./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 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/egcd3-ll_valuebound2.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 bda512f5ab4e84c08e80fd02a1c07c8fba5ca60aa45d55edfde2cc268dd1288e --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 16:08:00,032 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 16:08:00,123 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 16:08:00,128 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 16:08:00,130 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 16:08:00,154 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 16:08:00,155 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 16:08:00,156 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 16:08:00,157 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 16:08:00,160 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 16:08:00,160 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 16:08:00,161 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 16:08:00,161 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 16:08:00,161 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 16:08:00,162 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 16:08:00,162 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 16:08:00,162 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 16:08:00,163 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 16:08:00,163 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 16:08:00,163 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 16:08:00,163 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 16:08:00,164 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 16:08:00,165 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 16:08:00,165 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 16:08:00,165 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 16:08:00,165 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 16:08:00,166 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 16:08:00,166 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 16:08:00,166 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 16:08:00,166 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 16:08:00,167 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 16:08:00,167 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 16:08:00,167 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:08:00,168 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 16:08:00,168 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 16:08:00,168 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 16:08:00,169 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 16:08:00,169 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 16:08:00,169 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 16:08:00,169 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 16:08:00,170 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 16:08:00,170 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 16:08:00,170 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bda512f5ab4e84c08e80fd02a1c07c8fba5ca60aa45d55edfde2cc268dd1288e Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 16:08:00,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 16:08:00,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 16:08:00,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 16:08:00,431 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 16:08:00,432 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 16:08:00,433 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c [2024-09-18 16:08:01,824 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 16:08:01,984 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 16:08:01,984 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c [2024-09-18 16:08:01,991 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/1ee6d96d0/cbe47b53a107440ba9e1db608108ffc7/FLAG0c03662dd [2024-09-18 16:08:02,001 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/1ee6d96d0/cbe47b53a107440ba9e1db608108ffc7 [2024-09-18 16:08:02,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 16:08:02,004 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 16:08:02,005 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 16:08:02,005 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 16:08:02,012 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 16:08:02,012 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:08:02" (1/1) ... [2024-09-18 16:08:02,013 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62935e1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:08:02, skipping insertion in model container [2024-09-18 16:08:02,013 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:08:02" (1/1) ... [2024-09-18 16:08:02,032 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 16:08:02,166 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2024-09-18 16:08:02,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:08:02,193 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 16:08:02,208 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2024-09-18 16:08:02,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:08:02,247 INFO L204 MainTranslator]: Completed translation [2024-09-18 16:08:02,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:08:02 WrapperNode [2024-09-18 16:08:02,248 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 16:08:02,249 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 16:08:02,249 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 16:08:02,249 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 16:08:02,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:08:02" (1/1) ... [2024-09-18 16:08:02,264 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:08:02" (1/1) ... [2024-09-18 16:08:02,270 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 16:08:02,270 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 16:08:02,271 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 16:08:02,271 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 16:08:02,271 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 16:08:02,281 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:08:02" (1/1) ... [2024-09-18 16:08:02,281 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:08:02" (1/1) ... [2024-09-18 16:08:02,287 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:08:02" (1/1) ... [2024-09-18 16:08:02,306 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]. [2024-09-18 16:08:02,306 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:08:02" (1/1) ... [2024-09-18 16:08:02,306 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:08:02" (1/1) ... [2024-09-18 16:08:02,309 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:08:02" (1/1) ... [2024-09-18 16:08:02,316 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:08:02" (1/1) ... [2024-09-18 16:08:02,317 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:08:02" (1/1) ... [2024-09-18 16:08:02,318 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:08:02" (1/1) ... [2024-09-18 16:08:02,320 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 16:08:02,321 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 16:08:02,321 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 16:08:02,321 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 16:08:02,322 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:08:02" (1/1) ... [2024-09-18 16:08:02,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:08:02,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:02,359 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-18 16:08:02,361 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 [2024-09-18 16:08:02,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 16:08:02,398 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 16:08:02,399 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 16:08:02,399 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 16:08:02,399 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 16:08:02,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 16:08:02,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 16:08:02,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 16:08:02,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 16:08:02,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 16:08:02,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 16:08:02,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 16:08:02,467 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 16:08:02,469 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 16:08:02,650 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-18 16:08:02,650 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 16:08:02,674 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 16:08:02,676 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-18 16:08:02,677 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:08:02 BoogieIcfgContainer [2024-09-18 16:08:02,678 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 16:08:02,680 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 16:08:02,682 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 16:08:02,685 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 16:08:02,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 04:08:02" (1/3) ... [2024-09-18 16:08:02,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@95e142f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:08:02, skipping insertion in model container [2024-09-18 16:08:02,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:08:02" (2/3) ... [2024-09-18 16:08:02,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@95e142f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:08:02, skipping insertion in model container [2024-09-18 16:08:02,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:08:02" (3/3) ... [2024-09-18 16:08:02,688 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound2.c [2024-09-18 16:08:02,706 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 16:08:02,707 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 16:08:02,758 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 16:08:02,764 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;@3b14159b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 16:08:02,764 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 16:08:02,768 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-18 16:08:02,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-18 16:08:02,778 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:02,779 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:02,779 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:02,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:02,786 INFO L85 PathProgramCache]: Analyzing trace with hash -681232038, now seen corresponding path program 1 times [2024-09-18 16:08:02,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:02,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972502066] [2024-09-18 16:08:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:02,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:02,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:08:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:02,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:08:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:02,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:08:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:02,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:08:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:02,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:08:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 16:08:02,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:02,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972502066] [2024-09-18 16:08:02,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972502066] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:08:02,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:08:02,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 16:08:02,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063406394] [2024-09-18 16:08:02,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:08:03,003 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 16:08:03,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 16:08:03,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 16:08:03,028 INFO L87 Difference]: Start difference. First operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 16:08:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:03,059 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2024-09-18 16:08:03,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 16:08:03,061 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-18 16:08:03,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:03,067 INFO L225 Difference]: With dead ends: 70 [2024-09-18 16:08:03,067 INFO L226 Difference]: Without dead ends: 34 [2024-09-18 16:08:03,070 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 16:08:03,073 INFO L434 NwaCegarLoop]: 45 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, 45 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 [2024-09-18 16:08:03,073 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:08:03,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-18 16:08:03,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-18 16:08:03,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-18 16:08:03,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-18 16:08:03,105 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 32 [2024-09-18 16:08:03,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:03,105 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-18 16:08:03,105 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 16:08:03,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-18 16:08:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-18 16:08:03,108 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:03,108 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:03,108 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 16:08:03,108 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:03,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:03,109 INFO L85 PathProgramCache]: Analyzing trace with hash -2087558939, now seen corresponding path program 1 times [2024-09-18 16:08:03,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:03,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666426467] [2024-09-18 16:08:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:03,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:03,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:08:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:03,329 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:08:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:03,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:08:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:03,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:08:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:03,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:08:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 16:08:03,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:03,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666426467] [2024-09-18 16:08:03,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666426467] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:08:03,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:08:03,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-18 16:08:03,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936318297] [2024-09-18 16:08:03,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:08:03,413 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 16:08:03,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:03,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 16:08:03,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:08:03,417 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-18 16:08:03,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:03,528 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-09-18 16:08:03,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 16:08:03,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-09-18 16:08:03,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:03,530 INFO L225 Difference]: With dead ends: 53 [2024-09-18 16:08:03,530 INFO L226 Difference]: Without dead ends: 46 [2024-09-18 16:08:03,530 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:08:03,532 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:03,532 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 129 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:08:03,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-18 16:08:03,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2024-09-18 16:08:03,543 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), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-18 16:08:03,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-18 16:08:03,544 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 33 [2024-09-18 16:08:03,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:03,545 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-18 16:08:03,545 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-18 16:08:03,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:03,546 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-18 16:08:03,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-18 16:08:03,548 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:03,548 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:03,549 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 16:08:03,549 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:03,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:03,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2066421882, now seen corresponding path program 1 times [2024-09-18 16:08:03,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:03,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072417678] [2024-09-18 16:08:03,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:03,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:08:03,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550774282] [2024-09-18 16:08:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:03,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:03,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:03,592 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) [2024-09-18 16:08:03,594 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 16:08:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:03,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-18 16:08:03,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:08:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 16:08:03,796 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:08:03,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:03,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072417678] [2024-09-18 16:08:03,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:08:03,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550774282] [2024-09-18 16:08:03,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550774282] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:08:03,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:08:03,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:08:03,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592308634] [2024-09-18 16:08:03,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:08:03,800 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:08:03,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:03,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:08:03,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:08:03,802 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-18 16:08:03,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:03,867 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2024-09-18 16:08:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:08:03,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2024-09-18 16:08:03,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:03,871 INFO L225 Difference]: With dead ends: 52 [2024-09-18 16:08:03,871 INFO L226 Difference]: Without dead ends: 50 [2024-09-18 16:08:03,872 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:08:03,873 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:03,875 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 142 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:08:03,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-18 16:08:03,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-09-18 16:08:03,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-18 16:08:03,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-09-18 16:08:03,892 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 36 [2024-09-18 16:08:03,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:03,893 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-09-18 16:08:03,893 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-18 16:08:03,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:03,894 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-09-18 16:08:03,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-18 16:08:03,896 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:03,896 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:03,914 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 16:08:04,097 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:04,097 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:04,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:04,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1918028984, now seen corresponding path program 1 times [2024-09-18 16:08:04,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:04,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891911473] [2024-09-18 16:08:04,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:04,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:04,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:08:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:04,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:08:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:04,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:08:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:04,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:08:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:04,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:08:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 16:08:04,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:04,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891911473] [2024-09-18 16:08:04,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891911473] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:08:04,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061937344] [2024-09-18 16:08:04,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:04,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:04,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:04,245 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) [2024-09-18 16:08:04,247 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 16:08:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:04,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-18 16:08:04,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:08:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 16:08:04,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:08:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 16:08:04,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061937344] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:08:04,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:08:04,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-18 16:08:04,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96889267] [2024-09-18 16:08:04,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:08:04,412 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 16:08:04,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:04,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 16:08:04,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-18 16:08:04,415 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 16:08:04,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:04,619 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-09-18 16:08:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 16:08:04,623 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-09-18 16:08:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:04,625 INFO L225 Difference]: With dead ends: 102 [2024-09-18 16:08:04,626 INFO L226 Difference]: Without dead ends: 95 [2024-09-18 16:08:04,628 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-18 16:08:04,629 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 60 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:04,629 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:08:04,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-18 16:08:04,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2024-09-18 16:08:04,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-18 16:08:04,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2024-09-18 16:08:04,654 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 38 [2024-09-18 16:08:04,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:04,654 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2024-09-18 16:08:04,655 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 16:08:04,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:04,658 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2024-09-18 16:08:04,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-18 16:08:04,659 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:04,660 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 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] [2024-09-18 16:08:04,675 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-18 16:08:04,860 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:04,861 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:04,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:04,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1557854921, now seen corresponding path program 1 times [2024-09-18 16:08:04,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:04,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337791149] [2024-09-18 16:08:04,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:04,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:08:04,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254714223] [2024-09-18 16:08:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:04,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:04,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:04,877 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) [2024-09-18 16:08:04,878 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 16:08:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:04,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-18 16:08:04,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:08:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 16:08:05,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:08:05,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:05,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337791149] [2024-09-18 16:08:05,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:08:05,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254714223] [2024-09-18 16:08:05,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254714223] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:08:05,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:08:05,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:08:05,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360411629] [2024-09-18 16:08:05,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:08:05,100 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:08:05,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:05,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:08:05,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:08:05,105 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-18 16:08:05,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:05,181 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-09-18 16:08:05,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:08:05,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2024-09-18 16:08:05,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:05,186 INFO L225 Difference]: With dead ends: 78 [2024-09-18 16:08:05,186 INFO L226 Difference]: Without dead ends: 76 [2024-09-18 16:08:05,186 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:08:05,187 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:05,188 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:08:05,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-18 16:08:05,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-09-18 16:08:05,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-18 16:08:05,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2024-09-18 16:08:05,214 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 41 [2024-09-18 16:08:05,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:05,216 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2024-09-18 16:08:05,216 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-18 16:08:05,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:05,217 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2024-09-18 16:08:05,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-18 16:08:05,218 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:05,218 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:05,234 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 16:08:05,418 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:05,419 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:05,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:05,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1651771191, now seen corresponding path program 1 times [2024-09-18 16:08:05,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:05,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685641026] [2024-09-18 16:08:05,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:05,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:08:05,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483690990] [2024-09-18 16:08:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:05,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:05,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:05,436 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) [2024-09-18 16:08:05,439 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 16:08:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:05,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-18 16:08:05,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:08:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 16:08:05,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:08:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 16:08:06,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:06,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685641026] [2024-09-18 16:08:06,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:08:06,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483690990] [2024-09-18 16:08:06,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483690990] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:08:06,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:08:06,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2024-09-18 16:08:06,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554069899] [2024-09-18 16:08:06,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:08:06,104 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-18 16:08:06,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:06,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-18 16:08:06,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-18 16:08:06,106 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-18 16:08:07,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:07,736 INFO L93 Difference]: Finished difference Result 132 states and 180 transitions. [2024-09-18 16:08:07,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-18 16:08:07,736 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2024-09-18 16:08:07,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:07,738 INFO L225 Difference]: With dead ends: 132 [2024-09-18 16:08:07,738 INFO L226 Difference]: Without dead ends: 130 [2024-09-18 16:08:07,738 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-09-18 16:08:07,739 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 99 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:07,739 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 316 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-18 16:08:07,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-18 16:08:07,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2024-09-18 16:08:07,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-18 16:08:07,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2024-09-18 16:08:07,770 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 41 [2024-09-18 16:08:07,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:07,771 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2024-09-18 16:08:07,771 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-18 16:08:07,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:07,771 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2024-09-18 16:08:07,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-18 16:08:07,772 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:07,773 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 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] [2024-09-18 16:08:07,789 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-18 16:08:07,975 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:07,975 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:07,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:07,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1994416550, now seen corresponding path program 1 times [2024-09-18 16:08:07,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:07,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154280075] [2024-09-18 16:08:07,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:07,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:08:07,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214710592] [2024-09-18 16:08:07,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:07,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:07,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:07,998 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) [2024-09-18 16:08:08,001 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 16:08:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:08,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 16:08:08,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:08:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-18 16:08:08,090 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:08:08,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:08,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154280075] [2024-09-18 16:08:08,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:08:08,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214710592] [2024-09-18 16:08:08,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214710592] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:08:08,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:08:08,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:08:08,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996811664] [2024-09-18 16:08:08,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:08:08,092 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:08:08,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:08,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:08:08,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:08:08,093 INFO L87 Difference]: Start difference. First operand 109 states and 146 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-18 16:08:08,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:08,177 INFO L93 Difference]: Finished difference Result 155 states and 218 transitions. [2024-09-18 16:08:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:08:08,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-09-18 16:08:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:08,179 INFO L225 Difference]: With dead ends: 155 [2024-09-18 16:08:08,179 INFO L226 Difference]: Without dead ends: 153 [2024-09-18 16:08:08,180 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:08:08,180 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:08,181 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:08:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-18 16:08:08,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2024-09-18 16:08:08,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 93 states have internal predecessors, (118), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-18 16:08:08,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 210 transitions. [2024-09-18 16:08:08,237 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 210 transitions. Word has length 46 [2024-09-18 16:08:08,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:08,238 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 210 transitions. [2024-09-18 16:08:08,238 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-18 16:08:08,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:08,238 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 210 transitions. [2024-09-18 16:08:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-18 16:08:08,241 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:08,242 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:08,258 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 16:08:08,442 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-18 16:08:08,443 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:08,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:08,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1824834714, now seen corresponding path program 1 times [2024-09-18 16:08:08,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:08,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88194745] [2024-09-18 16:08:08,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:08,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:08:08,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602412188] [2024-09-18 16:08:08,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:08,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:08,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:08,458 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) [2024-09-18 16:08:08,459 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 16:08:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:08,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-18 16:08:08,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:08:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 16:08:08,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:08:08,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:08,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88194745] [2024-09-18 16:08:08,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:08:08,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602412188] [2024-09-18 16:08:08,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602412188] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:08:08,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:08:08,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-18 16:08:08,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052383117] [2024-09-18 16:08:08,686 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:08:08,687 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 16:08:08,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:08,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 16:08:08,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-18 16:08:08,688 INFO L87 Difference]: Start difference. First operand 147 states and 210 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-18 16:08:08,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:08,873 INFO L93 Difference]: Finished difference Result 174 states and 246 transitions. [2024-09-18 16:08:08,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 16:08:08,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2024-09-18 16:08:08,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:08,876 INFO L225 Difference]: With dead ends: 174 [2024-09-18 16:08:08,876 INFO L226 Difference]: Without dead ends: 172 [2024-09-18 16:08:08,877 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-18 16:08:08,878 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 26 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:08,879 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 221 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:08:08,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-18 16:08:08,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-09-18 16:08:08,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 105 states have (on average 1.276190476190476) internal successors, (134), 106 states have internal predecessors, (134), 55 states have call successors, (55), 10 states have call predecessors, (55), 9 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-18 16:08:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 242 transitions. [2024-09-18 16:08:08,935 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 242 transitions. Word has length 46 [2024-09-18 16:08:08,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:08,935 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 242 transitions. [2024-09-18 16:08:08,935 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-18 16:08:08,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:08,936 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 242 transitions. [2024-09-18 16:08:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-18 16:08:08,937 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:08,937 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:08,953 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-18 16:08:09,137 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:09,138 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:09,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:09,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1598858537, now seen corresponding path program 1 times [2024-09-18 16:08:09,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:09,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666793127] [2024-09-18 16:08:09,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:09,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:08:09,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87443899] [2024-09-18 16:08:09,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:09,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:09,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:09,152 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) [2024-09-18 16:08:09,153 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 16:08:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:09,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 16:08:09,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:08:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 16:08:09,237 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:08:09,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:09,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666793127] [2024-09-18 16:08:09,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:08:09,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87443899] [2024-09-18 16:08:09,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87443899] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:08:09,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:08:09,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:08:09,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905455853] [2024-09-18 16:08:09,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:08:09,238 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:08:09,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:09,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:08:09,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:08:09,239 INFO L87 Difference]: Start difference. First operand 170 states and 242 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-18 16:08:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:09,366 INFO L93 Difference]: Finished difference Result 254 states and 385 transitions. [2024-09-18 16:08:09,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:08:09,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2024-09-18 16:08:09,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:09,369 INFO L225 Difference]: With dead ends: 254 [2024-09-18 16:08:09,370 INFO L226 Difference]: Without dead ends: 252 [2024-09-18 16:08:09,371 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:08:09,371 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 140 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 [2024-09-18 16:08:09,372 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 140 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:08:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-09-18 16:08:09,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 234. [2024-09-18 16:08:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 133 states have internal predecessors, (149), 103 states have call successors, (103), 11 states have call predecessors, (103), 10 states have return successors, (101), 89 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-18 16:08:09,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 353 transitions. [2024-09-18 16:08:09,452 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 353 transitions. Word has length 51 [2024-09-18 16:08:09,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:09,453 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 353 transitions. [2024-09-18 16:08:09,453 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-18 16:08:09,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:09,454 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 353 transitions. [2024-09-18 16:08:09,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-18 16:08:09,454 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:09,455 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:09,472 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-18 16:08:09,655 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:09,655 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:09,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:09,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1695820567, now seen corresponding path program 2 times [2024-09-18 16:08:09,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:09,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895413867] [2024-09-18 16:08:09,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:09,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:09,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:08:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:09,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:08:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:09,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:08:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:09,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:08:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:09,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:08:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:09,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-18 16:08:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 16:08:09,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:09,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895413867] [2024-09-18 16:08:09,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895413867] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:08:09,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:08:09,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:08:09,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147835514] [2024-09-18 16:08:09,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:08:09,753 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:08:09,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:09,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:08:09,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:08:09,754 INFO L87 Difference]: Start difference. First operand 234 states and 353 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-18 16:08:09,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:09,878 INFO L93 Difference]: Finished difference Result 291 states and 429 transitions. [2024-09-18 16:08:09,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 16:08:09,879 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2024-09-18 16:08:09,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:09,882 INFO L225 Difference]: With dead ends: 291 [2024-09-18 16:08:09,882 INFO L226 Difference]: Without dead ends: 177 [2024-09-18 16:08:09,884 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-18 16:08:09,885 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:09,885 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 168 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:08:09,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-18 16:08:09,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 169. [2024-09-18 16:08:09,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 71 states have call successors, (71), 11 states have call predecessors, (71), 10 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2024-09-18 16:08:09,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 243 transitions. [2024-09-18 16:08:09,944 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 243 transitions. Word has length 51 [2024-09-18 16:08:09,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:09,944 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 243 transitions. [2024-09-18 16:08:09,944 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-18 16:08:09,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:09,945 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 243 transitions. [2024-09-18 16:08:09,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-18 16:08:09,947 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:09,947 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:09,947 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-18 16:08:09,948 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:09,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:09,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1173987183, now seen corresponding path program 1 times [2024-09-18 16:08:09,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:09,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477914807] [2024-09-18 16:08:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:09,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:08:09,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114220091] [2024-09-18 16:08:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:09,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:09,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:09,969 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) [2024-09-18 16:08:09,970 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 16:08:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:10,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-18 16:08:10,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:08:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 16:08:10,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:08:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-18 16:08:12,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:12,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477914807] [2024-09-18 16:08:12,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:08:12,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114220091] [2024-09-18 16:08:12,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114220091] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:08:12,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:08:12,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2024-09-18 16:08:12,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049060240] [2024-09-18 16:08:12,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:08:12,068 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-18 16:08:12,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:12,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-18 16:08:12,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-09-18 16:08:12,069 INFO L87 Difference]: Start difference. First operand 169 states and 243 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 21 states have internal predecessors, (46), 8 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-18 16:08:15,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:15,864 INFO L93 Difference]: Finished difference Result 324 states and 489 transitions. [2024-09-18 16:08:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-18 16:08:15,864 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 21 states have internal predecessors, (46), 8 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 63 [2024-09-18 16:08:15,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:15,867 INFO L225 Difference]: With dead ends: 324 [2024-09-18 16:08:15,867 INFO L226 Difference]: Without dead ends: 316 [2024-09-18 16:08:15,868 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=329, Invalid=1563, Unknown=0, NotChecked=0, Total=1892 [2024-09-18 16:08:15,869 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 241 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:15,869 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 489 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-18 16:08:15,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-18 16:08:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 239. [2024-09-18 16:08:15,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 128 states have (on average 1.203125) internal successors, (154), 138 states have internal predecessors, (154), 99 states have call successors, (99), 12 states have call predecessors, (99), 11 states have return successors, (97), 88 states have call predecessors, (97), 97 states have call successors, (97) [2024-09-18 16:08:15,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 350 transitions. [2024-09-18 16:08:15,968 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 350 transitions. Word has length 63 [2024-09-18 16:08:15,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:15,968 INFO L474 AbstractCegarLoop]: Abstraction has 239 states and 350 transitions. [2024-09-18 16:08:15,969 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 21 states have internal predecessors, (46), 8 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-18 16:08:15,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:15,969 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 350 transitions. [2024-09-18 16:08:15,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-18 16:08:15,970 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:15,970 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:15,985 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-18 16:08:16,170 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:16,171 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:16,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:16,171 INFO L85 PathProgramCache]: Analyzing trace with hash 819880594, now seen corresponding path program 2 times [2024-09-18 16:08:16,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:16,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915400959] [2024-09-18 16:08:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:16,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:16,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:08:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:16,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:08:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:16,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:08:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:16,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:08:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:16,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:08:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:16,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 16:08:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:16,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-18 16:08:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:16,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-18 16:08:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:16,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-18 16:08:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-18 16:08:16,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:16,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915400959] [2024-09-18 16:08:16,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915400959] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:08:16,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396453085] [2024-09-18 16:08:16,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:08:16,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:16,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:16,292 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) [2024-09-18 16:08:16,296 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 16:08:16,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:08:16,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:08:16,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-18 16:08:16,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:08:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-18 16:08:16,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:08:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-18 16:08:16,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396453085] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:08:16,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:08:16,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2024-09-18 16:08:16,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599250246] [2024-09-18 16:08:16,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:08:16,488 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 16:08:16,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:16,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 16:08:16,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-18 16:08:16,488 INFO L87 Difference]: Start difference. First operand 239 states and 350 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-18 16:08:16,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:16,861 INFO L93 Difference]: Finished difference Result 363 states and 544 transitions. [2024-09-18 16:08:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-18 16:08:16,862 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 68 [2024-09-18 16:08:16,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:16,868 INFO L225 Difference]: With dead ends: 363 [2024-09-18 16:08:16,868 INFO L226 Difference]: Without dead ends: 356 [2024-09-18 16:08:16,868 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 153 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2024-09-18 16:08:16,869 INFO L434 NwaCegarLoop]: 72 mSDtfsCounter, 56 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:16,869 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 378 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:08:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2024-09-18 16:08:16,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 237. [2024-09-18 16:08:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 130 states have (on average 1.2307692307692308) internal successors, (160), 137 states have internal predecessors, (160), 95 states have call successors, (95), 12 states have call predecessors, (95), 11 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2024-09-18 16:08:16,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 348 transitions. [2024-09-18 16:08:16,973 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 348 transitions. Word has length 68 [2024-09-18 16:08:16,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:16,974 INFO L474 AbstractCegarLoop]: Abstraction has 237 states and 348 transitions. [2024-09-18 16:08:16,974 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-18 16:08:16,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:16,974 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 348 transitions. [2024-09-18 16:08:16,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-18 16:08:16,975 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:16,975 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:16,991 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-18 16:08:17,176 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-18 16:08:17,176 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:17,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:17,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1431506047, now seen corresponding path program 1 times [2024-09-18 16:08:17,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:17,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576576489] [2024-09-18 16:08:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:17,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:17,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:08:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:17,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:08:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:17,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:08:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:17,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:08:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:17,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:08:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:17,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-18 16:08:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:17,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 16:08:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:17,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-18 16:08:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:17,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-18 16:08:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:17,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-18 16:08:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:17,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-18 16:08:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-18 16:08:17,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:17,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576576489] [2024-09-18 16:08:17,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576576489] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:08:17,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:08:17,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:08:17,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882213815] [2024-09-18 16:08:17,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:08:17,260 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:08:17,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:17,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:08:17,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:08:17,261 INFO L87 Difference]: Start difference. First operand 237 states and 348 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-18 16:08:17,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:17,393 INFO L93 Difference]: Finished difference Result 408 states and 596 transitions. [2024-09-18 16:08:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:08:17,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71 [2024-09-18 16:08:17,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:17,396 INFO L225 Difference]: With dead ends: 408 [2024-09-18 16:08:17,396 INFO L226 Difference]: Without dead ends: 246 [2024-09-18 16:08:17,396 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:08:17,397 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:17,397 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 129 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:08:17,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-09-18 16:08:17,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 228. [2024-09-18 16:08:17,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 130 states have internal predecessors, (158), 87 states have call successors, (87), 12 states have call predecessors, (87), 11 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-18 16:08:17,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 330 transitions. [2024-09-18 16:08:17,492 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 330 transitions. Word has length 71 [2024-09-18 16:08:17,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:17,492 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 330 transitions. [2024-09-18 16:08:17,492 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-18 16:08:17,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:17,493 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 330 transitions. [2024-09-18 16:08:17,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-18 16:08:17,493 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:17,493 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:17,494 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-18 16:08:17,494 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:17,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:17,494 INFO L85 PathProgramCache]: Analyzing trace with hash -683532968, now seen corresponding path program 1 times [2024-09-18 16:08:17,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:17,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968993708] [2024-09-18 16:08:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:17,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:08:17,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628375091] [2024-09-18 16:08:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:17,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:17,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:17,509 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) [2024-09-18 16:08:17,510 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 16:08:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:17,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-18 16:08:17,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:08:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-18 16:08:17,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:08:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-18 16:08:17,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:17,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968993708] [2024-09-18 16:08:17,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:08:17,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628375091] [2024-09-18 16:08:17,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628375091] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-18 16:08:17,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:08:17,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-18 16:08:17,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510852972] [2024-09-18 16:08:17,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:08:17,684 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:08:17,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:17,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:08:17,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-18 16:08:17,685 INFO L87 Difference]: Start difference. First operand 228 states and 330 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-18 16:08:17,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:17,806 INFO L93 Difference]: Finished difference Result 234 states and 335 transitions. [2024-09-18 16:08:17,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:08:17,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2024-09-18 16:08:17,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:17,809 INFO L225 Difference]: With dead ends: 234 [2024-09-18 16:08:17,809 INFO L226 Difference]: Without dead ends: 232 [2024-09-18 16:08:17,809 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-18 16:08:17,809 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 135 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 [2024-09-18 16:08:17,810 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 135 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:08:17,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-09-18 16:08:17,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2024-09-18 16:08:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 132 states have (on average 1.2196969696969697) internal successors, (161), 133 states have internal predecessors, (161), 87 states have call successors, (87), 13 states have call predecessors, (87), 12 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-18 16:08:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 333 transitions. [2024-09-18 16:08:17,886 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 333 transitions. Word has length 73 [2024-09-18 16:08:17,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:17,886 INFO L474 AbstractCegarLoop]: Abstraction has 232 states and 333 transitions. [2024-09-18 16:08:17,886 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-18 16:08:17,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:17,887 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 333 transitions. [2024-09-18 16:08:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-18 16:08:17,888 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:17,888 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:17,903 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-18 16:08:18,088 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 [2024-09-18 16:08:18,088 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:18,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:18,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1907222079, now seen corresponding path program 1 times [2024-09-18 16:08:18,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:18,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587681972] [2024-09-18 16:08:18,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:18,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:18,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:08:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:18,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:08:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:18,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:08:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:18,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:08:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:18,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:08:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:18,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-18 16:08:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:18,329 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 16:08:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:18,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-18 16:08:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:18,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-18 16:08:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:18,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-18 16:08:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-18 16:08:18,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:18,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587681972] [2024-09-18 16:08:18,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587681972] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:08:18,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404132333] [2024-09-18 16:08:18,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:18,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:18,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:18,345 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) [2024-09-18 16:08:18,347 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-18 16:08:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:18,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-18 16:08:18,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:08:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 11 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-18 16:08:18,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:08:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-18 16:08:18,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404132333] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:08:18,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:08:18,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-18 16:08:18,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308533459] [2024-09-18 16:08:18,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:08:18,636 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 16:08:18,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:18,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 16:08:18,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-09-18 16:08:18,637 INFO L87 Difference]: Start difference. First operand 232 states and 333 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-18 16:08:18,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:18,887 INFO L93 Difference]: Finished difference Result 322 states and 450 transitions. [2024-09-18 16:08:18,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-18 16:08:18,888 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 71 [2024-09-18 16:08:18,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:18,890 INFO L225 Difference]: With dead ends: 322 [2024-09-18 16:08:18,890 INFO L226 Difference]: Without dead ends: 161 [2024-09-18 16:08:18,891 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2024-09-18 16:08:18,891 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 44 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:18,891 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 355 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:08:18,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-18 16:08:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2024-09-18 16:08:18,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 95 states have internal predecessors, (108), 55 states have call successors, (55), 12 states have call predecessors, (55), 11 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-18 16:08:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 216 transitions. [2024-09-18 16:08:18,965 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 216 transitions. Word has length 71 [2024-09-18 16:08:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:18,965 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 216 transitions. [2024-09-18 16:08:18,966 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-18 16:08:18,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:18,966 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 216 transitions. [2024-09-18 16:08:18,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-18 16:08:18,968 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:18,968 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:18,988 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-18 16:08:19,168 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 [2024-09-18 16:08:19,169 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:19,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:19,169 INFO L85 PathProgramCache]: Analyzing trace with hash 992091053, now seen corresponding path program 2 times [2024-09-18 16:08:19,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:19,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317283545] [2024-09-18 16:08:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:19,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:19,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:08:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:19,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:08:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:19,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:08:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:19,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:08:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:19,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:08:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:19,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 16:08:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:19,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-18 16:08:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:19,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-18 16:08:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:19,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-18 16:08:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-18 16:08:19,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:19,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317283545] [2024-09-18 16:08:19,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317283545] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:08:19,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498216930] [2024-09-18 16:08:19,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:08:19,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:19,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:19,333 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) [2024-09-18 16:08:19,335 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-18 16:08:19,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:08:19,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:08:19,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-18 16:08:19,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:08:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-18 16:08:19,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:08:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-18 16:08:19,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498216930] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:08:19,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:08:19,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2024-09-18 16:08:19,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821169095] [2024-09-18 16:08:19,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:08:19,625 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-18 16:08:19,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:19,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-18 16:08:19,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-09-18 16:08:19,625 INFO L87 Difference]: Start difference. First operand 160 states and 216 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-18 16:08:19,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:19,886 INFO L93 Difference]: Finished difference Result 216 states and 290 transitions. [2024-09-18 16:08:19,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-18 16:08:19,887 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 71 [2024-09-18 16:08:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:19,888 INFO L225 Difference]: With dead ends: 216 [2024-09-18 16:08:19,888 INFO L226 Difference]: Without dead ends: 156 [2024-09-18 16:08:19,889 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2024-09-18 16:08:19,889 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 67 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:19,890 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 346 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:08:19,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-09-18 16:08:19,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2024-09-18 16:08:19,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 89 states have internal predecessors, (100), 55 states have call successors, (55), 12 states have call predecessors, (55), 11 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-18 16:08:19,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 208 transitions. [2024-09-18 16:08:19,957 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 208 transitions. Word has length 71 [2024-09-18 16:08:19,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:19,957 INFO L474 AbstractCegarLoop]: Abstraction has 154 states and 208 transitions. [2024-09-18 16:08:19,957 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-18 16:08:19,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 208 transitions. [2024-09-18 16:08:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-18 16:08:19,958 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:19,959 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:19,966 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-18 16:08:20,159 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 [2024-09-18 16:08:20,159 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:20,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:20,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1837389712, now seen corresponding path program 1 times [2024-09-18 16:08:20,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:20,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276995184] [2024-09-18 16:08:20,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:20,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:08:20,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231857340] [2024-09-18 16:08:20,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:20,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:20,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:20,180 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) [2024-09-18 16:08:20,182 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-18 16:08:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:20,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-18 16:08:20,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:08:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 19 proven. 19 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-09-18 16:08:21,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:08:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-18 16:08:24,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:24,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276995184] [2024-09-18 16:08:24,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:08:24,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231857340] [2024-09-18 16:08:24,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231857340] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:08:24,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:08:24,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2024-09-18 16:08:24,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776640131] [2024-09-18 16:08:24,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:08:24,119 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-18 16:08:24,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:24,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-18 16:08:24,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2024-09-18 16:08:24,120 INFO L87 Difference]: Start difference. First operand 154 states and 208 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 23 states have internal predecessors, (50), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-18 16:08:26,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:26,401 INFO L93 Difference]: Finished difference Result 185 states and 252 transitions. [2024-09-18 16:08:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-18 16:08:26,401 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 23 states have internal predecessors, (50), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 85 [2024-09-18 16:08:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:26,403 INFO L225 Difference]: With dead ends: 185 [2024-09-18 16:08:26,403 INFO L226 Difference]: Without dead ends: 171 [2024-09-18 16:08:26,404 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2024-09-18 16:08:26,404 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 55 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:26,404 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 713 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-18 16:08:26,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-09-18 16:08:26,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 151. [2024-09-18 16:08:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 86 states have internal predecessors, (96), 55 states have call successors, (55), 12 states have call predecessors, (55), 11 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-18 16:08:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 204 transitions. [2024-09-18 16:08:26,481 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 204 transitions. Word has length 85 [2024-09-18 16:08:26,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:26,481 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 204 transitions. [2024-09-18 16:08:26,481 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 23 states have internal predecessors, (50), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-18 16:08:26,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:26,482 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 204 transitions. [2024-09-18 16:08:26,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-18 16:08:26,482 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:26,482 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1, 1] [2024-09-18 16:08:26,499 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-18 16:08:26,683 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-18 16:08:26,683 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:26,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:26,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1726226259, now seen corresponding path program 2 times [2024-09-18 16:08:26,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:26,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369604033] [2024-09-18 16:08:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:26,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:08:26,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732995593] [2024-09-18 16:08:26,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:08:26,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:26,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:26,706 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:08:26,711 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-18 16:08:26,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:08:26,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:08:26,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-18 16:08:26,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:08:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 33 proven. 32 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-18 16:08:27,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:08:31,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:31,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369604033] [2024-09-18 16:08:31,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:08:31,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732995593] [2024-09-18 16:08:31,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732995593] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:08:31,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:08:31,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-18 16:08:31,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705734372] [2024-09-18 16:08:31,447 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:08:31,447 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-18 16:08:31,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:31,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-18 16:08:31,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2024-09-18 16:08:31,448 INFO L87 Difference]: Start difference. First operand 151 states and 204 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-18 16:08:32,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:32,348 INFO L93 Difference]: Finished difference Result 230 states and 317 transitions. [2024-09-18 16:08:32,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-18 16:08:32,348 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 90 [2024-09-18 16:08:32,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:32,350 INFO L225 Difference]: With dead ends: 230 [2024-09-18 16:08:32,350 INFO L226 Difference]: Without dead ends: 227 [2024-09-18 16:08:32,351 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2024-09-18 16:08:32,351 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 81 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:32,352 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 661 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 16:08:32,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-18 16:08:32,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 216. [2024-09-18 16:08:32,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 118 states have (on average 1.1694915254237288) internal successors, (138), 120 states have internal predecessors, (138), 83 states have call successors, (83), 15 states have call predecessors, (83), 14 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2024-09-18 16:08:32,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 302 transitions. [2024-09-18 16:08:32,463 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 302 transitions. Word has length 90 [2024-09-18 16:08:32,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:32,464 INFO L474 AbstractCegarLoop]: Abstraction has 216 states and 302 transitions. [2024-09-18 16:08:32,464 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-18 16:08:32,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:32,464 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 302 transitions. [2024-09-18 16:08:32,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-09-18 16:08:32,465 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:32,465 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:32,478 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-18 16:08:32,665 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-18 16:08:32,665 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:32,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:32,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1364880258, now seen corresponding path program 1 times [2024-09-18 16:08:32,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:32,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782356776] [2024-09-18 16:08:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:32,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:32,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:08:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:32,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:08:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:32,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:08:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:32,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:08:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:32,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:08:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:32,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-18 16:08:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:32,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 16:08:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:32,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-18 16:08:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:32,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-18 16:08:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:32,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-18 16:08:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:32,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-18 16:08:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:32,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-18 16:08:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:32,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-18 16:08:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:32,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-18 16:08:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:32,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-18 16:08:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-09-18 16:08:32,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:32,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782356776] [2024-09-18 16:08:32,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782356776] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:08:32,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113259882] [2024-09-18 16:08:32,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:32,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:32,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:32,952 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:08:32,954 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-18 16:08:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:33,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-18 16:08:33,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:08:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 90 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-09-18 16:08:33,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:08:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-09-18 16:08:33,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113259882] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:08:33,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:08:33,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2024-09-18 16:08:33,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652082974] [2024-09-18 16:08:33,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:08:33,402 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-18 16:08:33,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:33,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-18 16:08:33,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-09-18 16:08:33,404 INFO L87 Difference]: Start difference. First operand 216 states and 302 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 10 states have call predecessors, (37), 10 states have call successors, (37) [2024-09-18 16:08:33,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:33,791 INFO L93 Difference]: Finished difference Result 238 states and 319 transitions. [2024-09-18 16:08:33,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-18 16:08:33,792 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 10 states have call predecessors, (37), 10 states have call successors, (37) Word has length 93 [2024-09-18 16:08:33,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:33,793 INFO L225 Difference]: With dead ends: 238 [2024-09-18 16:08:33,793 INFO L226 Difference]: Without dead ends: 178 [2024-09-18 16:08:33,794 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2024-09-18 16:08:33,794 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 55 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:33,794 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 388 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 16:08:33,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-09-18 16:08:33,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2024-09-18 16:08:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 99 states have (on average 1.1818181818181819) internal successors, (117), 100 states have internal predecessors, (117), 67 states have call successors, (67), 12 states have call predecessors, (67), 11 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2024-09-18 16:08:33,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 249 transitions. [2024-09-18 16:08:33,891 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 249 transitions. Word has length 93 [2024-09-18 16:08:33,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:33,891 INFO L474 AbstractCegarLoop]: Abstraction has 178 states and 249 transitions. [2024-09-18 16:08:33,892 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 10 states have call predecessors, (37), 10 states have call successors, (37) [2024-09-18 16:08:33,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:33,892 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 249 transitions. [2024-09-18 16:08:33,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-18 16:08:33,893 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:33,893 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:33,910 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-18 16:08:34,093 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:34,094 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:34,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:34,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1100697445, now seen corresponding path program 1 times [2024-09-18 16:08:34,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:34,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929981742] [2024-09-18 16:08:34,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:34,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:34,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:08:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:34,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:08:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:34,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:08:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:34,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:08:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:34,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:08:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:34,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 16:08:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:34,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-18 16:08:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:34,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-18 16:08:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:34,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-18 16:08:34,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:34,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-18 16:08:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:34,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-18 16:08:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:34,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-18 16:08:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:34,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-18 16:08:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:34,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-18 16:08:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:34,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-18 16:08:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 31 proven. 20 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-09-18 16:08:34,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:34,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929981742] [2024-09-18 16:08:34,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929981742] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:08:34,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715969099] [2024-09-18 16:08:34,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:34,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:34,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:34,326 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:08:34,334 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-18 16:08:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:34,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-18 16:08:34,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:08:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 93 proven. 18 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-09-18 16:08:34,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:08:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 31 proven. 20 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-09-18 16:08:34,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715969099] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:08:34,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:08:34,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2024-09-18 16:08:34,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294233027] [2024-09-18 16:08:34,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:08:34,784 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 16:08:34,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:34,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 16:08:34,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-09-18 16:08:34,786 INFO L87 Difference]: Start difference. First operand 178 states and 249 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 10 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) [2024-09-18 16:08:35,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:35,113 INFO L93 Difference]: Finished difference Result 235 states and 312 transitions. [2024-09-18 16:08:35,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 16:08:35,114 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 10 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) Word has length 98 [2024-09-18 16:08:35,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:35,115 INFO L225 Difference]: With dead ends: 235 [2024-09-18 16:08:35,115 INFO L226 Difference]: Without dead ends: 123 [2024-09-18 16:08:35,116 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 212 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2024-09-18 16:08:35,116 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 48 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:35,117 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 448 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 16:08:35,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-09-18 16:08:35,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 117. [2024-09-18 16:08:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 72 states have internal predecessors, (77), 35 states have call successors, (35), 11 states have call predecessors, (35), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2024-09-18 16:08:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 145 transitions. [2024-09-18 16:08:35,168 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 145 transitions. Word has length 98 [2024-09-18 16:08:35,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:35,169 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 145 transitions. [2024-09-18 16:08:35,169 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 10 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) [2024-09-18 16:08:35,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:35,169 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 145 transitions. [2024-09-18 16:08:35,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-18 16:08:35,170 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:35,170 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:35,184 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-18 16:08:35,370 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:35,370 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:35,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:35,371 INFO L85 PathProgramCache]: Analyzing trace with hash 624981413, now seen corresponding path program 2 times [2024-09-18 16:08:35,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:35,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584600678] [2024-09-18 16:08:35,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:35,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:35,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:08:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:35,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:08:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:35,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:08:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:35,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:08:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:35,640 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:08:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:35,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 16:08:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:35,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-18 16:08:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:35,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-18 16:08:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:35,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-18 16:08:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:35,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-18 16:08:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:35,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-18 16:08:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:35,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-18 16:08:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:35,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-18 16:08:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:35,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-18 16:08:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-09-18 16:08:35,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:35,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584600678] [2024-09-18 16:08:35,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584600678] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:08:35,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891966508] [2024-09-18 16:08:35,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:08:35,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:35,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:35,674 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:08:35,675 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-18 16:08:35,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:08:35,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:08:35,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-18 16:08:35,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:08:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 67 proven. 21 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2024-09-18 16:08:35,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:08:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-09-18 16:08:36,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891966508] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:08:36,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:08:36,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 27 [2024-09-18 16:08:36,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938271225] [2024-09-18 16:08:36,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:08:36,144 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-18 16:08:36,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:36,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-18 16:08:36,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2024-09-18 16:08:36,145 INFO L87 Difference]: Start difference. First operand 117 states and 145 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 24 states have internal predecessors, (71), 11 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (37), 11 states have call predecessors, (37), 11 states have call successors, (37) [2024-09-18 16:08:36,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:36,641 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2024-09-18 16:08:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-18 16:08:36,642 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 24 states have internal predecessors, (71), 11 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (37), 11 states have call predecessors, (37), 11 states have call successors, (37) Word has length 98 [2024-09-18 16:08:36,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:36,643 INFO L225 Difference]: With dead ends: 138 [2024-09-18 16:08:36,643 INFO L226 Difference]: Without dead ends: 73 [2024-09-18 16:08:36,644 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=346, Invalid=1294, Unknown=0, NotChecked=0, Total=1640 [2024-09-18 16:08:36,644 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 76 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:36,645 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 426 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 16:08:36,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-18 16:08:36,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-18 16:08:36,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 19 states have call successors, (19), 9 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-18 16:08:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2024-09-18 16:08:36,675 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 98 [2024-09-18 16:08:36,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:36,675 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2024-09-18 16:08:36,675 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 24 states have internal predecessors, (71), 11 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (37), 11 states have call predecessors, (37), 11 states have call successors, (37) [2024-09-18 16:08:36,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:36,676 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2024-09-18 16:08:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-18 16:08:36,676 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:08:36,676 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:36,694 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-18 16:08:36,880 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:36,881 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:08:36,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:36,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1998153044, now seen corresponding path program 3 times [2024-09-18 16:08:36,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:08:36,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633758684] [2024-09-18 16:08:36,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:08:36,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:08:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:37,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:08:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:37,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:08:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:37,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:08:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:37,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:08:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:37,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:08:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:37,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 16:08:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:37,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-18 16:08:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:37,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-18 16:08:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:37,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-18 16:08:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:37,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-18 16:08:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:37,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-18 16:08:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:37,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-18 16:08:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:37,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-18 16:08:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:37,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-18 16:08:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:37,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-18 16:08:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:37,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-18 16:08:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:37,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-18 16:08:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:08:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-09-18 16:08:37,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:08:37,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633758684] [2024-09-18 16:08:37,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633758684] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:08:37,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067725667] [2024-09-18 16:08:37,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 16:08:37,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:08:37,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:08:37,117 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 16:08:37,118 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-18 16:08:37,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-18 16:08:37,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:08:37,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-18 16:08:37,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:08:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 71 proven. 20 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-09-18 16:08:38,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:08:40,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067725667] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:08:40,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:08:40,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 28 [2024-09-18 16:08:40,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217994901] [2024-09-18 16:08:40,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:08:40,959 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-18 16:08:40,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:08:40,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-18 16:08:40,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2024-09-18 16:08:40,960 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 25 states have internal predecessors, (63), 10 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (28), 9 states have call predecessors, (28), 8 states have call successors, (28) [2024-09-18 16:08:41,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:08:41,713 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2024-09-18 16:08:41,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-18 16:08:41,714 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 25 states have internal predecessors, (63), 10 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (28), 9 states have call predecessors, (28), 8 states have call successors, (28) Word has length 112 [2024-09-18 16:08:41,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:08:41,714 INFO L225 Difference]: With dead ends: 77 [2024-09-18 16:08:41,714 INFO L226 Difference]: Without dead ends: 0 [2024-09-18 16:08:41,715 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2024-09-18 16:08:41,716 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:08:41,716 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 477 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 16:08:41,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-18 16:08:41,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-18 16:08:41,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-18 16:08:41,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-18 16:08:41,717 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 112 [2024-09-18 16:08:41,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:08:41,717 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-18 16:08:41,718 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 25 states have internal predecessors, (63), 10 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (28), 9 states have call predecessors, (28), 8 states have call successors, (28) [2024-09-18 16:08:41,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:08:41,718 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-18 16:08:41,718 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-18 16:08:41,720 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-18 16:08:41,727 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-18 16:08:41,924 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-18 16:08:41,927 INFO L408 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:08:41,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-18 16:08:48,690 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-18 16:08:48,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 04:08:48 BoogieIcfgContainer [2024-09-18 16:08:48,726 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-18 16:08:48,726 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-18 16:08:48,726 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-18 16:08:48,726 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-18 16:08:48,727 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:08:02" (3/4) ... [2024-09-18 16:08:48,729 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-18 16:08:48,778 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-18 16:08:48,778 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-18 16:08:48,778 INFO L158 Benchmark]: Toolchain (without parser) took 46774.38ms. Allocated memory was 159.4MB in the beginning and 461.4MB in the end (delta: 302.0MB). Free memory was 104.4MB in the beginning and 323.8MB in the end (delta: -219.4MB). Peak memory consumption was 84.0MB. Max. memory is 16.1GB. [2024-09-18 16:08:48,779 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 159.4MB. Free memory is still 119.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-18 16:08:48,780 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.31ms. Allocated memory is still 159.4MB. Free memory was 104.0MB in the beginning and 92.2MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-18 16:08:48,780 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.44ms. Allocated memory is still 159.4MB. Free memory was 92.2MB in the beginning and 90.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-18 16:08:48,781 INFO L158 Benchmark]: Boogie Preprocessor took 49.25ms. Allocated memory is still 159.4MB. Free memory was 90.9MB in the beginning and 89.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 16:08:48,781 INFO L158 Benchmark]: RCFGBuilder took 356.84ms. Allocated memory is still 159.4MB. Free memory was 89.3MB in the beginning and 75.0MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-18 16:08:48,783 INFO L158 Benchmark]: TraceAbstraction took 46046.02ms. Allocated memory was 159.4MB in the beginning and 461.4MB in the end (delta: 302.0MB). Free memory was 74.6MB in the beginning and 325.9MB in the end (delta: -251.3MB). Peak memory consumption was 178.4MB. Max. memory is 16.1GB. [2024-09-18 16:08:48,783 INFO L158 Benchmark]: Witness Printer took 51.72ms. Allocated memory is still 461.4MB. Free memory was 325.9MB in the beginning and 323.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 16:08:48,784 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 159.4MB. Free memory is still 119.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 243.31ms. Allocated memory is still 159.4MB. Free memory was 104.0MB in the beginning and 92.2MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.44ms. Allocated memory is still 159.4MB. Free memory was 92.2MB in the beginning and 90.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 49.25ms. Allocated memory is still 159.4MB. Free memory was 90.9MB in the beginning and 89.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 356.84ms. Allocated memory is still 159.4MB. Free memory was 89.3MB in the beginning and 75.0MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 46046.02ms. Allocated memory was 159.4MB in the beginning and 461.4MB in the end (delta: 302.0MB). Free memory was 74.6MB in the beginning and 325.9MB in the end (delta: -251.3MB). Peak memory consumption was 178.4MB. Max. memory is 16.1GB. * Witness Printer took 51.72ms. Allocated memory is still 461.4MB. Free memory was 325.9MB in the beginning and 323.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 39.2s, OverallIterations: 22, TraceHistogramMax: 13, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 12.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1075 SdHoareTripleChecker+Valid, 6.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1006 mSDsluCounter, 6590 SdHoareTripleChecker+Invalid, 5.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5654 mSDsCounter, 669 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4848 IncrementalHoareTripleChecker+Invalid, 5517 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 669 mSolverCounterUnsat, 936 mSDtfsCounter, 4848 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2584 GetRequests, 2152 SyntacticMatches, 33 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2307 ImplicationChecksByTransitivity, 14.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=239occurred in iteration=11, InterpolantAutomatonStates: 254, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 22 MinimizatonAttempts, 347 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 19.7s InterpolantComputationTime, 2629 NumberOfCodeBlocks, 2582 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 2815 ConstructedInterpolants, 0 QuantifiedInterpolants, 11894 SizeOfPredicates, 57 NumberOfNonLiveVariables, 2989 ConjunctsInSsa, 410 ConjunctsInUnsatCore, 41 InterpolantComputations, 9 PerfectInterpolantSequences, 4409/4834 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (((((((((((((((y == 2) && (b == 1)) && (s == 0)) && (p == 0)) && (k == 0)) && (r == 1)) && (c == 2)) && (v == 1)) && (x == 1)) && (d == 1)) && (a == 2)) && (q == 1)) || (((((((((((((v == ((__int128) d * b)) && (r == 0)) && (k == 0)) && (v <= c)) && (s == 1)) && (b == y)) && (b <= c)) && (q == 0)) && (1 <= y)) && (a == x)) && (c == x)) && (x <= 2)) && (p == 1))) || (((((((((((((y == 2) && (b == 1)) && (v <= 1)) && (s == 0)) && (p == 0)) && (k == 0)) && (r == 1)) && (c == 2)) && (x == 1)) && ((d % 2) == 0)) && (a == 2)) && (q == 1)) && (d == v))) || ((((((((((((y == 2) && (b == 1)) && (s == 0)) && (p == 0)) && (k == 0)) && (r == 1)) && (c == 2)) && (x == 1)) && (v == 2)) && (d == 2)) && (a == 2)) && (q == 1))) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((((b == 1) && (s == 0)) && (p == 0)) && (r == 1)) && (a == y)) && (x == 1)) && (a == 2)) && (q == 1)) || ((((((((1 <= x) && (y <= 2)) && (b == 0)) && (((((__int128) q * x) + a) + ((__int128) y * s)) == (((__int128) y * r) + ((__int128) p * x)))) && (a == (((__int128) y * r) + ((__int128) p * x)))) && (1 <= a)) && (1 <= y)) && (x <= 2))) || ((((((((((r == 0) && (y <= 2)) && (s == 1)) && (1 <= a)) && (b == y)) && (q == 0)) && (1 <= y)) && (a == x)) && (x <= 2)) && (p == 1))) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((((((((r == 0) && (s == 1)) && (((__int128) c + 1) <= ((__int128) b * 2))) && (1 <= a)) && (b == y)) && (q == 0)) && (c == 0)) && (a == x)) && ((y + ((__int128) k * y)) == ((__int128) b + x))) && (x <= 2)) && (p == 1)) || ((((((((((b == 1) && (s == 0)) && (p == 0)) && (k == 0)) && (r == 1)) && (a == y)) && (c == 2)) && (x == 1)) && (a == 2)) && (q == 1))) || ((((((((((((r == 0) && (y <= 2)) && (k == 0)) && (s == 1)) && (1 <= a)) && (b == y)) && (q == 0)) && (1 <= y)) && (a == x)) && (c == x)) && (x <= 2)) && (p == 1))) || ((((((((((y == 2) && (b == 1)) && (s == 0)) && (p == 0)) && (r == 1)) && (x == 1)) && (k == 2)) && (a == 2)) && (c == 0)) && (q == 1))) - ProcedureContractResult [Line: 7]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 10]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-18 16:08:48,824 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE