./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.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 6977cec8a403ff3f16926270da45a38f7b1f51a39c72ba3797fb74b9637fd796 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 20:07:44,287 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 20:07:44,363 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 20:07:44,370 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 20:07:44,372 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 20:07:44,412 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 20:07:44,413 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 20:07:44,414 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 20:07:44,415 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 20:07:44,415 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 20:07:44,416 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 20:07:44,416 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 20:07:44,417 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 20:07:44,418 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 20:07:44,419 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 20:07:44,419 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 20:07:44,419 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 20:07:44,420 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 20:07:44,420 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 20:07:44,423 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 20:07:44,424 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 20:07:44,424 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 20:07:44,424 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 20:07:44,425 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 20:07:44,425 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 20:07:44,425 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 20:07:44,425 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 20:07:44,426 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 20:07:44,426 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 20:07:44,426 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 20:07:44,426 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 20:07:44,426 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 20:07:44,427 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:07:44,427 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 20:07:44,427 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 20:07:44,428 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 20:07:44,428 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 20:07:44,429 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 20:07:44,429 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 20:07:44,430 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 20:07:44,430 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 20:07:44,430 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 20:07:44,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6977cec8a403ff3f16926270da45a38f7b1f51a39c72ba3797fb74b9637fd796 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 20:07:44,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 20:07:44,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 20:07:44,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 20:07:44,699 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 20:07:44,700 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 20:07:44,701 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c [2024-09-11 20:07:46,085 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 20:07:46,271 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 20:07:46,272 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c [2024-09-11 20:07:46,281 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/17a40970e/b579bbd181194c6aad5c696a2a29d6d7/FLAG92e50f319 [2024-09-11 20:07:46,653 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/17a40970e/b579bbd181194c6aad5c696a2a29d6d7 [2024-09-11 20:07:46,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 20:07:46,657 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 20:07:46,659 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 20:07:46,659 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 20:07:46,663 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 20:07:46,663 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:07:46" (1/1) ... [2024-09-11 20:07:46,664 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18ddf8f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:07:46, skipping insertion in model container [2024-09-11 20:07:46,664 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:07:46" (1/1) ... [2024-09-11 20:07:46,680 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 20:07:46,833 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c[538,551] [2024-09-11 20:07:46,855 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:07:46,862 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 20:07:46,875 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound20.c[538,551] [2024-09-11 20:07:46,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:07:46,897 INFO L204 MainTranslator]: Completed translation [2024-09-11 20:07:46,898 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:07:46 WrapperNode [2024-09-11 20:07:46,898 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 20:07:46,899 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 20:07:46,899 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 20:07:46,899 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 20:07:46,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:07:46" (1/1) ... [2024-09-11 20:07:46,916 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:07:46" (1/1) ... [2024-09-11 20:07:46,935 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2024-09-11 20:07:46,935 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 20:07:46,936 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 20:07:46,936 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 20:07:46,936 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 20:07:46,945 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:07:46" (1/1) ... [2024-09-11 20:07:46,945 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:07:46" (1/1) ... [2024-09-11 20:07:46,946 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:07:46" (1/1) ... [2024-09-11 20:07:46,957 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]. [2024-09-11 20:07:46,957 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:07:46" (1/1) ... [2024-09-11 20:07:46,957 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:07:46" (1/1) ... [2024-09-11 20:07:46,960 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:07:46" (1/1) ... [2024-09-11 20:07:46,963 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:07:46" (1/1) ... [2024-09-11 20:07:46,964 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:07:46" (1/1) ... [2024-09-11 20:07:46,965 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:07:46" (1/1) ... [2024-09-11 20:07:46,966 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 20:07:46,968 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 20:07:46,968 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 20:07:46,968 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 20:07:46,969 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:07:46" (1/1) ... [2024-09-11 20:07:46,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:07:46,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:07:47,001 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) [2024-09-11 20:07:47,005 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 [2024-09-11 20:07:47,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 20:07:47,053 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-11 20:07:47,053 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-11 20:07:47,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 20:07:47,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 20:07:47,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 20:07:47,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 20:07:47,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 20:07:47,118 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 20:07:47,120 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 20:07:47,291 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-11 20:07:47,291 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 20:07:47,321 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 20:07:47,321 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-11 20:07:47,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:07:47 BoogieIcfgContainer [2024-09-11 20:07:47,322 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 20:07:47,324 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 20:07:47,324 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 20:07:47,327 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 20:07:47,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:07:46" (1/3) ... [2024-09-11 20:07:47,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abdbac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:07:47, skipping insertion in model container [2024-09-11 20:07:47,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:07:46" (2/3) ... [2024-09-11 20:07:47,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abdbac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:07:47, skipping insertion in model container [2024-09-11 20:07:47,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:07:47" (3/3) ... [2024-09-11 20:07:47,331 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound20.c [2024-09-11 20:07:47,348 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 20:07:47,348 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 20:07:47,408 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 20:07:47,414 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;@2dfcab55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 20:07:47,414 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 20:07:47,419 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-11 20:07:47,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-11 20:07:47,427 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:07:47,427 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:07:47,428 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:07:47,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:47,433 INFO L85 PathProgramCache]: Analyzing trace with hash 760957734, now seen corresponding path program 1 times [2024-09-11 20:07:47,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:07:47,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404479024] [2024-09-11 20:07:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:47,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:07:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:47,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:07:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:47,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:07:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:47,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 20:07:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 