./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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/loops-crafted-1/mono-crafted_7.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 ae51dc9203c351522c25ee3116b2cda704928bb61769972b6b90792bfdf57f19 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 10:31:41,250 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 10:31:41,301 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 10:31:41,304 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 10:31:41,305 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 10:31:41,331 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 10:31:41,333 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 10:31:41,333 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 10:31:41,333 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 10:31:41,333 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 10:31:41,334 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 10:31:41,334 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 10:31:41,334 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 10:31:41,334 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 10:31:41,335 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 10:31:41,335 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 10:31:41,335 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 10:31:41,335 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 10:31:41,335 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 10:31:41,336 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 10:31:41,336 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 10:31:41,340 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 10:31:41,340 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 10:31:41,340 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 10:31:41,341 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 10:31:41,341 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 10:31:41,341 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 10:31:41,341 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 10:31:41,341 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 10:31:41,341 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 10:31:41,342 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 10:31:41,342 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 10:31:41,342 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:31:41,342 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 10:31:41,342 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 10:31:41,342 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 10:31:41,343 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 10:31:41,343 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 10:31:41,343 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 10:31:41,346 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 10:31:41,346 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 10:31:41,346 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 10:31:41,347 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 -> ae51dc9203c351522c25ee3116b2cda704928bb61769972b6b90792bfdf57f19 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.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true 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 [2024-09-25 10:31:41,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 10:31:41,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 10:31:41,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 10:31:41,644 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 10:31:41,644 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 10:31:41,645 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c [2024-09-25 10:31:43,039 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 10:31:43,210 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 10:31:43,211 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_7.c [2024-09-25 10:31:43,217 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/4e62d1ad7/1a43c90d7eb645eab4b10cccb69a9fb6/FLAGd3b11656c [2024-09-25 10:31:43,235 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/4e62d1ad7/1a43c90d7eb645eab4b10cccb69a9fb6 [2024-09-25 10:31:43,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 10:31:43,244 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 10:31:43,245 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 10:31:43,245 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 10:31:43,250 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 10:31:43,251 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:31:43" (1/1) ... [2024-09-25 10:31:43,251 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6990cda0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:31:43, skipping insertion in model container [2024-09-25 10:31:43,251 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:31:43" (1/1) ... [2024-09-25 10:31:43,265 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 10:31:43,383 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/loops-crafted-1/mono-crafted_7.c[318,331] [2024-09-25 10:31:43,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:31:43,410 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 10:31:43,421 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/loops-crafted-1/mono-crafted_7.c[318,331] [2024-09-25 10:31:43,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:31:43,439 INFO L204 MainTranslator]: Completed translation [2024-09-25 10:31:43,440 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:31:43 WrapperNode [2024-09-25 10:31:43,440 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 10:31:43,441 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 10:31:43,441 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 10:31:43,442 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 10:31:43,448 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:31:43" (1/1) ... [2024-09-25 10:31:43,453 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:31:43" (1/1) ... [2024-09-25 10:31:43,459 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 10:31:43,459 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 10:31:43,460 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 10:31:43,460 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 10:31:43,460 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 10:31:43,468 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:31:43" (1/1) ... [2024-09-25 10:31:43,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:31:43" (1/1) ... [2024-09-25 10:31:43,469 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:31:43" (1/1) ... [2024-09-25 10:31:43,477 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]. [2024-09-25 10:31:43,478 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:31:43" (1/1) ... [2024-09-25 10:31:43,478 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:31:43" (1/1) ... [2024-09-25 10:31:43,479 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:31:43" (1/1) ... [2024-09-25 10:31:43,482 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:31:43" (1/1) ... [2024-09-25 10:31:43,482 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:31:43" (1/1) ... [2024-09-25 10:31:43,483 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:31:43" (1/1) ... [2024-09-25 10:31:43,483 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 10:31:43,484 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 10:31:43,484 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 10:31:43,484 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 10:31:43,485 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:31:43" (1/1) ... [2024-09-25 10:31:43,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:31:43,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:31:43,524 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) [2024-09-25 10:31:43,536 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 [2024-09-25 10:31:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 10:31:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 10:31:43,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 10:31:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 10:31:43,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 10:31:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 10:31:43,581 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 10:31:43,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 10:31:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 10:31:43,583 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 10:31:43,633 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 10:31:43,635 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 10:31:43,760 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-25 10:31:43,761 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 10:31:43,783 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 10:31:43,784 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-25 10:31:43,784 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:31:43 BoogieIcfgContainer [2024-09-25 10:31:43,784 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 10:31:43,786 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 10:31:43,786 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 10:31:43,789 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 10:31:43,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:31:43" (1/3) ... [2024-09-25 10:31:43,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce61443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:31:43, skipping insertion in model container [2024-09-25 10:31:43,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:31:43" (2/3) ... [2024-09-25 10:31:43,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce61443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:31:43, skipping insertion in model container [2024-09-25 10:31:43,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:31:43" (3/3) ... [2024-09-25 10:31:43,794 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_7.c [2024-09-25 10:31:43,808 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 10:31:43,809 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 10:31:43,863 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 10:31:43,869 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;@5da42798, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 10:31:43,869 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 10:31:43,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 10:31:43,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-25 10:31:43,878 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:31:43,879 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:31:43,880 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:31:43,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:43,884 INFO L85 PathProgramCache]: Analyzing trace with hash -630439525, now seen corresponding path program 1 times [2024-09-25 10:31:43,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:31:43,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663355852] [2024-09-25 10:31:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:31:43,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:31:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:43,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:31:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:31:43,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:31:43,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663355852] [2024-09-25 10:31:43,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663355852] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:31:43,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:31:43,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-25 10:31:44,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2648911] [2024-09-25 10:31:44,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:31:44,004 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-25 10:31:44,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:31:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-25 10:31:44,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 10:31:44,024 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:44,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:31:44,045 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2024-09-25 10:31:44,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-25 10:31:44,047 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-25 10:31:44,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:31:44,052 INFO L225 Difference]: With dead ends: 31 [2024-09-25 10:31:44,052 INFO L226 Difference]: Without dead ends: 13 [2024-09-25 10:31:44,054 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 10:31:44,057 INFO L434 NwaCegarLoop]: 19 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, 19 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 [2024-09-25 10:31:44,058 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:31:44,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-09-25 10:31:44,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-09-25 10:31:44,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:44,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-09-25 10:31:44,083 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 11 [2024-09-25 10:31:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:31:44,084 INFO L474 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-09-25 10:31:44,084 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:44,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:44,085 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-09-25 10:31:44,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-25 10:31:44,085 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:31:44,085 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:31:44,086 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 10:31:44,086 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:31:44,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:44,087 INFO L85 PathProgramCache]: Analyzing trace with hash -920425119, now seen corresponding path program 1 times [2024-09-25 10:31:44,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:31:44,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075534170] [2024-09-25 10:31:44,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:31:44,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:31:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:44,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:31:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:44,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:31:44,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:31:44,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075534170] [2024-09-25 10:31:44,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075534170] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:31:44,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:31:44,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-25 10:31:44,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587172567] [2024-09-25 10:31:44,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:31:44,187 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-25 10:31:44,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:31:44,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-25 10:31:44,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-25 10:31:44,188 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:44,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:31:44,214 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2024-09-25 10:31:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-25 10:31:44,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-25 10:31:44,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:31:44,216 INFO L225 Difference]: With dead ends: 23 [2024-09-25 10:31:44,216 INFO L226 Difference]: Without dead ends: 15 [2024-09-25 10:31:44,217 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-25 10:31:44,218 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:31:44,219 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:31:44,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-09-25 10:31:44,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-09-25 10:31:44,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:44,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-09-25 10:31:44,243 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2024-09-25 10:31:44,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:31:44,244 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-09-25 10:31:44,244 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:44,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:44,245 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-09-25 10:31:44,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-25 10:31:44,246 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:31:44,246 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:31:44,246 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-25 10:31:44,247 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:31:44,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:44,247 INFO L85 PathProgramCache]: Analyzing trace with hash 478481828, now seen corresponding path program 1 times [2024-09-25 10:31:44,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:31:44,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101351555] [2024-09-25 10:31:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:31:44,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:31:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:44,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:31:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:31:44,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:31:44,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101351555] [2024-09-25 10:31:44,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101351555] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:31:44,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:31:44,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-25 10:31:44,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009671632] [2024-09-25 10:31:44,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:31:44,320 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-25 10:31:44,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:31:44,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-25 10:31:44,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-25 10:31:44,321 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:44,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:31:44,339 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2024-09-25 10:31:44,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-25 10:31:44,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-25 10:31:44,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:31:44,340 INFO L225 Difference]: With dead ends: 21 [2024-09-25 10:31:44,340 INFO L226 Difference]: Without dead ends: 16 [2024-09-25 10:31:44,340 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-25 10:31:44,341 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:31:44,341 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:31:44,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-25 10:31:44,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-25 10:31:44,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-09-25 10:31:44,349 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2024-09-25 10:31:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:31:44,349 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-09-25 10:31:44,349 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:44,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:44,351 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-09-25 10:31:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-25 10:31:44,352 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:31:44,352 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:31:44,352 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-25 10:31:44,352 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:31:44,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:44,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1983572541, now seen corresponding path program 1 times [2024-09-25 10:31:44,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:31:44,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001038045] [2024-09-25 10:31:44,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:31:44,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:31:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:44,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:31:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:31:44,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:31:44,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001038045] [2024-09-25 10:31:44,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001038045] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:31:44,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950129607] [2024-09-25 10:31:44,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:31:44,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:31:44,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:31:44,427 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) [2024-09-25 10:31:44,429 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 10:31:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:44,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-25 10:31:44,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:31:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:31:44,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:31:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:31:44,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950129607] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:31:44,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:31:44,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-09-25 10:31:44,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386372762] [2024-09-25 10:31:44,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:31:44,557 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 10:31:44,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:31:44,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 10:31:44,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-25 10:31:44,559 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:31:44,641 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2024-09-25 10:31:44,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 10:31:44,642 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-25 10:31:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:31:44,643 INFO L225 Difference]: With dead ends: 31 [2024-09-25 10:31:44,644 INFO L226 Difference]: Without dead ends: 22 [2024-09-25 10:31:44,644 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2024-09-25 10:31:44,645 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:31:44,645 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 40 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:31:44,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-25 10:31:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-25 10:31:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:44,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-09-25 10:31:44,652 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2024-09-25 10:31:44,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:31:44,652 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-09-25 10:31:44,653 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:44,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:44,653 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-09-25 10:31:44,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-25 10:31:44,654 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:31:44,654 INFO L216 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:31:44,667 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-25 10:31:44,857 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:31:44,858 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:31:44,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:44,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1818917457, now seen corresponding path program 1 times [2024-09-25 10:31:44,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:31:44,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522385940] [2024-09-25 10:31:44,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:31:44,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:31:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:44,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:31:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:31:44,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:31:44,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522385940] [2024-09-25 10:31:44,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522385940] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:31:44,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266306990] [2024-09-25 10:31:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:31:44,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:31:44,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:31:44,937 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) [2024-09-25 10:31:44,941 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 10:31:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:44,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-25 10:31:44,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:31:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:31:45,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:31:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:31:45,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266306990] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:31:45,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:31:45,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-25 10:31:45,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791942908] [2024-09-25 10:31:45,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:31:45,060 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-25 10:31:45,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:31:45,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-25 10:31:45,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-25 10:31:45,061 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:45,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:31:45,097 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2024-09-25 10:31:45,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 10:31:45,097 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-25 10:31:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:31:45,098 INFO L225 Difference]: With dead ends: 43 [2024-09-25 10:31:45,098 INFO L226 Difference]: Without dead ends: 30 [2024-09-25 10:31:45,098 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-25 10:31:45,099 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:31:45,099 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:31:45,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-25 10:31:45,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-25 10:31:45,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-09-25 10:31:45,109 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2024-09-25 10:31:45,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:31:45,110 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-09-25 10:31:45,110 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:45,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:45,112 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-09-25 10:31:45,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-25 10:31:45,112 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:31:45,112 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:31:45,127 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-25 10:31:45,313 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:31:45,314 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:31:45,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:45,314 INFO L85 PathProgramCache]: Analyzing trace with hash -244817955, now seen corresponding path program 2 times [2024-09-25 10:31:45,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:31:45,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805386280] [2024-09-25 10:31:45,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:31:45,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:31:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:45,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:31:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:31:45,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:31:45,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805386280] [2024-09-25 10:31:45,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805386280] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:31:45,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904853408] [2024-09-25 10:31:45,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:31:45,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:31:45,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:31:45,449 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) [2024-09-25 10:31:45,455 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 10:31:45,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:31:45,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:31:45,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-25 10:31:45,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:31:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:31:45,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:31:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:31:45,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904853408] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:31:45,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:31:45,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-09-25 10:31:45,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972592329] [2024-09-25 10:31:45,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:31:45,637 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-25 10:31:45,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:31:45,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-25 10:31:45,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-09-25 10:31:45,639 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:45,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:31:45,685 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2024-09-25 10:31:45,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 10:31:45,685 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2024-09-25 10:31:45,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:31:45,686 INFO L225 Difference]: With dead ends: 59 [2024-09-25 10:31:45,686 INFO L226 Difference]: Without dead ends: 46 [2024-09-25 10:31:45,686 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-09-25 10:31:45,687 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:31:45,687 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:31:45,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-25 10:31:45,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-09-25 10:31:45,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:45,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2024-09-25 10:31:45,693 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 29 [2024-09-25 10:31:45,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:31:45,694 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2024-09-25 10:31:45,694 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:45,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:45,694 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2024-09-25 10:31:45,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-25 10:31:45,695 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:31:45,695 INFO L216 NwaCegarLoop]: trace histogram [16, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:31:45,711 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-25 10:31:45,895 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-25 10:31:45,896 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:31:45,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:45,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1905739509, now seen corresponding path program 3 times [2024-09-25 10:31:45,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:31:45,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930735033] [2024-09-25 10:31:45,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:31:45,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:31:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:46,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:31:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:31:46,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:31:46,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930735033] [2024-09-25 10:31:46,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930735033] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:31:46,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586558584] [2024-09-25 10:31:46,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:31:46,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:31:46,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:31:46,227 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) [2024-09-25 10:31:46,229 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 10:31:46,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 10:31:46,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:31:46,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-25 10:31:46,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:31:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-25 10:31:46,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:31:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-25 10:31:46,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586558584] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:31:46,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:31:46,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 25 [2024-09-25 10:31:46,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036544338] [2024-09-25 10:31:46,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:31:46,429 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-25 10:31:46,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:31:46,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-25 10:31:46,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2024-09-25 10:31:46,431 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:46,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:31:46,632 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2024-09-25 10:31:46,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-25 10:31:46,632 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-25 10:31:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:31:46,633 INFO L225 Difference]: With dead ends: 71 [2024-09-25 10:31:46,633 INFO L226 Difference]: Without dead ends: 58 [2024-09-25 10:31:46,634 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=525, Invalid=1035, Unknown=0, NotChecked=0, Total=1560 [2024-09-25 10:31:46,635 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:31:46,635 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 46 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:31:46,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-25 10:31:46,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2024-09-25 10:31:46,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:46,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2024-09-25 10:31:46,641 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 45 [2024-09-25 10:31:46,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:31:46,641 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2024-09-25 10:31:46,641 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:46,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:46,642 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2024-09-25 10:31:46,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-25 10:31:46,643 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:31:46,643 INFO L216 NwaCegarLoop]: trace histogram [17, 15, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:31:46,655 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 10:31:46,843 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:31:46,844 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:31:46,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:46,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1704028856, now seen corresponding path program 4 times [2024-09-25 10:31:46,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:31:46,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066205462] [2024-09-25 10:31:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:31:46,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:31:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:47,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:31:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-25 10:31:47,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:31:47,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066205462] [2024-09-25 10:31:47,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066205462] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:31:47,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632021277] [2024-09-25 10:31:47,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:31:47,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:31:47,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:31:47,204 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) [2024-09-25 10:31:47,205 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 10:31:47,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:31:47,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:31:47,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 10:31:47,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:31:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-25 10:31:47,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:31:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-25 10:31:47,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632021277] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:31:47,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:31:47,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2024-09-25 10:31:47,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522327253] [2024-09-25 10:31:47,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:31:47,643 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-25 10:31:47,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:31:47,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-25 10:31:47,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 10:31:47,644 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:47,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:31:47,729 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2024-09-25 10:31:47,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-25 10:31:47,730 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2024-09-25 10:31:47,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:31:47,730 INFO L225 Difference]: With dead ends: 103 [2024-09-25 10:31:47,730 INFO L226 Difference]: Without dead ends: 86 [2024-09-25 10:31:47,731 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 10:31:47,731 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:31:47,732 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:31:47,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-25 10:31:47,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-09-25 10:31:47,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:47,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2024-09-25 10:31:47,750 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 51 [2024-09-25 10:31:47,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:31:47,751 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2024-09-25 10:31:47,751 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:47,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:47,751 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2024-09-25 10:31:47,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-25 10:31:47,753 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:31:47,753 INFO L216 NwaCegarLoop]: trace histogram [34, 32, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:31:47,771 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 10:31:47,953 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-25 10:31:47,954 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:31:47,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:47,955 INFO L85 PathProgramCache]: Analyzing trace with hash 753883691, now seen corresponding path program 5 times [2024-09-25 10:31:47,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:31:47,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910454823] [2024-09-25 10:31:47,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:31:47,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:31:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:48,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:31:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-25 10:31:48,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:31:48,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910454823] [2024-09-25 10:31:48,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910454823] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:31:48,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125986689] [2024-09-25 10:31:48,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:31:48,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:31:48,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:31:48,909 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) [2024-09-25 10:31:48,910 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 10:31:49,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2024-09-25 10:31:49,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:31:49,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-25 10:31:49,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:31:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-25 10:31:49,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:31:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-25 10:31:50,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125986689] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:31:50,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:31:50,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2024-09-25 10:31:50,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740992886] [2024-09-25 10:31:50,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:31:50,438 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-25 10:31:50,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:31:50,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-25 10:31:50,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-09-25 10:31:50,441 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:50,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:31:50,595 INFO L93 Difference]: Finished difference Result 171 states and 211 transitions. [2024-09-25 10:31:50,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-09-25 10:31:50,596 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2024-09-25 10:31:50,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:31:50,597 INFO L225 Difference]: With dead ends: 171 [2024-09-25 10:31:50,597 INFO L226 Difference]: Without dead ends: 154 [2024-09-25 10:31:50,598 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-09-25 10:31:50,599 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:31:50,599 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:31:50,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-09-25 10:31:50,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2024-09-25 10:31:50,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0268456375838926) internal successors, (153), 149 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:50,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2024-09-25 10:31:50,612 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 85 [2024-09-25 10:31:50,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:31:50,612 INFO L474 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2024-09-25 10:31:50,613 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:50,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:50,613 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2024-09-25 10:31:50,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-09-25 10:31:50,614 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:31:50,614 INFO L216 NwaCegarLoop]: trace histogram [68, 66, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:31:50,628 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-25 10:31:50,818 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:31:50,818 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:31:50,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:50,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1625920209, now seen corresponding path program 6 times [2024-09-25 10:31:50,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:31:50,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758293006] [2024-09-25 10:31:50,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:31:50,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:31:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:53,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:31:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4645 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-25 10:31:53,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:31:53,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758293006] [2024-09-25 10:31:53,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758293006] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:31:53,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751386330] [2024-09-25 10:31:53,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:31:53,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:31:53,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:31:53,702 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) [2024-09-25 10:31:53,707 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 10:31:53,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-25 10:31:53,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:31:53,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-25 10:31:53,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:31:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4645 backedges. 202 proven. 21 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2024-09-25 10:31:54,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:31:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4645 backedges. 202 proven. 21 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2024-09-25 10:31:54,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751386330] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:31:54,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:31:54,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 10, 10] total 85 [2024-09-25 10:31:54,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272643315] [2024-09-25 10:31:54,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:31:54,505 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-09-25 10:31:54,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:31:54,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-09-25 10:31:54,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2498, Invalid=4642, Unknown=0, NotChecked=0, Total=7140 [2024-09-25 10:31:54,507 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand has 85 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:56,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:31:56,492 INFO L93 Difference]: Finished difference Result 187 states and 205 transitions. [2024-09-25 10:31:56,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-09-25 10:31:56,492 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2024-09-25 10:31:56,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:31:56,496 INFO L225 Difference]: With dead ends: 187 [2024-09-25 10:31:56,496 INFO L226 Difference]: Without dead ends: 170 [2024-09-25 10:31:56,502 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3386 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8059, Invalid=14893, Unknown=0, NotChecked=0, Total=22952 [2024-09-25 10:31:56,503 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:31:56,503 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 70 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:31:56,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-09-25 10:31:56,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 164. [2024-09-25 10:31:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0251572327044025) internal successors, (163), 159 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:56,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 167 transitions. [2024-09-25 10:31:56,528 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 167 transitions. Word has length 153 [2024-09-25 10:31:56,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:31:56,529 INFO L474 AbstractCegarLoop]: Abstraction has 164 states and 167 transitions. [2024-09-25 10:31:56,529 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:31:56,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:56,530 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 167 transitions. [2024-09-25 10:31:56,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2024-09-25 10:31:56,531 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:31:56,531 INFO L216 NwaCegarLoop]: trace histogram [69, 67, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:31:56,548 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-25 10:31:56,731 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:31:56,732 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:31:56,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:31:56,733 INFO L85 PathProgramCache]: Analyzing trace with hash -2078130604, now seen corresponding path program 7 times [2024-09-25 10:31:56,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:31:56,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168477487] [2024-09-25 10:31:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:31:56,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:31:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:59,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:31:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4866 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-25 10:31:59,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:31:59,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168477487] [2024-09-25 10:31:59,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168477487] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:31:59,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319857630] [2024-09-25 10:31:59,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:31:59,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:31:59,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:31:59,544 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) [2024-09-25 10:31:59,545 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 10:31:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:31:59,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-09-25 10:31:59,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:31:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4866 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-25 10:31:59,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:32:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4866 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-25 10:32:04,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319857630] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:32:04,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:32:04,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2024-09-25 10:32:04,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022826344] [2024-09-25 10:32:04,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:32:04,476 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2024-09-25 10:32:04,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:32:04,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2024-09-25 10:32:04,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2024-09-25 10:32:04,492 INFO L87 Difference]: Start difference. First operand 164 states and 167 transitions. Second operand has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:32:04,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:32:04,863 INFO L93 Difference]: Finished difference Result 327 states and 402 transitions. [2024-09-25 10:32:04,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2024-09-25 10:32:04,864 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2024-09-25 10:32:04,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:32:04,866 INFO L225 Difference]: With dead ends: 327 [2024-09-25 10:32:04,866 INFO L226 Difference]: Without dead ends: 302 [2024-09-25 10:32:04,868 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2024-09-25 10:32:04,869 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:32:04,869 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:32:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-09-25 10:32:04,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2024-09-25 10:32:04,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 297 states have (on average 1.0134680134680134) internal successors, (301), 297 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:32:04,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 305 transitions. [2024-09-25 10:32:04,890 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 305 transitions. Word has length 163 [2024-09-25 10:32:04,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:32:04,891 INFO L474 AbstractCegarLoop]: Abstraction has 302 states and 305 transitions. [2024-09-25 10:32:04,891 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:32:04,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:32:04,891 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 305 transitions. [2024-09-25 10:32:04,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2024-09-25 10:32:04,894 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:32:04,894 INFO L216 NwaCegarLoop]: trace histogram [138, 136, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:32:04,907 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-25 10:32:05,098 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 [2024-09-25 10:32:05,099 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:32:05,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:32:05,100 INFO L85 PathProgramCache]: Analyzing trace with hash 275110883, now seen corresponding path program 8 times [2024-09-25 10:32:05,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:32:05,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936815737] [2024-09-25 10:32:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:32:05,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:32:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:32:16,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:32:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:32:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 19149 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-25 10:32:17,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:32:17,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936815737] [2024-09-25 10:32:17,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936815737] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:32:17,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628674075] [2024-09-25 10:32:17,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:32:17,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:32:17,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:32:17,004 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) [2024-09-25 10:32:17,005 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 10:32:17,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:32:17,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:32:17,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 274 conjuncts are in the unsatisfiable core [2024-09-25 10:32:17,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:32:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 19149 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-25 10:32:17,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:32:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 19149 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-25 10:32:34,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628674075] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:32:34,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:32:34,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 277 [2024-09-25 10:32:34,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822323042] [2024-09-25 10:32:34,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:32:34,399 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2024-09-25 10:32:34,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:32:34,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2024-09-25 10:32:34,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2024-09-25 10:32:34,410 INFO L87 Difference]: Start difference. First operand 302 states and 305 transitions. Second operand has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:32:35,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:32:35,502 INFO L93 Difference]: Finished difference Result 603 states and 747 transitions. [2024-09-25 10:32:35,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2024-09-25 10:32:35,503 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 301 [2024-09-25 10:32:35,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:32:35,507 INFO L225 Difference]: With dead ends: 603 [2024-09-25 10:32:35,507 INFO L226 Difference]: Without dead ends: 578 [2024-09-25 10:32:35,510 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2024-09-25 10:32:35,514 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-25 10:32:35,515 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-25 10:32:35,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2024-09-25 10:32:35,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2024-09-25 10:32:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 573 states have (on average 1.006980802792321) internal successors, (577), 573 states have internal predecessors, (577), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:32:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 581 transitions. [2024-09-25 10:32:35,561 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 581 transitions. Word has length 301 [2024-09-25 10:32:35,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:32:35,562 INFO L474 AbstractCegarLoop]: Abstraction has 578 states and 581 transitions. [2024-09-25 10:32:35,562 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:32:35,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:32:35,562 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 581 transitions. [2024-09-25 10:32:35,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2024-09-25 10:32:35,568 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:32:35,568 INFO L216 NwaCegarLoop]: trace histogram [276, 274, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:32:35,581 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-25 10:32:35,772 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 [2024-09-25 10:32:35,773 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:32:35,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:32:35,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1282507457, now seen corresponding path program 9 times [2024-09-25 10:32:35,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:32:35,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235162679] [2024-09-25 10:32:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:32:35,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:32:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:33:36,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:33:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:33:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 76281 backedges. 825 proven. 75350 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-09-25 10:33:36,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:33:36,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235162679] [2024-09-25 10:33:36,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235162679] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:33:36,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317518804] [2024-09-25 10:33:36,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:33:36,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:33:36,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:33:36,429 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) [2024-09-25 10:33:36,430 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 10:33:36,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-25 10:33:36,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:33:36,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-25 10:33:36,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:33:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 76281 backedges. 1370 proven. 4 refuted. 0 times theorem prover too weak. 74907 trivial. 0 not checked. [2024-09-25 10:33:37,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:33:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 76281 backedges. 1370 proven. 4 refuted. 0 times theorem prover too weak. 74907 trivial. 0 not checked. [2024-09-25 10:33:37,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317518804] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:33:37,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:33:37,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [277, 5, 5] total 283 [2024-09-25 10:33:37,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705220300] [2024-09-25 10:33:37,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:33:37,647 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 283 states [2024-09-25 10:33:37,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:33:37,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 283 interpolants. [2024-09-25 10:33:37,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39903, Invalid=39903, Unknown=0, NotChecked=0, Total=79806 [2024-09-25 10:33:37,656 INFO L87 Difference]: Start difference. First operand 578 states and 581 transitions. Second operand has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:33:38,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:33:38,842 INFO L93 Difference]: Finished difference Result 613 states and 628 transitions. [2024-09-25 10:33:38,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 283 states. [2024-09-25 10:33:38,843 INFO L78 Accepts]: Start accepts. Automaton has has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 577 [2024-09-25 10:33:38,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:33:38,847 INFO L225 Difference]: With dead ends: 613 [2024-09-25 10:33:38,847 INFO L226 Difference]: Without dead ends: 588 [2024-09-25 10:33:38,850 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1432 GetRequests, 1151 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=39903, Invalid=39903, Unknown=0, NotChecked=0, Total=79806 [2024-09-25 10:33:38,850 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-25 10:33:38,850 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-25 10:33:38,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2024-09-25 10:33:38,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 588. [2024-09-25 10:33:38,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 583 states have (on average 1.0137221269296741) internal successors, (591), 583 states have internal predecessors, (591), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:33:38,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 595 transitions. [2024-09-25 10:33:38,889 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 595 transitions. Word has length 577 [2024-09-25 10:33:38,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:33:38,889 INFO L474 AbstractCegarLoop]: Abstraction has 588 states and 595 transitions. [2024-09-25 10:33:38,890 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 283 states, 283 states have (on average 2.0318021201413425) internal successors, (575), 283 states have internal predecessors, (575), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:33:38,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:33:38,890 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 595 transitions. [2024-09-25 10:33:38,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2024-09-25 10:33:38,896 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:33:38,897 INFO L216 NwaCegarLoop]: trace histogram [281, 275, 14, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:33:38,910 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-25 10:33:39,097 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-25 10:33:39,097 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:33:39,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:33:39,098 INFO L85 PathProgramCache]: Analyzing trace with hash -121382824, now seen corresponding path program 10 times [2024-09-25 10:33:39,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:33:39,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54495611] [2024-09-25 10:33:39,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:33:39,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:33:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:34:42,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:34:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:34:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 79066 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-09-25 10:34:42,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:34:42,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54495611] [2024-09-25 10:34:42,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54495611] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:34:42,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500683673] [2024-09-25 10:34:42,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:34:42,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:34:42,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:34:42,457 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) [2024-09-25 10:34:42,458 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 10:34:42,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:34:42,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:34:42,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 1801 conjuncts, 552 conjuncts are in the unsatisfiable core [2024-09-25 10:34:42,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:34:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 79066 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-09-25 10:34:43,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:35:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 79066 backedges. 3036 proven. 75900 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-09-25 10:35:49,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500683673] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:35:49,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:35:49,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 278, 278] total 555 [2024-09-25 10:35:49,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353381075] [2024-09-25 10:35:49,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:35:49,817 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 555 states [2024-09-25 10:35:49,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:35:49,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 555 interpolants. [2024-09-25 10:35:49,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2024-09-25 10:35:49,843 INFO L87 Difference]: Start difference. First operand 588 states and 595 transitions. Second operand has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:35:56,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:35:56,655 INFO L93 Difference]: Finished difference Result 1175 states and 1466 transitions. [2024-09-25 10:35:56,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 554 states. [2024-09-25 10:35:56,658 INFO L78 Accepts]: Start accepts. Automaton has has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 587 [2024-09-25 10:35:56,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:35:56,662 INFO L225 Difference]: With dead ends: 1175 [2024-09-25 10:35:56,662 INFO L226 Difference]: Without dead ends: 1142 [2024-09-25 10:35:56,672 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1453 GetRequests, 900 SyntacticMatches, 0 SemanticMatches, 553 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 89.0s TimeCoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2024-09-25 10:35:56,672 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-25 10:35:56,673 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-25 10:35:56,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2024-09-25 10:35:56,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1142. [2024-09-25 10:35:56,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1137 states have (on average 1.0070360598065085) internal successors, (1145), 1137 states have internal predecessors, (1145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:35:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1149 transitions. [2024-09-25 10:35:56,736 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1149 transitions. Word has length 587 [2024-09-25 10:35:56,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:35:56,737 INFO L474 AbstractCegarLoop]: Abstraction has 1142 states and 1149 transitions. [2024-09-25 10:35:56,737 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-25 10:35:56,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:35:56,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1149 transitions. [2024-09-25 10:35:56,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1142 [2024-09-25 10:35:56,782 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:35:56,782 INFO L216 NwaCegarLoop]: trace histogram [558, 552, 14, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:35:56,803 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-25 10:35:56,986 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-25 10:35:56,987 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:35:56,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:35:56,987 INFO L85 PathProgramCache]: Analyzing trace with hash 179381079, now seen corresponding path program 11 times [2024-09-25 10:35:56,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:35:56,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716308434] [2024-09-25 10:35:56,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:35:56,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:35:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat