:19:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:49,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 12:19:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:49,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-20 12:19:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:49,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 12:19:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:49,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 12:19:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:49,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-20 12:19:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:49,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-20 12:19:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:49,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-20 12:19:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:49,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-20 12:19:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-20 12:19:49,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:49,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242324354] [2024-09-20 12:19:49,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242324354] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:19:49,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581616727] [2024-09-20 12:19:49,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:19:49,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:49,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:49,941 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:19:49,942 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 12:19:50,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:19:50,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:19:50,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 12:19:50,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-20 12:19:50,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:19:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-20 12:19:50,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581616727] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:19:50,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:19:50,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-09-20 12:19:50,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830624882] [2024-09-20 12:19:50,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:19:50,258 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 12:19:50,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:50,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 12:19:50,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 12:19:50,259 INFO L87 Difference]: Start difference. First operand 141 states and 174 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2024-09-20 12:19:50,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:50,417 INFO L93 Difference]: Finished difference Result 163 states and 203 transitions. [2024-09-20 12:19:50,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 12:19:50,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) Word has length 106 [2024-09-20 12:19:50,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:50,419 INFO L225 Difference]: With dead ends: 163 [2024-09-20 12:19:50,419 INFO L226 Difference]: Without dead ends: 141 [2024-09-20 12:19:50,420 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 12:19:50,420 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:50,421 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 247 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:19:50,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-09-20 12:19:50,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2024-09-20 12:19:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 88 states have internal predecessors, (94), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-20 12:19:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 170 transitions. [2024-09-20 12:19:50,490 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 170 transitions. Word has length 106 [2024-09-20 12:19:50,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:50,491 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 170 transitions. [2024-09-20 12:19:50,491 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2024-09-20 12:19:50,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:50,492 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 170 transitions. [2024-09-20 12:19:50,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-20 12:19:50,494 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:50,494 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:50,513 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 12:19:50,695 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 12:19:50,695 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:50,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:50,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1191181482, now seen corresponding path program 2 times [2024-09-20 12:19:50,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:50,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222295471] [2024-09-20 12:19:50,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:50,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:19:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:19:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:19:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:19:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:19:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:19:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:19:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 12:19:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 12:19:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 12:19:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-20 12:19:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 12:19:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 12:19:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-20 12:19:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-20 12:19:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-20 12:19:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-20 12:19:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-20 12:19:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-20 12:19:51,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:51,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222295471] [2024-09-20 12:19:51,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222295471] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:19:51,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402919290] [2024-09-20 12:19:51,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:19:51,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:51,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:51,192 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:19:51,193 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 12:19:51,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:19:51,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:19:51,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-20 12:19:51,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-20 12:19:51,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:19:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-20 12:19:52,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402919290] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:19:52,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:19:52,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 10] total 25 [2024-09-20 12:19:52,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334204420] [2024-09-20 12:19:52,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:19:52,538 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 12:19:52,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:52,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 12:19:52,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2024-09-20 12:19:52,539 INFO L87 Difference]: Start difference. First operand 139 states and 170 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 17 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 18 states have call predecessors, (48), 17 states have call successors, (48) [2024-09-20 12:19:53,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:53,137 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2024-09-20 12:19:53,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 12:19:53,138 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 17 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 18 states have call predecessors, (48), 17 states have call successors, (48) Word has length 109 [2024-09-20 12:19:53,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:53,139 INFO L225 Difference]: With dead ends: 157 [2024-09-20 12:19:53,139 INFO L226 Difference]: Without dead ends: 121 [2024-09-20 12:19:53,140 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2024-09-20 12:19:53,140 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 32 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:53,141 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 563 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:19:53,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-20 12:19:53,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2024-09-20 12:19:53,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 71 states have internal predecessors, (77), 31 states have call successors, (31), 15 states have call predecessors, (31), 14 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-20 12:19:53,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2024-09-20 12:19:53,186 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 109 [2024-09-20 12:19:53,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:53,186 INFO L474 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2024-09-20 12:19:53,186 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 17 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 18 states have call predecessors, (48), 17 states have call successors, (48) [2024-09-20 12:19:53,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:53,187 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2024-09-20 12:19:53,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-20 12:19:53,188 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:53,188 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:53,206 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 12:19:53,388 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 12:19:53,389 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:53,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:53,389 INFO L85 PathProgramCache]: Analyzing trace with hash 961958804, now seen corresponding path program 3 times [2024-09-20 12:19:53,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:53,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382738607] [2024-09-20 12:19:53,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:53,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:19:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 12:19:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-20 12:19:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 12:19:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 12:19:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 12:19:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-20 12:19:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-20 12:19:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-20 12:19:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-20 12:19:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-20 12:19:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 12:19:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 12:19:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-20 12:19:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-20 12:19:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-20 12:19:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-20 12:19:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-20 12:19:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-20 12:19:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-20 12:19:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:19:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 51 proven. 28 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-20 12:19:53,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:19:53,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382738607] [2024-09-20 12:19:53,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382738607] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:19:53,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659447258] [2024-09-20 12:19:53,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:19:53,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:53,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:53,632 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:19:53,634 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 12:19:53,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 12:19:53,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:19:53,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-20 12:19:53,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 132 proven. 4 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2024-09-20 12:19:53,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:19:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2024-09-20 12:19:54,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659447258] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:19:54,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:19:54,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 8] total 21 [2024-09-20 12:19:54,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055759576] [2024-09-20 12:19:54,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:19:54,190 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 12:19:54,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:19:54,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 12:19:54,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2024-09-20 12:19:54,191 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 21 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 11 states have call successors, (36), 4 states have call predecessors, (36), 3 states have return successors, (35), 10 states have call predecessors, (35), 8 states have call successors, (35) [2024-09-20 12:19:55,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:19:55,392 INFO L93 Difference]: Finished difference Result 142 states and 165 transitions. [2024-09-20 12:19:55,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 12:19:55,393 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 11 states have call successors, (36), 4 states have call predecessors, (36), 3 states have return successors, (35), 10 states have call predecessors, (35), 8 states have call successors, (35) Word has length 121 [2024-09-20 12:19:55,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:19:55,394 INFO L225 Difference]: With dead ends: 142 [2024-09-20 12:19:55,394 INFO L226 Difference]: Without dead ends: 134 [2024-09-20 12:19:55,395 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 12:19:55,396 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 28 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 12:19:55,396 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 441 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 12:19:55,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-09-20 12:19:55,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2024-09-20 12:19:55,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 83 states have (on average 1.108433734939759) internal successors, (92), 85 states have internal predecessors, (92), 32 states have call successors, (32), 19 states have call predecessors, (32), 18 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-20 12:19:55,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 154 transitions. [2024-09-20 12:19:55,442 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 154 transitions. Word has length 121 [2024-09-20 12:19:55,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:19:55,443 INFO L474 AbstractCegarLoop]: Abstraction has 134 states and 154 transitions. [2024-09-20 12:19:55,443 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 11 states have call successors, (36), 4 states have call predecessors, (36), 3 states have return successors, (35), 10 states have call predecessors, (35), 8 states have call successors, (35) [2024-09-20 12:19:55,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:55,443 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 154 transitions. [2024-09-20 12:19:55,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-09-20 12:19:55,444 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:19:55,444 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:19:55,462 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-20 12:19:55,645 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 12:19:55,645 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:19:55,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:19:55,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1692740848, now seen corresponding path program 5 times [2024-09-20 12:19:55,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:19:55,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490983005] [2024-09-20 12:19:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:19:55,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:19:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 12:19:55,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145764569] [2024-09-20 12:19:55,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:19:55,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:19:55,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:19:55,706 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 12:19:55,707 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 12:19:55,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-20 12:19:55,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:19:55,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-20 12:19:55,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:19:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 71 proven. 67 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-09-20 12:19:56,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:20:34,185 WARN L293 SmtUtils]: Spent 5.91s on a formula simplification that was a NOOP. DAG size: 382 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:22:57,054 WARN L293 SmtUtils]: Spent 1.28m on a formula simplification. DAG size of input: 344 DAG size of output: 338 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)