20:07:47,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:07:47,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404479024] [2024-09-11 20:07:47,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404479024] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:07:47,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:07:47,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 20:07:47,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990299134] [2024-09-11 20:07:47,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:07:47,646 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 20:07:47,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:07:47,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 20:07:47,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 20:07:47,666 INFO L87 Difference]: Start difference. First operand has 30 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-11 20:07:47,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:07:47,696 INFO L93 Difference]: Finished difference Result 58 states and 99 transitions. [2024-09-11 20:07:47,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 20:07:47,698 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-09-11 20:07:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:07:47,705 INFO L225 Difference]: With dead ends: 58 [2024-09-11 20:07:47,705 INFO L226 Difference]: Without dead ends: 28 [2024-09-11 20:07:47,708 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 20:07:47,711 INFO L434 NwaCegarLoop]: 38 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, 38 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 [2024-09-11 20:07:47,711 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:07:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-11 20:07:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-09-11 20:07:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-11 20:07:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2024-09-11 20:07:47,746 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 23 [2024-09-11 20:07:47,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:07:47,746 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2024-09-11 20:07:47,746 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), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-11 20:07:47,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:47,751 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2024-09-11 20:07:47,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-11 20:07:47,752 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:07:47,753 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:07:47,753 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 20:07:47,753 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:07:47,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:47,754 INFO L85 PathProgramCache]: Analyzing trace with hash -387749596, now seen corresponding path program 1 times [2024-09-11 20:07:47,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:07:47,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197945901] [2024-09-11 20:07:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:47,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:07:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:47,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:07:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:47,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:07:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:48,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 20:07:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 20:07:48,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:07:48,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197945901] [2024-09-11 20:07:48,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197945901] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:07:48,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:07:48,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 20:07:48,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266272410] [2024-09-11 20:07:48,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:07:48,019 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 20:07:48,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:07:48,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 20:07:48,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 20:07:48,021 INFO L87 Difference]: Start difference. First operand 28 states and 38 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, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-11 20:07:48,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:07:48,103 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2024-09-11 20:07:48,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 20:07:48,104 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, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2024-09-11 20:07:48,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:07:48,105 INFO L225 Difference]: With dead ends: 41 [2024-09-11 20:07:48,106 INFO L226 Difference]: Without dead ends: 39 [2024-09-11 20:07:48,106 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 [2024-09-11 20:07:48,107 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:07:48,108 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 119 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:07:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-11 20:07:48,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2024-09-11 20:07:48,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-11 20:07:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-09-11 20:07:48,129 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2024-09-11 20:07:48,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:07:48,132 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-09-11 20:07:48,132 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, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-11 20:07:48,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:48,133 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-09-11 20:07:48,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-11 20:07:48,133 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:07:48,134 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:07:48,134 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-11 20:07:48,134 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:07:48,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:48,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1391236353, now seen corresponding path program 1 times [2024-09-11 20:07:48,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:07:48,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646384884] [2024-09-11 20:07:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:48,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:07:48,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:48,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:07:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:48,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:07:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:48,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 20:07:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:48,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:07:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 20:07:48,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:07:48,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646384884] [2024-09-11 20:07:48,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646384884] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:07:48,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:07:48,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 20:07:48,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796505285] [2024-09-11 20:07:48,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:07:48,317 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 20:07:48,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:07:48,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 20:07:48,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 20:07:48,319 INFO L87 Difference]: Start difference. First operand 32 states and 41 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, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 20:07:48,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:07:48,384 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2024-09-11 20:07:48,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 20:07:48,385 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, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-09-11 20:07:48,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:07:48,387 INFO L225 Difference]: With dead ends: 45 [2024-09-11 20:07:48,387 INFO L226 Difference]: Without dead ends: 43 [2024-09-11 20:07:48,387 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 20:07:48,388 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:07:48,389 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 116 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:07:48,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-11 20:07:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2024-09-11 20:07:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-11 20:07:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2024-09-11 20:07:48,401 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 28 [2024-09-11 20:07:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:07:48,402 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2024-09-11 20:07:48,402 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, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 20:07:48,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:48,403 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2024-09-11 20:07:48,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-11 20:07:48,404 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:07:48,404 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:07:48,404 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-11 20:07:48,404 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:07:48,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:48,405 INFO L85 PathProgramCache]: Analyzing trace with hash 831418820, now seen corresponding path program 1 times [2024-09-11 20:07:48,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:07:48,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953697967] [2024-09-11 20:07:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:48,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:07:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:07:48,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080148002] [2024-09-11 20:07:48,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:48,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:07:48,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:07:48,434 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) [2024-09-11 20:07:48,436 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 20:07:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:48,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 20:07:48,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:07:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-11 20:07:48,639 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:07:48,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:07:48,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953697967] [2024-09-11 20:07:48,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:07:48,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080148002] [2024-09-11 20:07:48,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080148002] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:07:48,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:07:48,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 20:07:48,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346009343] [2024-09-11 20:07:48,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:07:48,642 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 20:07:48,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:07:48,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 20:07:48,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 20:07:48,643 INFO L87 Difference]: Start difference. First operand 36 states and 44 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, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 20:07:48,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:07:48,736 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2024-09-11 20:07:48,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 20:07:48,737 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, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-09-11 20:07:48,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:07:48,739 INFO L225 Difference]: With dead ends: 62 [2024-09-11 20:07:48,740 INFO L226 Difference]: Without dead ends: 49 [2024-09-11 20:07:48,741 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 20:07:48,742 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 117 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 [2024-09-11 20:07:48,744 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 117 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:07:48,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-11 20:07:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-11 20:07:48,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-11 20:07:48,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2024-09-11 20:07:48,773 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 33 [2024-09-11 20:07:48,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:07:48,773 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2024-09-11 20:07:48,774 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, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 20:07:48,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:48,774 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2024-09-11 20:07:48,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-11 20:07:48,775 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:07:48,775 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:07:48,793 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-11 20:07:48,979 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 [2024-09-11 20:07:48,980 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:07:48,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:48,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1016562388, now seen corresponding path program 1 times [2024-09-11 20:07:48,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:07:48,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655968537] [2024-09-11 20:07:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:48,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:07:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:07:49,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459535229] [2024-09-11 20:07:49,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:49,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:07:49,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:07:49,009 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) [2024-09-11 20:07:49,016 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 20:07:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:49,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-11 20:07:49,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:07:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-11 20:07:49,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:07:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-11 20:07:49,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:07:49,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655968537] [2024-09-11 20:07:49,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:07:49,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459535229] [2024-09-11 20:07:49,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459535229] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:07:49,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:07:49,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-11 20:07:49,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891211040] [2024-09-11 20:07:49,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:07:49,425 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-11 20:07:49,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:07:49,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-11 20:07:49,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-11 20:07:49,426 INFO L87 Difference]: Start difference. First operand 49 states and 62 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, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-11 20:07:49,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:07:49,577 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2024-09-11 20:07:49,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:07:49,578 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, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 40 [2024-09-11 20:07:49,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:07:49,584 INFO L225 Difference]: With dead ends: 64 [2024-09-11 20:07:49,584 INFO L226 Difference]: Without dead ends: 62 [2024-09-11 20:07:49,585 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-11 20:07:49,586 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:07:49,586 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 121 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:07:49,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-11 20:07:49,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2024-09-11 20:07:49,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 36 states have internal predecessors, (41), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-11 20:07:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2024-09-11 20:07:49,611 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 40 [2024-09-11 20:07:49,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:07:49,611 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2024-09-11 20:07:49,612 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, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-11 20:07:49,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:49,613 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2024-09-11 20:07:49,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-11 20:07:49,615 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:07:49,615 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:07:49,631 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-11 20:07:49,815 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 [2024-09-11 20:07:49,816 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:07:49,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:49,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1147651331, now seen corresponding path program 1 times [2024-09-11 20:07:49,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:07:49,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799131927] [2024-09-11 20:07:49,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:49,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:07:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:07:49,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780440826] [2024-09-11 20:07:49,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:49,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:07:49,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:07:49,835 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) [2024-09-11 20:07:49,837 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 20:07:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:49,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-11 20:07:49,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:07:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-11 20:07:50,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:07:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-11 20:07:50,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:07:50,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799131927] [2024-09-11 20:07:50,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:07:50,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780440826] [2024-09-11 20:07:50,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780440826] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-11 20:07:50,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:07:50,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-11 20:07:50,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962108204] [2024-09-11 20:07:50,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:07:50,196 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 20:07:50,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:07:50,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 20:07:50,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-11 20:07:50,196 INFO L87 Difference]: Start difference. First operand 59 states and 76 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, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 20:07:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:07:50,269 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2024-09-11 20:07:50,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 20:07:50,271 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, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 50 [2024-09-11 20:07:50,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:07:50,272 INFO L225 Difference]: With dead ends: 69 [2024-09-11 20:07:50,272 INFO L226 Difference]: Without dead ends: 67 [2024-09-11 20:07:50,272 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-11 20:07:50,273 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 110 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 [2024-09-11 20:07:50,273 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 110 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:07:50,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-11 20:07:50,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-09-11 20:07:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-11 20:07:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2024-09-11 20:07:50,305 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 50 [2024-09-11 20:07:50,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:07:50,305 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2024-09-11 20:07:50,305 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, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 20:07:50,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:50,309 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2024-09-11 20:07:50,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-11 20:07:50,309 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:07:50,310 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 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, 1, 1, 1, 1, 1] [2024-09-11 20:07:50,325 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-11 20:07:50,510 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 [2024-09-11 20:07:50,510 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:07:50,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:50,511 INFO L85 PathProgramCache]: Analyzing trace with hash 73871321, now seen corresponding path program 1 times [2024-09-11 20:07:50,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:07:50,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975151493] [2024-09-11 20:07:50,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:50,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:07:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:50,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:07:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:50,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:07:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:50,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 20:07:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:50,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:07:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:50,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-11 20:07:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:50,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-11 20:07:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:50,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-11 20:07:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:50,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-11 20:07:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:50,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-11 20:07:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-11 20:07:50,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:07:50,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975151493] [2024-09-11 20:07:50,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975151493] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:07:50,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:07:50,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 20:07:50,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305166918] [2024-09-11 20:07:50,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:07:50,694 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 20:07:50,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:07:50,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 20:07:50,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 20:07:50,695 INFO L87 Difference]: Start difference. First operand 66 states and 84 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, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-11 20:07:50,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:07:50,808 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2024-09-11 20:07:50,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 20:07:50,808 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, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2024-09-11 20:07:50,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:07:50,810 INFO L225 Difference]: With dead ends: 74 [2024-09-11 20:07:50,810 INFO L226 Difference]: Without dead ends: 62 [2024-09-11 20:07:50,810 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-11 20:07:50,811 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:07:50,811 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 127 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:07:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-11 20:07:50,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-09-11 20:07:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 39 states have internal predecessors, (42), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-11 20:07:50,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2024-09-11 20:07:50,833 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 56 [2024-09-11 20:07:50,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:07:50,835 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2024-09-11 20:07:50,836 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, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-11 20:07:50,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:50,836 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2024-09-11 20:07:50,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-11 20:07:50,839 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:07:50,839 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 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] [2024-09-11 20:07:50,839 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-11 20:07:50,839 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:07:50,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:50,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1282123871, now seen corresponding path program 1 times [2024-09-11 20:07:50,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:07:50,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555631250] [2024-09-11 20:07:50,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:50,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:07:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:07:50,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792641959] [2024-09-11 20:07:50,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:50,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:07:50,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:07:50,875 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) [2024-09-11 20:07:50,876 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 20:07:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:50,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-11 20:07:50,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:07:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-09-11 20:07:51,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:07:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-09-11 20:07:53,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:07:53,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555631250] [2024-09-11 20:07:53,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:07:53,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792641959] [2024-09-11 20:07:53,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792641959] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:07:53,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:07:53,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-09-11 20:07:53,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490618676] [2024-09-11 20:07:53,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:07:53,211 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-11 20:07:53,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:07:53,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-11 20:07:53,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-09-11 20:07:53,212 INFO L87 Difference]: Start difference. First operand 62 states and 77 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, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-11 20:07:54,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:07:54,699 INFO L93 Difference]: Finished difference Result 149 states and 206 transitions. [2024-09-11 20:07:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-11 20:07:54,700 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, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 70 [2024-09-11 20:07:54,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:07:54,702 INFO L225 Difference]: With dead ends: 149 [2024-09-11 20:07:54,702 INFO L226 Difference]: Without dead ends: 126 [2024-09-11 20:07:54,703 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2024-09-11 20:07:54,704 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 62 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-11 20:07:54,704 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 311 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-11 20:07:54,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-09-11 20:07:54,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2024-09-11 20:07:54,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 64 states have internal predecessors, (71), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-11 20:07:54,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2024-09-11 20:07:54,741 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 70 [2024-09-11 20:07:54,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:07:54,741 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2024-09-11 20:07:54,741 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, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-09-11 20:07:54,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:54,742 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2024-09-11 20:07:54,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-11 20:07:54,743 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:07:54,743 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 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, 1, 1] [2024-09-11 20:07:54,759 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-11 20:07:54,943 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 [2024-09-11 20:07:54,944 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:07:54,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:54,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1411586487, now seen corresponding path program 1 times [2024-09-11 20:07:54,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:07:54,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265652908] [2024-09-11 20:07:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:54,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:07:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:07:54,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798079228] [2024-09-11 20:07:54,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:54,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:07:54,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:07:54,975 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) [2024-09-11 20:07:54,977 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 20:07:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:55,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-11 20:07:55,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:07:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-09-11 20:07:55,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:07:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-11 20:07:56,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:07:56,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265652908] [2024-09-11 20:07:56,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:07:56,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798079228] [2024-09-11 20:07:56,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798079228] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:07:56,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:07:56,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-09-11 20:07:56,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305351179] [2024-09-11 20:07:56,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:07:56,291 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-11 20:07:56,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:07:56,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-11 20:07:56,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-09-11 20:07:56,292 INFO L87 Difference]: Start difference. First operand 101 states and 128 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, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2024-09-11 20:07:56,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:07:56,836 INFO L93 Difference]: Finished difference Result 141 states and 176 transitions. [2024-09-11 20:07:56,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 20:07:56,837 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, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) Word has length 81 [2024-09-11 20:07:56,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:07:56,839 INFO L225 Difference]: With dead ends: 141 [2024-09-11 20:07:56,839 INFO L226 Difference]: Without dead ends: 107 [2024-09-11 20:07:56,840 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2024-09-11 20:07:56,840 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:07:56,840 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 347 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:07:56,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-11 20:07:56,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2024-09-11 20:07:56,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 58 states have internal predecessors, (65), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-11 20:07:56,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2024-09-11 20:07:56,874 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 81 [2024-09-11 20:07:56,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:07:56,875 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2024-09-11 20:07:56,875 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, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2024-09-11 20:07:56,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:56,875 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2024-09-11 20:07:56,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-11 20:07:56,876 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:07:56,879 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 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] [2024-09-11 20:07:56,896 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-11 20:07:57,083 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 [2024-09-11 20:07:57,084 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:07:57,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:57,084 INFO L85 PathProgramCache]: Analyzing trace with hash -302279341, now seen corresponding path program 2 times [2024-09-11 20:07:57,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:07:57,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741119028] [2024-09-11 20:07:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:57,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:07:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:07:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:07:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 20:07:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:07:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-11 20:07:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-11 20:07:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-11 20:07:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-11 20:07:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-11 20:07:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-11 20:07:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-11 20:07:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-11 20:07:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-11 20:07:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-11 20:07:57,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:07:57,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741119028] [2024-09-11 20:07:57,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741119028] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:07:57,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892351410] [2024-09-11 20:07:57,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:07:57,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:07:57,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:07:57,288 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) [2024-09-11 20:07:57,303 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 20:07:57,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:07:57,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:07:57,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-11 20:07:57,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:07:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-11 20:07:57,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:07:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-11 20:07:57,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892351410] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:07:57,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:07:57,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-09-11 20:07:57,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756875769] [2024-09-11 20:07:57,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:07:57,463 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 20:07:57,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:07:57,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 20:07:57,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-11 20:07:57,464 INFO L87 Difference]: Start difference. First operand 93 states and 114 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, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-09-11 20:07:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:07:57,528 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2024-09-11 20:07:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-11 20:07:57,529 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, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 83 [2024-09-11 20:07:57,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:07:57,530 INFO L225 Difference]: With dead ends: 120 [2024-09-11 20:07:57,530 INFO L226 Difference]: Without dead ends: 98 [2024-09-11 20:07:57,531 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-11 20:07:57,532 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:07:57,532 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 143 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:07:57,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-11 20:07:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2024-09-11 20:07:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 59 states have (on average 1.152542372881356) internal successors, (68), 61 states have internal predecessors, (68), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-11 20:07:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2024-09-11 20:07:57,564 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 83 [2024-09-11 20:07:57,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:07:57,564 INFO L474 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2024-09-11 20:07:57,564 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, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-09-11 20:07:57,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:57,565 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2024-09-11 20:07:57,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-11 20:07:57,566 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:07:57,566 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 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, 1, 1, 1, 1] [2024-09-11 20:07:57,582 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-11 20:07:57,766 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 [2024-09-11 20:07:57,767 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:07:57,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:57,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1047816948, now seen corresponding path program 1 times [2024-09-11 20:07:57,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:07:57,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091147889] [2024-09-11 20:07:57,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:57,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:07:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:07:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:07:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 20:07:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:07:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:57,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-11 20:07:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:58,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-11 20:07:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:58,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-11 20:07:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:58,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-11 20:07:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:58,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-11 20:07:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:58,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-11 20:07:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:58,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-11 20:07:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:58,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-11 20:07:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:58,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-11 20:07:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:58,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-11 20:07:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-11 20:07:58,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:07:58,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091147889] [2024-09-11 20:07:58,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091147889] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:07:58,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302012750] [2024-09-11 20:07:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:58,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:07:58,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:07:58,039 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) [2024-09-11 20:07:58,041 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 20:07:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:58,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-11 20:07:58,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:07:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-11 20:07:58,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:07:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-11 20:07:58,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302012750] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:07:58,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:07:58,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 18 [2024-09-11 20:07:58,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481390930] [2024-09-11 20:07:58,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:07:58,756 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 20:07:58,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:07:58,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 20:07:58,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-09-11 20:07:58,757 INFO L87 Difference]: Start difference. First operand 98 states and 121 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, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-11 20:07:59,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:07:59,090 INFO L93 Difference]: Finished difference Result 113 states and 141 transitions. [2024-09-11 20:07:59,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-11 20:07:59,090 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, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 86 [2024-09-11 20:07:59,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:07:59,092 INFO L225 Difference]: With dead ends: 113 [2024-09-11 20:07:59,092 INFO L226 Difference]: Without dead ends: 96 [2024-09-11 20:07:59,092 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-09-11 20:07:59,093 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 24 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:07:59,093 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 373 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 20:07:59,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-11 20:07:59,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2024-09-11 20:07:59,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 56 states have internal predecessors, (62), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-11 20:07:59,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2024-09-11 20:07:59,121 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 86 [2024-09-11 20:07:59,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:07:59,121 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2024-09-11 20:07:59,121 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, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-11 20:07:59,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:59,122 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2024-09-11 20:07:59,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-11 20:07:59,123 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:07:59,123 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 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, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:07:59,139 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-11 20:07:59,323 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 [2024-09-11 20:07:59,324 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:07:59,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:59,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1271237959, now seen corresponding path program 1 times [2024-09-11 20:07:59,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:07:59,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612643505] [2024-09-11 20:07:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:59,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:07:59,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:59,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:07:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:59,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:07:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:59,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 20:07:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:59,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:07:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:59,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-11 20:07:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:59,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-11 20:07:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:59,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-11 20:07:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:59,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-11 20:07:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:59,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-11 20:07:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:59,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-11 20:07:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:59,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-11 20:07:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:59,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-11 20:07:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:59,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-11 20:07:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:59,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-11 20:07:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:59,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-11 20:07:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-11 20:07:59,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:07:59,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612643505] [2024-09-11 20:07:59,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612643505] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:07:59,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131910681] [2024-09-11 20:07:59,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:59,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:07:59,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:07:59,429 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) [2024-09-11 20:07:59,431 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-11 20:07:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:07:59,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-11 20:07:59,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:07:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2024-09-11 20:07:59,515 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:07:59,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131910681] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:07:59,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:07:59,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-09-11 20:07:59,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880051042] [2024-09-11 20:07:59,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:07:59,515 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 20:07:59,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:07:59,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 20:07:59,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-11 20:07:59,516 INFO L87 Difference]: Start difference. First operand 89 states and 107 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, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-11 20:07:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:07:59,580 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2024-09-11 20:07:59,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 20:07:59,580 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, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 90 [2024-09-11 20:07:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:07:59,581 INFO L225 Difference]: With dead ends: 96 [2024-09-11 20:07:59,581 INFO L226 Difference]: Without dead ends: 84 [2024-09-11 20:07:59,582 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-11 20:07:59,583 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:07:59,583 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 112 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:07:59,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-11 20:07:59,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-09-11 20:07:59,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 52 states have internal predecessors, (57), 22 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-11 20:07:59,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2024-09-11 20:07:59,610 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 90 [2024-09-11 20:07:59,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:07:59,611 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2024-09-11 20:07:59,611 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, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-11 20:07:59,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:59,611 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2024-09-11 20:07:59,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-09-11 20:07:59,612 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:07:59,612 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 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] [2024-09-11 20:07:59,629 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-11 20:07:59,813 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 [2024-09-11 20:07:59,813 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:07:59,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:07:59,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1209712204, now seen corresponding path program 3 times [2024-09-11 20:07:59,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:07:59,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508243429] [2024-09-11 20:07:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:07:59,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:07:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:07:59,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833220528] [2024-09-11 20:07:59,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:07:59,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:07:59,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:07:59,848 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) [2024-09-11 20:07:59,850 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-11 20:07:59,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 20:07:59,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:07:59,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-11 20:07:59,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:08:00,427 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2024-09-11 20:08:00,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:08:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-09-11 20:08:12,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:08:12,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508243429] [2024-09-11 20:08:12,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:08:12,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833220528] [2024-09-11 20:08:12,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833220528] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:08:12,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:08:12,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-11 20:08:12,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628888161] [2024-09-11 20:08:12,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:08:12,485 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 20:08:12,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:08:12,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 20:08:12,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-09-11 20:08:12,486 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 10 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-11 20:08:17,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:08:17,566 INFO L93 Difference]: Finished difference Result 164 states and 217 transitions. [2024-09-11 20:08:17,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-11 20:08:17,566 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 10 states have call predecessors, (30), 9 states have call successors, (30) Word has length 100 [2024-09-11 20:08:17,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:08:17,567 INFO L225 Difference]: With dead ends: 164 [2024-09-11 20:08:17,568 INFO L226 Difference]: Without dead ends: 142 [2024-09-11 20:08:17,568 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2024-09-11 20:08:17,569 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 74 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:08:17,569 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 414 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-11 20:08:17,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-11 20:08:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 127. [2024-09-11 20:08:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 76 states have (on average 1.144736842105263) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 13 states have call predecessors, (37), 13 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2024-09-11 20:08:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 160 transitions. [2024-09-11 20:08:17,614 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 160 transitions. Word has length 100 [2024-09-11 20:08:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:08:17,614 INFO L474 AbstractCegarLoop]: Abstraction has 127 states and 160 transitions. [2024-09-11 20:08:17,614 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 18 states have internal predecessors, (44), 11 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 10 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-11 20:08:17,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:08:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 160 transitions. [2024-09-11 20:08:17,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-09-11 20:08:17,617 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:08:17,617 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 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] [2024-09-11 20:08:17,630 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-11 20:08:17,817 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 [2024-09-11 20:08:17,817 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:08:17,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:08:17,818 INFO L85 PathProgramCache]: Analyzing trace with hash 924515754, now seen corresponding path program 2 times [2024-09-11 20:08:17,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:08:17,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859273211] [2024-09-11 20:08:17,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:08:17,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:08:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:08:17,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31609954] [2024-09-11 20:08:17,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:08:17,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:08:17,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:08:17,871 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) [2024-09-11 20:08:17,872 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-11 20:08:17,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:08:17,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:08:17,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-11 20:08:17,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:08:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 124 proven. 22 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2024-09-11 20:08:18,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:08:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-11 20:08:18,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:08:18,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859273211] [2024-09-11 20:08:18,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:08:18,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31609954] [2024-09-11 20:08:18,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31609954] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:08:18,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:08:18,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2024-09-11 20:08:18,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100972791] [2024-09-11 20:08:18,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:08:18,308 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-11 20:08:18,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:08:18,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-11 20:08:18,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-09-11 20:08:18,309 INFO L87 Difference]: Start difference. First operand 127 states and 160 transitions. Second operand has 14 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-11 20:08:18,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:08:18,893 INFO L93 Difference]: Finished difference Result 143 states and 174 transitions. [2024-09-11 20:08:18,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 20:08:18,894 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 111 [2024-09-11 20:08:18,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:08:18,895 INFO L225 Difference]: With dead ends: 143 [2024-09-11 20:08:18,895 INFO L226 Difference]: Without dead ends: 141 [2024-09-11 20:08:18,895 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-09-11 20:08:18,896 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:08:18,896 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 135 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:08:18,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-09-11 20:08:18,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2024-09-11 20:08:18,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 86 states have (on average 1.127906976744186) internal successors, (97), 90 states have internal predecessors, (97), 38 states have call successors, (38), 16 states have call predecessors, (38), 16 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-11 20:08:18,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 172 transitions. [2024-09-11 20:08:18,952 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 172 transitions. Word has length 111 [2024-09-11 20:08:18,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:08:18,952 INFO L474 AbstractCegarLoop]: Abstraction has 141 states and 172 transitions. [2024-09-11 20:08:18,953 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-11 20:08:18,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:08:18,953 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 172 transitions. [2024-09-11 20:08:18,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-09-11 20:08:18,954 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:08:18,954 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 3, 3, 3, 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] [2024-09-11 20:08:18,971 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-11 20:08:19,158 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 [2024-09-11 20:08:19,159 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:08:19,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:08:19,159 INFO L85 PathProgramCache]: Analyzing trace with hash -225818490, now seen corresponding path program 4 times [2024-09-11 20:08:19,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:08:19,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921045788] [2024-09-11 20:08:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:08:19,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:08:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,396 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:08:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:08:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,399 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 20:08:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:08:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,406 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-11 20:08:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-11 20:08:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-11 20:08:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-11 20:08:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-11 20:08:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-11 20:08:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-11 20:08:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-11 20:08:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-11 20:08:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-11 20:08:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-11 20:08:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-11 20:08:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-11 20:08:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-11 20:08:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-11 20:08:19,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:08:19,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921045788] [2024-09-11 20:08:19,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921045788] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:08:19,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400973256] [2024-09-11 20:08:19,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 20:08:19,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:08:19,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:08:19,459 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) [2024-09-11 20:08:19,461 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-11 20:08:19,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 20:08:19,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:08:19,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-11 20:08:19,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:08:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-11 20:08:19,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:08:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 43 proven. 23 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-11 20:08:19,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400973256] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:08:19,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:08:19,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-09-11 20:08:19,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404975341] [2024-09-11 20:08:19,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:08:19,842 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-11 20:08:19,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:08:19,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-11 20:08:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-11 20:08:19,843 INFO L87 Difference]: Start difference. First operand 141 states and 172 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, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2024-09-11 20:08:19,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:08:19,975 INFO L93 Difference]: Finished difference Result 173 states and 214 transitions. [2024-09-11 20:08:19,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 20:08:19,976 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, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) Word has length 113 [2024-09-11 20:08:19,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:08:19,977 INFO L225 Difference]: With dead ends: 173 [2024-09-11 20:08:19,977 INFO L226 Difference]: Without dead ends: 145 [2024-09-11 20:08:19,979 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-11 20:08:19,980 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 2 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:08:19,980 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 176 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:08:19,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-11 20:08:20,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2024-09-11 20:08:20,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 92 states have internal predecessors, (98), 39 states have call successors, (39), 16 states have call predecessors, (39), 16 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2024-09-11 20:08:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 175 transitions. [2024-09-11 20:08:20,049 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 175 transitions. Word has length 113 [2024-09-11 20:08:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:08:20,050 INFO L474 AbstractCegarLoop]: Abstraction has 143 states and 175 transitions. [2024-09-11 20:08:20,050 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, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2024-09-11 20:08:20,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:08:20,050 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 175 transitions. [2024-09-11 20:08:20,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-09-11 20:08:20,052 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:08:20,052 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 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] [2024-09-11 20:08:20,068 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-11 20:08:20,256 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 [2024-09-11 20:08:20,257 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:08:20,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:08:20,258 INFO L85 PathProgramCache]: Analyzing trace with hash 464728313, now seen corresponding path program 2 times [2024-09-11 20:08:20,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:08:20,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997639867] [2024-09-11 20:08:20,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:08:20,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:08:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:08:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:08:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-11 20:08:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:08:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-11 20:08:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-11 20:08:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-11 20:08:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-11 20:08:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-11 20:08:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-11 20:08:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-11 20:08:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-11 20:08:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-11 20:08:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-11 20:08:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-11 20:08:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-11 20:08:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-11 20:08:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-11 20:08:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-09-11 20:08:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:08:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-09-11 20:08:20,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:08:20,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997639867] [2024-09-11 20:08:20,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997639867] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:08:20,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788535143] [2024-09-11 20:08:20,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:08:20,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:08:20,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:08:20,672 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) [2024-09-11 20:08:20,678 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-11 20:08:20,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:08:20,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:08:20,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-11 20:08:20,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:08:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-11 20:08:21,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:08:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-11 20:08:22,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788535143] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:08:22,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:08:22,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 30 [2024-09-11 20:08:22,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679522645] [2024-09-11 20:08:22,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:08:22,190 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-11 20:08:22,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:08:22,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-11 20:08:22,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-09-11 20:08:22,191 INFO L87 Difference]: Start difference. First operand 143 states and 175 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 27 states have internal predecessors, (61), 19 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 19 states have call predecessors, (48), 19 states have call successors, (48) [2024-09-11 20:08:22,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:08:22,864 INFO L93 Difference]: Finished difference Result 160 states and 198 transitions. [2024-09-11 20:08:22,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-11 20:08:22,865 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 27 states have internal predecessors, (61), 19 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 19 states have call predecessors, (48), 19 states have call successors, (48) Word has length 116 [2024-09-11 20:08:22,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:08:22,866 INFO L225 Difference]: With dead ends: 160 [2024-09-11 20:08:22,867 INFO L226 Difference]: Without dead ends: 132 [2024-09-11 20:08:22,867 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2024-09-11 20:08:22,868 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 18 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 20:08:22,868 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 399 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 20:08:22,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-09-11 20:08:22,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2024-09-11 20:08:22,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 82 states have internal predecessors, (87), 32 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-11 20:08:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2024-09-11 20:08:22,913 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 116 [2024-09-11 20:08:22,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:08:22,914 INFO L474 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2024-09-11 20:08:22,914 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 27 states have internal predecessors, (61), 19 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 19 states have call predecessors, (48), 19 states have call successors, (48) [2024-09-11 20:08:22,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:08:22,914 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2024-09-11 20:08:22,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-09-11 20:08:22,915 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:08:22,916 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:08:22,932 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-11 20:08:23,119 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 [2024-09-11 20:08:23,120 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:08:23,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:08:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1038207041, now seen corresponding path program 5 times [2024-09-11 20:08:23,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:08:23,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158148600] [2024-09-11 20:08:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:08:23,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:08:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:08:23,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416085189] [2024-09-11 20:08:23,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 20:08:23,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:08:23,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:08:23,171 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) [2024-09-11 20:08:23,173 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-11 20:08:23,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-11 20:08:23,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:08:23,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-11 20:08:23,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:08:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 90 proven. 132 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2024-09-11 20:08:23,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:08:40,201 WARN L293 SmtUtils]: Spent 5.56s on a formula simplification. DAG size of input: 119 DAG size of output: 114 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 20:11:40,692 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-09-11 20:11:42,791 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts.